High level conclusions

Fuzzers reach 35.0% of cyclomatic complexity.

Fuzzers reach 8.270% of all functions.

Reachability and coverage overview

Functions statically reachable by fuzzers

11 / 133

Cyclomatic complexity statically reachable by fuzzers

21 / 60

Runtime code coverage of functions

27 / 133

Warning: The number of runtime covered functions are larger than the number of reachable functions. This means that Fuzz Introspector found there are more functions covered at runtime than what is considered reachable based on the static analysis. This is a limitation in the analysis as anything covered at runtime is by definition reachable by the fuzzers.
This is likely due to a limitation in the static analysis. In this case, the count of functions covered at runtime is the true value, which means this is what should be considered "achieved" by the fuzzer.

Use the project functions table below to query all functions that were not covered at runtime.

The following table shows data about each function in the project. The functions included in this table correspond to all functions that exist in the executables of the fuzzers. As such, there may be functions that are from third-party libraries.

For further technical details on the meaning of columns in the below table, please see the Glossary .

Func name	Functions filename	Args	Function call depth	Reached by Fuzzers	Fuzzers runtime hit	Func lines hit %	I Count	BB Count	Cyclomatic complexity	Functions reached	Reached by functions	Accumulated cyclomatic complexity	Undiscovered complexity

Fuzzer: NTFTPEntryParserFuzzer

Call tree

The calltree shows the control flow of the fuzzer. This is overlaid with coverage information to display how much of the potential code a fuzzer can reach is in fact covered at runtime. In the following there is a link to a detailed calltree visualisation as well as a bitmap showing a high-level view of the calltree. For further information about these topics please see the glossary for full calltree and calltree overview

Call tree overview bitmap:

The distribution of callsites in terms of coloring is

Color	Runtime hitcount	Callsite count	Percentage
red	0	116	47.5%
gold	[1:9]	111	45.4%
yellow	[10:29]	16	6.55%
greenyellow	[30:49]	0	0.0%
lawngreen	50+	1	0.40%
All colors	244	100

Fuzz blockers

The following nodes represent call sites where fuzz blockers occur.

Amount of callsites blocked	Calltree index	Parent function	Callsite	Largest blocked function
38	142	[org.apache.commons.net.ftp.parser.FTPTimestampParserImpl].parseTimestamp(java.lang.String,java.util.Calendar)	call site: 00142
28	214	[org.apache.commons.net.ftp.parser.NTFTPEntryParser].parseFTPEntry(java.lang.String)	call site: 00214
10	68	[org.apache.commons.net.ftp.parser.FTPTimestampParserImpl].configure(org.apache.commons.net.ftp.FTPClientConfig)	call site: 00068
8	58	[org.apache.commons.net.ftp.parser.ConfigurableFTPFileEntryParserImpl].configure(org.apache.commons.net.ftp.FTPClientConfig)	call site: 00058
5	25	[org.apache.commons.net.ftp.parser.FTPTimestampParserImpl].getEntry(java.text.SimpleDateFormat)	call site: 00025
5	202	[org.apache.commons.net.ftp.parser.NTFTPEntryParser].parseFTPEntry(java.lang.String)	call site: 00202
4	8	[org.apache.commons.net.ftp.parser.RegexFTPFileEntryParserImpl].compileRegex(java.lang.String,int)	call site: 00008
3	21	[org.apache.commons.net.ftp.parser.FTPTimestampParserImpl].getEntry(java.text.SimpleDateFormat)	call site: 00021
2	90	[org.apache.commons.net.ftp.FTPClientConfig].lookupDateFormatSymbols(java.lang.String)	call site: 00090
1	32	[org.apache.commons.net.ftp.parser.FTPTimestampParserImpl].getEntry(java.text.SimpleDateFormat)	call site: 00032
1	34	[org.apache.commons.net.ftp.parser.FTPTimestampParserImpl].getEntry(java.text.SimpleDateFormat)	call site: 00034
1	36	[org.apache.commons.net.ftp.parser.FTPTimestampParserImpl]. ()	call site: 00036

Runtime coverage analysis

Covered functions

87

Functions that are reachable but not covered

34

Reachable functions

50

Percentage of reachable functions covered

32.0%

NB: The sum of covered functions and functions that are reachable but not covered need not be equal to Reachable functions . This is because the reachability analysis is an approximation and thus at runtime some functions may be covered that are not included in the reachability analysis. This is a limitation of our static analysis capabilities.

Warning: The number of covered functions are larger than the number of reachable functions. This means that there are more functions covered at runtime than are extracted using static analysis. This is likely a result of the static analysis component failing to extract the right call graph or the coverage runtime being compiled with sanitizers in code that the static analysis has not analysed. This can happen if lto/gold is not used in all places that coverage instrumentation is used.

