High level conclusions

Fuzzers reach 51.79% code coverage.

Reachability and coverage overview

Functions statically reachable by fuzzers

191 / 612

Cyclomatic complexity statically reachable by fuzzers

690 / 2114

Runtime code coverage of functions

317 / 612

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	Runtime reached by Fuzzers	Combined 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: page_extraction_fuzzer

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	478	58.0%
gold	[1:9]	0	0.0%
yellow	[10:29]	0	0.0%
greenyellow	[30:49]	0	0.0%
lawngreen	50+	346	41.9%
All colors	824	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
217	504	pdfminer.pdffont.PDFFont._parse_bbox	call site: 00504	pdfminer.pdffont.PDFCIDFont.__init__
96	112	pdfminer.pdftypes.decompress_corrupted	call site: 00112	pdfminer.ccitt.ccittfaxdecode
35	724	pdfminer.utils.choplist	call site: 00724	pdfminer.pdfinterp.PDFResourceManager.get_font
19	428	pdfminer.encodingdb.name2unicode	call site: 00428	.map
17	760	pdfminer.pdfinterp.PDFResourceManager.get_font	call site: 00760	pdfminer.pdfinterp.PDFPageInterpreter.init_resources.get_colorspace
13	211	pdfminer.pdftypes.int_value	call site: 00211	pdfminer.utils.apply_tiff_predictor
12	449	pdfminer.pdffont.PDFSimpleFont.__init__	call site: 00449	pdfminer.pdftypes.PDFStream.get_data
6	0	EP	call site: 00000	pdfminer.high_level.extract_pages
5	289	pdfminer.psparser.literal_name	call site: 00289	pdfminer.pdftypes.int_value
5	413	pdfminer.pdffont.PDFSimpleFont.__init__	call site: 00413	pdfminer.encodingdb.EncodingDB.get_encoding
5	419	pdfminer.encodingdb.EncodingDB.get_encoding	call site: 00419	pdfminer.encodingdb.name2unicode
4	15	pdfminer.utils.open_filename.__init__	call site: 00015	pdfminer.converter.PDFPageAggregator.__init__

Runtime coverage analysis

Covered functions

373

Functions that are reachable but not covered

193

Reachable functions

293

Percentage of reachable functions covered

34.13%

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
/	1
...pdfminer.six.fuzzing.page_extraction_fuzzer	8
pdfminer.high_level	9
pdfminer.layout	8
pdfminer.utils	21
pdfminer.converter	12
pdfminer.pdfinterp	43
pdfminer.pdfpage	29
pdfminer.pdfparser	3
pdfminer.psparser	7
pdfminer.pdfdocument	48
pdfminer.pdftypes	31
pdfminer.lzw	12
pdfminer.ascii85	7
pdfminer.runlength	5
pdfminer.ccitt	35
pdfminer.pdfdevice	4
pdfminer.pdffont	74
pdfminer.encodingdb	17
pdfminer.cmapdb	29
pdfminer.casting	7

Fuzzer: extract_text_fuzzer

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	486	50.8%
gold	[1:9]	0	0.0%
yellow	[10:29]	0	0.0%
greenyellow	