Function name	source code lines	source lines hit	percentage hit

Files reached

filename	functions hit
NTFTPEntryParserFuzzer	1
org.apache.commons.net.ftp.parser.NTFTPEntryParser	4
org.apache.commons.net.ftp.parser.ConfigurableFTPFileEntryParserImpl	3
org.apache.commons.net.ftp.parser.RegexFTPFileEntryParserImpl	4
org.apache.commons.net.ftp.FTPFileEntryParserImpl	1
java.lang.Object	1
java.util.regex.Pattern	2
java.lang.IllegalArgumentException	1
java.lang.StringBuilder	4
org.apache.commons.net.ftp.parser.FTPTimestampParserImpl	11
java.text.SimpleDateFormat	5
java.text.DateFormat	3
java.lang.String	9
java.lang.StringLatin1	4
java.lang.StringUTF16	5
org.apache.commons.net.ftp.parser.UnixFTPEntryParser	1
org.apache.commons.net.ftp.FTPClientConfig	13
org.apache.commons.net.ftp.parser.OS400FTPEntryParser	1
org.apache.commons.net.ftp.parser.MVSFTPEntryParser	1
org.apache.commons.net.ftp.parser.OS2FTPEntryParser	1
org.apache.commons.net.ftp.parser.MacOsPeterFTPEntryParser	1
org.apache.commons.net.ftp.parser.NetwareFTPEntryParser	1
org.apache.commons.net.ftp.parser.VMSFTPEntryParser	1
java.util.StringTokenizer	4
java.text.DateFormatSymbols	2
java.util.IdentityHashMap	1
java.util.HashMap	1
java.util.Hashtable	1
java.util.TreeMap	1
java.util.jar.Attributes	1
java.util.WeakHashMap	1
java.util.concurrent.ConcurrentHashMap	1
java.util.Properties	1
java.security.Provider	1
java.util.AbstractMap	1
java.util.LinkedHashMap	1
java.util.TimeZone	2
org.apache.commons.net.ftp.FTPClient	1
com.code_intelligence.jazzer.api.FuzzedDataProvider	1
org.apache.commons.net.ftp.FTPFile	6
java.util.regex.Matcher	3
java.util.Calendar	8
java.util.GregorianCalendar	3
java.lang.Integer	3
java.text.ParsePosition	3
java.util.Date	1
java.text.ParseException	1
java.lang.Long	2
java.lang.NumberFormatException	2
java.lang.Character	2
java.lang.CharacterData	1

Fuzzer: Base64Fuzzer

Call tree

The calltree shows the control flow of the fuzzer. This is overlaid with coverage information to display how much of the potential code a fuzzer can reach is in fact covered at runtime. In the following there is a link to a detailed calltree visualisation as well as a bitmap showing a high-level view of the calltree. For further information about these topics please see the glossary for full calltree and calltree overview

Call tree overview bitmap:

The distribution of callsites in terms of coloring is

Color	Runtime hitcount	Callsite count	Percentage
red	0	41	62.1%
gold	[1:9]	20	30.3%
yellow	[10:29]	4	6.06%
greenyellow	[30:49]	0	0.0%
lawngreen	50+	1	1.51%
All colors	66	100

Fuzz blockers

The following nodes represent call sites where fuzz blockers occur.

Amount of callsites blocked	Calltree index	Parent function	Callsite	Largest blocked function
27	7	[org.apache.commons.net.util.Base64].newStringUtf8(byte[])	call site: 00007
9	40	[org.apache.commons.net.util.Base64].encode(byte[])	call site: 00040
3	1	[Base64Fuzzer].fuzzerTestOneInput(com.code_intelligence.jazzer.api.FuzzedDataProvider)	call site: 00001
1	5	[org.apache.commons.net.util.Base64].containsBase64Byte(byte[])	call site: 00005
1	53	[org.apache.commons.net.util.Base64].encodeBase64(byte[])	call site: 00053

Runtime coverage analysis

Covered functions

87

Functions that are reachable but not covered

18

Reachable functions

28

Percentage of reachable functions covered

35.71%

NB: The sum of covered functions and functions that are reachable but not covered need not be equal to Reachable functions . This is because the reachability analysis is an approximation and thus at runtime some functions may be covered that are not included in the reachability analysis. This is a limitation of our static analysis capabilities.

Warning: The number of covered functions are larger than the number of reachable functions. This means that there are more functions covered at runtime than are extracted using static analysis. This is likely a result of the static analysis component failing to extract the right call graph or the coverage runtime being compiled with sanitizers in code that the static analysis has not analysed. This can happen if lto/gold is not used in all places that coverage instrumentation is used.

Function name	source code lines	source lines hit	percentage hit

Files reached

filename	functions hit
Base64Fuzzer	1
org.apache.commons.net.util.Base64	17
java.lang.Object	1
java.lang.System	1
java.lang.String	3
java.lang.NullPointerException	1
java.lang.RuntimeException	1
java.lang.Exception	1
java.lang.Throwable	3
sun.nio.fs.UnixException	1
java.lang.StringIndexOutOfBoundsException	1
java.lang.StringBuilder	4
java.lang.StringCoding	1
java.lang.IllegalArgumentException	1
com.code_intelligence.jazzer.api.FuzzedDataProvider	3
java.lang.Math	1
java.util.Base64$Encoder	3
java.util.Base64	4
java.util.Base64$Decoder	1

Fuzzer: MLSxEntryParserFuzzer

Call tree

The calltree shows the control flow of the fuzzer. This is overlaid with coverage information to display how much of the potential code a fuzzer can reach is in fact covered at runtime. In the following there is a link to a detailed calltree visualisation as well as a bitmap showing a high-level view of the calltree. For further information about these topics please see the glossary for full calltree and calltree overview

Call tree overview bitmap:

The distribution of callsites in terms of coloring is

Color	Runtime hitcount	Callsite count	Percentage
red	0	122	62.2%
gold	[1:9]	72	36.7%
yellow	[10:29]	1	0.51%
greenyellow	[30:49]	0	0.0%
lawngreen	50+	1	0.51%
All colors	196	100

Fuzz blockers

The following nodes represent call sites where fuzz blockers occur.

Amount of callsites blocked	Calltree index	Parent function	Callsite	Largest blocked function
50	26	[org.apache.commons.net.ftp.parser.MLSxEntryParser].parseFTPEntry(java.lang.String)	call site: 00026
25	120	[org.apache.commons.net.ftp.parser.MLSxEntryParser].parseFTPEntry(java.lang.String)	call site: 00120
17	87	[org.apache.commons.net.ftp.parser.MLSxEntryParser].parseFTPEntry(java.lang.String)	call site: 00087
9	4	[org.apache.commons.net.ftp.parser.MLSxEntryParser].parseFTPEntry(java.lang.String)	call site: 00004
6	19	[org.apache.commons.net.ftp.parser.MLSxEntryParser].parseFTPEntry(java.lang.String)	call site: 00019
5	113	[org.apache.commons.net.ftp.parser.MLSxEntryParser].parseFTPEntry(java.lang.String)	call site: 00113
3	78	[org.apache.commons.net.ftp.parser.MLSxEntryParser].parseFTPEntry(java.lang.String)	call site: 00078
3	105	[org.apache.commons.net.ftp.parser.MLSxEntryParser].parseFTPEntry(java.lang.String)	call site: 00105
3	183	[org.apache.commons.net.ftp.parser.MLSxEntryParser].doUnixPerms(org.apache.commons.net.ftp.FTPFile,java.lang.String)	call site: 00183
1	85	[org.apache.commons.net.ftp.parser.MLSxEntryParser].parseFTPEntry(java.lang.String)	call site: 00085

Runtime coverage analysis

Covered functions

87

Functions that are reachable but not covered

28

Reachable functions

42

Percentage of reachable functions covered

33.33%

NB: The sum of covered functions and functions that are reachable but not covered need not be equal to Reachable functions . This is because the reachability analysis is an approximation and thus at runtime some functions may be covered that are not included in the reachability analysis. This is a limitation of our static analysis capabilities.

Warning: The number of covered functions are larger than the number of reachable functions. This means that there are more functions covered at runtime than are extracted using static analysis. This is likely a result of the static analysis component failing to extract the right call graph or the coverage runtime being compiled with sanitizers in code that the static analysis has not analysed. This can happen if lto/gold is not used in all places that coverage instrumentation is used.

Function name	source code lines	source lines hit	percentage hit

Files reached

filename	functions hit
MLSxEntryParserFuzzer	1
org.apache.commons.net.ftp.parser.MLSxEntryParser	4
com.code_intelligence.jazzer.api.FuzzedDataProvider	1
java.lang.String	22
java.lang.StringUTF16	9
org.apache.commons.net.ftp.FTPFile	9
java.lang.Object	1
java.lang.StringIndexOutOfBoundsException	2
java.lang.StringLatin1	7
java.util.ArrayList	6
java.lang.StringBuilder	4
java.util.Vector	1
java.util.concurrent.CopyOnWriteArrayList	1
java.util.AbstractCollection	1
java.util.LinkedList	1
java.util.regex.Pattern	2
java.lang.StringBuffer	1
java.lang.AbstractStringBuilder	1
java.nio.CharBuffer	1
java.lang.Long	2
java.lang.NumberFormatException	2
java.lang.Character	2
java.lang.CharacterData	1
java.text.SimpleDateFormat	2
java.util.TimeZone	1
java.text.DateFormat	2
java.util.GregorianCalendar	1
java.text.ParsePosition	2
java.util.Calendar	2
java.util.LinkedHashMap	1
java.util.HashMap	1
java.lang.Integer	1

Fuzzer: OS400FTPEntryParserFuzzer

Call tree

The calltree shows the control flow of the fuzzer. This is overlaid with coverage information to display how much of the potential code a fuzzer can reach is in fact covered at runtime. In the following there is a link to a detailed calltree visualisation as well as a bitmap showing a high-level view of the calltree. For further information about these topics please see the glossary for full calltree and calltree overview

Call tree overview bitmap:

The distribution of callsites in terms of coloring is

Color	Runtime hitcount	Callsite count	Percentage
red	0	178	56.1%
gold	[1:9]	118	37.2%
yellow	[10:29]	20	6.30%
greenyellow	[30:49]	0	0.0%
lawngreen	50+	1	0.31%
All colors	317	100

Fuzz blockers

The following nodes represent call sites where fuzz blockers occur.

Amount of callsites blocked	Calltree index	Parent function	Callsite	Largest blocked function
38	141	[org.apache.commons.net.ftp.parser.FTPTimestampParserImpl].parseTimestamp(java.lang.String,java.util.Calendar)	call site: 00141
28	256	[org.apache.commons.net.ftp.parser.OS400FTPEntryParser].parseFTPEntry(java.lang.String)	call site: 00256
25	199	[org.apache.commons.net.ftp.parser.OS400FTPEntryParser].parseFTPEntry(java.lang.String)	call site: 00199
14	288	[org.apache.commons.net.ftp.parser.OS400FTPEntryParser].parseFTPEntry(java.lang.String)	call site: 00288
10	68	[org.apache.commons.net.ftp.parser.FTPTimestampParserImpl].configure(org.apache.commons.net.ftp.FTPClientConfig)	call site: 00068
10	231	[org.apache.commons.net.ftp.parser.OS400FTPEntryParser].parseFTPEntry(java.lang.String)	call site: 00231
8	58	[org.apache.commons.net.ftp.parser.ConfigurableFTPFileEntryParserImpl].configure(org.apache.commons.net.ftp.FTPClientConfig)	call site: 00058
6	309	[org.apache.commons.net.ftp.parser.OS400FTPEntryParser].parseFTPEntry(java.lang.String)	call site: 00309
5	25	[org.apache.commons.net.ftp.parser.FTPTimestampParserImpl].getEntry(java.text.SimpleDateFormat)	call site: 00025
5	303	[org.apache.commons.net.ftp.parser.OS400FTPEntryParser].parseFTPEntry(java.lang.String)	call site: 00303
4	8	[org.apache.commons.net.ftp.parser.RegexFTPFileEntryParserImpl].compileRegex(java.lang.String,int)	call site: 00008
3	21	[org.apache.commons.net.ftp.parser.FTPTimestampParserImpl].getEntry(java.text.SimpleDateFormat)	call site: 00021

Runtime coverage analysis

Covered functions

87

Functions that are reachable but not covered

15

Reachable functions

29

Percentage of reachable functions covered

48.28%

NB: The sum of covered functions and functions that are reachable but not covered need not be equal to Reachable functions . This is because the reachability analysis is an approximation and thus at runtime some functions may be covered that are not included in the reachability analysis. This is a limitation of our static analysis capabilities.

Warning: The number of covered functions are larger than the number of reachable functions. This means that there are more functions covered at runtime than are extracted using static analysis. This is likely a result of the static analysis component failing to extract the right call graph or the coverage runtime being compiled with sanitizers in code that the static analysis has not analysed. This can happen if lto/gold is not used in all places that coverage instrumentation is used.

Function name	source code lines	source lines hit	percentage hit

Files reached

filename	functions hit
OS400FTPEntryParserFuzzer	1
org.apache.commons.net.ftp.parser.OS400FTPEntryParser	5
org.apache.commons.net.ftp.parser.ConfigurableFTPFileEntryParserImpl	3
org.apache.commons.net.ftp.parser.RegexFTPFileEntryParserImpl	4
org.apache.commons.net.ftp.FTPFileEntryParserImpl	1
java.lang.Object	1
java.util.regex.Pattern	2
java.lang.IllegalArgumentException	1
java.lang.StringBuilder	4
org.apache.commons.net.ftp.parser.FTPTimestampParserImpl	11
java.text.SimpleDateFormat	5
java.text.DateFormat	3
java.lang.String	21
java.lang.StringLatin1	10
java.lang.StringUTF16	11
org.apache.commons.net.ftp.parser.VMSFTPEntryParser	1
org.apache.commons.net.ftp.FTPClientConfig	12
org.apache.commons.net.ftp.parser.OS2FTPEntryParser	1
org.apache.commons.net.ftp.parser.MVSFTPEntryParser	1
org.apache.commons.net.ftp.parser.NTFTPEntryParser	1
org.apache.commons.net.ftp.parser.MacOsPeterFTPEntryParser	1
org.apache.commons.net.ftp.parser.UnixFTPEntryParser	1
org.apache.commons.net.ftp.parser.NetwareFTPEntryParser	1
org.apache.commons.net.ftp.FTPClient:org.apache.commons.net.ftp.FTPClientConfig	1
java.util.StringTokenizer	4
java.text.DateFormatSymbols	2
java.util.LinkedHashMap	1
java.util.jar.Attributes	1
java.util.concurrent.ConcurrentHashMap	1
java.util.AbstractMap	1
java.util.WeakHashMap	1
java.util.IdentityHashMap	1
java.util.TreeMap	1
java.util.Hashtable	1
java.util.Properties	1
java.util.HashMap	1
java.security.Provider	1
java.util.TimeZone	2
org.apache.commons.net.ftp.FTPFile	7
java.util.regex.Matcher	3
java.util.Calendar	8
java.util.GregorianCalendar	3
java.lang.Integer	3
java.text.ParsePosition	3
java.util.Date	1
java.text.ParseException	1
java.lang.Long	2
java.lang.NumberFormatException	2
java.lang.Character	2
java.lang.CharacterData	1
java.lang.StringIndexOutOfBoundsException	2

Fuzzer: TelnetOptionFuzzer

Call tree

The calltree shows the control flow of the fuzzer. This is overlaid with coverage information to display how much of the potential code a fuzzer can reach is in fact covered at runtime. In the following there is a link to a detailed calltree visualisation as well as a bitmap showing a high-level view of the calltree. For further information about these topics please see the glossary for full calltree and calltree overview

Call tree overview bitmap:

The distribution of callsites in terms of coloring is

Color	Runtime hitcount	Callsite count	Percentage
red	0	0	0.0%
gold	[1:9]	5	83.3%
yellow	[10:29]	0	0.0%
greenyellow	[30:49]	0	0.0%
lawngreen	50+	1	16.6%
All colors	6	100

Runtime coverage analysis

Covered functions

87

Functions that are reachable but not covered

2

Reachable functions

5

Percentage of reachable functions covered

60.0%

NB: The sum of covered functions and functions that are reachable but not covered need not be equal to Reachable functions . This is because the reachability analysis is an approximation and thus at runtime some functions may be covered that are not included in the reachability analysis. This is a limitation of our static analysis capabilities.

Warning: The number of covered functions are larger than the number of reachable functions. This means that there are more functions covered at runtime than are extracted using static analysis. This is likely a result of the static analysis component failing to extract the right call graph or the coverage runtime being compiled with sanitizers in code that the static analysis has not analysed. This can happen if lto/gold is not used in all places that coverage instrumentation is used.

Function name	source code lines	source lines hit	percentage hit

Files reached

filename	functions hit
TelnetOptionFuzzer	1
com.code_intelligence.jazzer.api.FuzzedDataProvider	1
org.apache.commons.net.telnet.TelnetOption	2
java.lang.String	1

Optimal target analysis

Remaining optimal interesting functions

The following table shows a list of functions that are optimal targets. Optimal targets are identified by finding the functions that in combination, yield a high code coverage.

Func name	Functions filename	Arg count	Args	Function depth	hitcount	instr count	bb count	cyclomatic complexity	Reachable functions	Incoming references	total cyclomatic complexity	Unreached complexity
[org.apache.commons.net.telnet.TelnetInputStream].read(byte[],int,int)	org.apache.commons.net.telnet.TelnetInputStream	3	['byte[]', 'int', 'int']	6	0	36	12	3	57	1	128	128
[org.apache.commons.net.ftp.FTPClient]._retrieveFile(java.lang.String,java.lang.String,java.io.OutputStream)	org.apache.commons.net.ftp.FTPClient	3	['java.lang.String', 'java.lang.String', 'java.io.OutputStream']	9	0	50	15	3	123	1	109	109
[org.apache.commons.net.nntp.Threader].thread(java.lang.Iterable )	org.apache.commons.net.nntp.Threader	1	['java.lang.Iterable ']	3	0	51	20	6	29	0	62	62
[org.apache.commons.net.ftp.parser.MVSFTPEntryParser].parseFTPEntry(java.lang.String)	org.apache.commons.net.ftp.parser.MVSFTPEntryParser	1	['java.lang.String']	6	0	16	7	1	109	0	76	58
[org.apache.commons.net.imap.AuthenticatingIMAPClient].auth(org.apache.commons.net.imap.AuthenticatingIMAPClient$AUTH_METHOD,java.lang.String,java.lang.String)	org.apache.commons.net.imap.AuthenticatingIMAPClient	3	['org.apache.commons.net.imap.AuthenticatingIMAPClient$AUTH_METHOD', 'java.lang.String', 'java.lang.String']	9	0	105	30	9	71	1	53	53
[org.apache.commons.net.ftp.FTPSClient]._openDataConnection_(java.lang.String,java.lang.String)	org.apache.commons.net.ftp.FTPSClient	2	['java.lang.String', 'java.lang.String']	9	0	28	9	5	123	1	106	48

Implementing fuzzers that target the above functions will improve reachability such that it becomes:

Functions statically reachable by fuzzers

30 / 133

Cyclomatic complexity statically reachable by fuzzers

49 / 60

All functions overview

If you implement fuzzers for these functions, the status of all functions in the project will be:

Func name	Functions filename	Args	Function call depth	Reached by Fuzzers	Fuzzers runtime hit	Func lines hit %	I Count	BB Count	Cyclomatic complexity	Functions reached	Reached by functions	Accumulated cyclomatic complexity	Undiscovered complexity

This sections provides heuristics that can be used as input to a fuzz engine when running a given fuzz target. The current focus is on providing input that is usable by libFuzzer.

NTFTPEntryParserFuzzer

Dictionary

Use this with the libFuzzer -dict=DICT.file flag

Fuzzer function priority

Use one of these functions as input to libfuzzer with flag: -focus_function name

-focus_function=['parseTimestamp(java.lang.String,java.util.Calendar)', 'parseFTPEntry(java.lang.String)', 'configure(org.apache.commons.net.ftp.FTPClientConfig)', 'getEntry(java.text.SimpleDateFormat)', 'compileRegex(java.lang.String,int)', 'lookupDateFormatSymbols(java.lang.String)']

Base64Fuzzer

Dictionary

Use this with the libFuzzer -dict=DICT.file flag

Fuzzer function priority

Use one of these functions as input to libfuzzer with flag: -focus_function name

-focus_function=['newStringUtf8(byte[])', 'encode(byte[])', 'fuzzerTestOneInput(com.code_intelligence.jazzer.api.FuzzedDataProvider)', 'containsBase64Byte(byte[])', 'encodeBase64(byte[])']

MLSxEntryParserFuzzer

Dictionary

Use this with the libFuzzer -dict=DICT.file flag

Fuzzer function priority

Use one of these functions as input to libfuzzer with flag: -focus_function name

-focus_function=['parseFTPEntry(java.lang.String)', 'doUnixPerms(org.apache.commons.net.ftp.FTPFile,java.lang.String)']

OS400FTPEntryParserFuzzer

Dictionary

Use this with the libFuzzer -dict=DICT.file flag

Fuzzer function priority

Use one of these functions as input to libfuzzer with flag: -focus_function name

-focus_function=['parseTimestamp(java.lang.String,java.util.Calendar)', 'parseFTPEntry(java.lang.String)', 'configure(org.apache.commons.net.ftp.FTPClientConfig)', 'getEntry(java.text.SimpleDateFormat)']

TelnetOptionFuzzer

Dictionary

Use this with the libFuzzer -dict=DICT.file flag

This section shows analysis of runtime coverage data.

For futher technical details on how this section is generated, please see the Glossary .

Complex functions with low coverage

Func name	Function total lines	Lines covered at runtime	percentage covered	Reached by fuzzers
[org.apache.commons.net.imap.IMAPClient$SEARCH_CRITERIA]. ()	36	0	0.0%
[org.apache.commons.net.imap.IMAP].getReply(boolean)	31	0	0.0%	[]
[org.apache.commons.net.imap.AuthenticatingIMAPClient].auth(org.apache.commons.net.imap.AuthenticatingIMAPClient$AUTH_METHOD,java.lang.String,java.lang.String)	31	0	0.0%	[]
[org.apache.commons.net.io.DotTerminatedMessageReader].read()	33	0	0.0%	[]
[org.apache.commons.net.ftp.FTPCmd]. ()	76	0	0.0%
[org.apache.commons.net.ftp.FTPClient]._openDataConnection_(java.lang.String,java.lang.String)	55	0	0.0%	[]
[org.apache.commons.net.ftp.FTPHTTPClient].tunnelHandshake(java.lang.String,int,java.io.InputStream,java.io.OutputStream)	34	0	0.0%	[]
[org.apache.commons.net.ftp.FTPFile].toFormattedString(java.lang.String)	33	0	0.0%	[]
[org.apache.commons.net.ftp.FTP].getReply(boolean)	34	0	0.0%	[]
[org.apache.commons.net.ftp.FTPSClient].openDataSecureConnection(java.lang.String,java.lang.String)	60	0	0.0%	[]
[org.apache.commons.net.nntp.Threader].buildContainer(org.apache.commons.net.nntp.Threadable,java.util.HashMap)	43	0	0.0%
[org.apache.commons.net.nntp.Threader].gatherSubjects(org.apache.commons.net.nntp.NntpThreadContainer)	59	0	0.0%	[]
[org.apache.commons.net.nntp.NewGroupsOrNewsQuery]. (java.util.Calendar,boolean)	60	0	0.0%
[org.apache.commons.net.ntp.TimeInfo].computeDetails()	41	0	0.0%	[]
[org.apache.commons.net.ftp.parser.DefaultFTPFileEntryParserFactory].createFileEntryParser(java.lang.String,org.apache.commons.net.ftp.FTPClientConfig)	38	0	0.0%	[]
[org.apache.commons.net.ftp.parser.UnixFTPEntryParser].parseFTPEntry(java.lang.String)	60	0	0.0%	[]
[org.apache.commons.net.ftp.parser.VMSFTPEntryParser].parseFTPEntry(java.lang.String)	42	0	0.0%	[]
[org.apache.commons.net.ftp.parser.EnterpriseUnixFTPEntryParser].parseFTPEntry(java.lang.String)	44	0	0.0%	[]
[org.apache.commons.net.ftp.parser.MacOsPeterFTPEntryParser].parseFTPEntry(java.lang.String)	55	0	0.0%	[]
[org.apache.commons.net.telnet.TelnetInputStream].read()	47	0	0.0%	[]
[org.apache.commons.net.telnet.TelnetInputStream].read(boolean)	86	0	0.0%	[]
[org.apache.commons.net.telnet.TelnetInputStream].run()	39	0	0.0%	[]
[org.apache.commons.net.tftp.TFTPClient].receiveFile(java.lang.String,int,java.io.OutputStream,java.net.InetAddress,int)	69	0	0.0%	[]
[org.apache.commons.net.tftp.TFTPClient].sendFile(java.lang.String,int,java.io.InputStream,java.net.InetAddress,int)	69	0	0.0%	[]

This section shows which files and directories are considered in this report. The main reason for showing this is fuzz introspector may include more code in the reasoning than is desired. This section helps identify if too many files/directories are included, e.g. third party code, which may be irrelevant for the threat model. In the event too much is included, fuzz introspector supports a configuration file that can exclude data from the report. See the following link for more information on how to create a config file: link

Files in report

Source file	Reached by	Covered by
org.apache.commons.net.nntp.Article	[]	[]
org.apache.commons.net.ftp.FTPFile	['NTFTPEntryParserFuzzer', 'MLSxEntryParserFuzzer', 'OS400FTPEntryParserFuzzer']	[]
org.apache.commons.net.smtp.SMTPSClient	[]	[]
org.apache.commons.net.tftp.TFTPDataPacket	[]	[]
org.apache.commons.net.nntp.NewsgroupIterator	[]	[]
org.apache.commons.net.util.TrustManagerUtils	[]	[]
java.nio.file.Files	[]	[]
org.apache.commons.net.util.KeyManagerUtils$ClientKeyStore	[]	[]
java.io.PrintWriter	[]	[]
org.apache.commons.net.ftp.FTPClient$CSL	[]	[]
org.apache.commons.net.smtp.SimpleSMTPHeader	[]	[]
org.apache.commons.net.ftp.parser.VMSFTPEntryParser	['NTFTPEntryParserFuzzer', 'OS400FTPEntryParserFuzzer']	[]
org.apache.commons.net.io.CopyStreamException	[]	[]
org.apache.commons.net.ftp.parser.MVSFTPEntryParser	['NTFTPEntryParserFuzzer', 'OS400FTPEntryParserFuzzer']	[]
org.apache.commons.net.nntp.NNTPCommand	[]	[]
org.apache.commons.net.imap.IMAPSClient	[]	[]
org.apache.commons.net.discard.DiscardUDPClient	[]	[]
org.apache.commons.net.imap.IMAPClient$FETCH_ITEM_NAMES	[]	[]
org.apache.commons.net.ftp.FTPListParseEngine	[]	[]
org.apache.commons.net.io.ToNetASCIIOutputStream	[]	[]
org.apache.commons.net.tftp.TFTPWriteRequestPacket	[]	[]
org.apache.commons.net.ftp.FTPHTTPClient	[]	[]
org.apache.commons.net.io.DotTerminatedMessageReader	[]	[]
org.apache.commons.net.io.CopyStreamAdapter	[]	[]
org.apache.commons.net.ftp.FTPReply	[]	[]
org.apache.commons.net.pop3.POP3Command	[]	[]
org.apache.commons.net.imap.IMAPClient	[]	[]
org.apache.commons.net.nntp.Threader	[]	[]
org.apache.commons.net.smtp.SMTP	[]	[]
java.io.OutputStream	[]	[]
org.apache.commons.net.tftp.TFTPAckPacket	[]	[]
org.apache.commons.net.io.SocketOutputStream	[]	[]
NTFTPEntryParserFuzzer	['NTFTPEntryParserFuzzer']	[]
org.apache.commons.net.util.ListenerList	[]	[]
org.apache.commons.net.pop3.POP3SClient	[]	[]
org.apache.commons.net.pop3.POP3Client	[]	[]
org.apache.commons.net.telnet.TerminalTypeOptionHandler	[]	[]
org.apache.commons.net.telnet.TelnetCommand	[]	[]
org.apache.commons.net.ftp.FTPClient	['NTFTPEntryParserFuzzer']	[]
org.apache.commons.net.util.SubnetUtils$SubnetInfo	[]	[]
org.apache.commons.net.ftp.parser.OS2FTPEntryParser	['NTFTPEntryParserFuzzer', 'OS400FTPEntryParserFuzzer']	[]
org.apache.commons.net.ntp.NTPUDPClient	[]	[]
java.lang.ProcessBuilder	[]	[]
org.apache.commons.net.ftp.parser.FTPTimestampParserImpl	['NTFTPEntryParserFuzzer', 'OS400FTPEntryParserFuzzer']	[]
org.apache.commons.net.telnet.Telnet	[]	[]
org.apache.commons.net.io.DotTerminatedMessageWriter	[]	[]
java.io.File	[]	[]
OS400FTPEntryParserFuzzer	['OS400FTPEntryParserFuzzer']	[]
org.apache.commons.net.ProtocolCommandSupport	[]	[]
org.apache.commons.net.ntp.TimeStamp	[]	[]
org.apache.commons.net.ftp.parser.MacOsPeterFTPEntryParser	['NTFTPEntryParserFuzzer', 'OS400FTPEntryParserFuzzer']	[]
org.apache.commons.net.time.TimeTCPClient	[]	[]
MLSxEntryParserFuzzer	['MLSxEntryParserFuzzer']	[]
org.apache.commons.net.ProtocolCommandEvent	[]	[]
org.apache.commons.net.bsd.RExecClient	[]	[]
org.apache.commons.net.ftp.DeflateSocket	[]	[]
org.apache.commons.net.tftp.TFTPClient	[]	[]
org.apache.commons.net.util.Charsets	[]	[]
org.apache.commons.net.tftp.TFTPReadRequestPacket	[]	[]
org.apache.commons.net.pop3.POP3MessageInfo	[]	[]
org.apache.commons.net.io.CopyStreamEvent	[]	[]
org.apache.commons.net.nntp.NewGroupsOrNewsQuery	[]	[]
org.apache.commons.net.nntp.NNTPReply	[]	[]
org.apache.commons.net.io.FromNetASCIIOutputStream	[]	[]
org.apache.commons.net.ftp.FTPSServerSocketFactory	[]	[]
java.io.BufferedWriter	[]	[]
org.apache.commons.net.echo.EchoUDPClient	[]	[]
org.apache.commons.net.finger.FingerClient	[]	[]
org.apache.commons.net.chargen.CharGenUDPClient	[]	[]
org.apache.commons.net.ftp.parser.UnixFTPEntryParser	['NTFTPEntryParserFuzzer', 'OS400FTPEntryParserFuzzer']	[]
org.apache.commons.net.imap.IMAP	[]	[]
org.apache.commons.net.DefaultSocketFactory	[]	[]
org.apache.commons.net.bsd.RCommandClient	[]	[]
org.apache.commons.net.ftp.FTP	[]	[]
org.apache.commons.net.daytime.DaytimeTCPClient	[]	[]
org.apache.commons.net.ntp.TimeInfo	[]	[]
org.apache.commons.net.ftp.parser.MLSxEntryParser	['MLSxEntryParserFuzzer']	[]
org.apache.commons.net.ftp.parser.VMSVersioningFTPEntryParser	[]	[]
org.apache.commons.net.nntp.ArticleIterator	[]	[]
org.apache.commons.net.PrintCommandListener	[]	[]
org.apache.commons.net.ftp.FTPSTrustManager	[]	[]
org.apache.commons.net.nntp.NntpThreadContainer	[]	[]
org.apache.commons.net.util.SubnetUtils	[]	[]
org.apache.commons.net.telnet.TelnetInputStream	[]	[]
org.apache.commons.net.whois.WhoisClient	[]	[]
org.apache.commons.net.io.ToNetASCIIInputStream	[]	[]
org.apache.commons.net.ntp.NtpV3Impl	[]	[]
org.apache.commons.net.ftp.FTPCmd	[]	[]
org.apache.commons.net.telnet.TelnetOutputStream	[]	[]
org.apache.commons.net.ftp.FTPCommand	[]	[]
org.apache.commons.net.imap.IMAPReply	[]	[]
org.apache.commons.net.nntp.SimpleNNTPHeader	[]	[]
org.apache.commons.net.io.Util	[]	[]
org.apache.commons.net.io.CRLFLineReader	[]	[]
java.lang.Runtime	[]	[]
org.apache.commons.net.util.SSLContextUtils	[]	[]
org.apache.commons.net.smtp.SMTPCommand	[]	[]
org.apache.commons.net.telnet.TelnetOption	['TelnetOptionFuzzer']	[]
org.apache.commons.net.imap.IMAPClient$SEARCH_CRITERIA	[]	[]
org.apache.commons.net.imap.AuthenticatingIMAPClient	[]	[]
org.apache.commons.net.smtp.SMTPClient	[]	[]
org.apache.commons.net.imap.AuthenticatingIMAPClient$AUTH_METHOD	[]	[]
org.apache.commons.net.pop3.ExtendedPOP3Client$AUTH_METHOD	[]	[]
org.apache.commons.net.nntp.ReplyIterator	[]	[]
org.apache.commons.net.imap.IMAPClient$STATUS_DATA_ITEMS	[]	[]
org.apache.commons.net.ftp.FTPSClient	[]	[]
org.apache.commons.net.util.KeyManagerUtils$X509KeyManager	[]	[]
java.io.BufferedReader	[]	[]
org.apache.commons.net.nntp.NNTP	[]	[]
org.apache.commons.net.tftp.TFTPErrorPacket	[]	[]
org.apache.commons.net.smtp.AuthenticatingSMTPClient$AUTH_METHOD	[]	[]
java.util.concurrent.Executor	[]	[]
org.apache.commons.net.ftp.FTPClientConfig	['NTFTPEntryParserFuzzer', 'OS400FTPEntryParserFuzzer']	[]
org.apache.commons.net.imap.IMAP$IMAPState	[]	[]
org.apache.commons.net.smtp.SMTPReply	[]	[]
org.apache.commons.net.ftp.parser.DefaultFTPFileEntryParserFactory	[]	[]
org.apache.commons.net.discard.DiscardTCPClient	[]	[]
org.apache.commons.net.daytime.DaytimeUDPClient	[]	[]
org.apache.commons.net.ftp.parser.OS400FTPEntryParser	['NTFTPEntryParserFuzzer', 'OS400FTPEntryParserFuzzer']	[]
org.apache.commons.net.chargen.CharGenTCPClient	[]	[]
org.apache.commons.net.ftp.parser.CompositeFileEntryParser	[]	[]
org.apache.commons.net.util.SSLSocketUtils	[]	[]
java.nio.file.Paths	[]	[]
org.apache.commons.net.ntp.NtpUtils	[]	[]
org.apache.commons.net.io.FromNetASCIIInputStream	[]	[]
org.apache.commons.net.nntp.NNTPClient	[]	[]
org.apache.commons.net.ftp.FTPClient$NatServerResolverImpl	[]	[]
org.apache.commons.net.telnet.TelnetClient	[]	[]
org.apache.commons.net.ftp.DurationUtils	[]	[]
org.apache.commons.net.pop3.ExtendedPOP3Client	[]	[]
org.apache.commons.net.telnet.WindowSizeOptionHandler	[]	[]
org.apache.commons.net.pop3.POP3	[]	[]
org.apache.commons.net.ftp.parser.ParserInitializationException	[]	[]
Base64Fuzzer	['Base64Fuzzer']	[]
org.apache.commons.net.ftp.parser.EnterpriseUnixFTPEntryParser	[]	[]
org.apache.commons.net.ftp.parser.NetwareFTPEntryParser	['NTFTPEntryParserFuzzer', 'OS400FTPEntryParserFuzzer']	[]
org.apache.commons.net.nntp.NewsgroupInfo	[]	[]
org.apache.commons.net.telnet.InvalidTelnetOptionException	[]	[]
org.apache.commons.net.smtp.RelayPath	[]	[]
java.util.concurrent.Callable	[]	[]
java.io.InputStream	[]	[]
org.apache.commons.net.tftp.TFTP	[]	[]
org.apache.commons.net.ftp.FTPFileFilters	[]	[]
org.apache.commons.net.DefaultDatagramSocketFactory	[]	[]
org.apache.commons.net.util.KeyManagerUtils	[]	[]
org.apache.commons.net.io.SocketInputStream	[]	[]
org.apache.commons.net.bsd.RLoginClient	[]	[]
TelnetOptionFuzzer	['TelnetOptionFuzzer']	[]
org.apache.commons.net.time.TimeUDPClient	[]	[]
org.apache.commons.net.ftp.FTPSCommand	[]	[]
org.apache.commons.net.util.Base64	['Base64Fuzzer']	[]
java.lang.System	['Base64Fuzzer']	[]
org.apache.commons.net.imap.IMAPCommand	[]	[]
org.apache.commons.net.smtp.AuthenticatingSMTPClient	[]	[]
org.apache.commons.net.echo.EchoTCPClient	[]	[]
org.apache.commons.net.util.TrustManagerUtils$TrustManager	[]	[]
org.apache.commons.net.ftp.FTPSSocketFactory	[]	[]
org.apache.commons.net.ftp.parser.NTFTPEntryParser	['NTFTPEntryParserFuzzer', 'OS400FTPEntryParserFuzzer']	[]

Directories in report

Directory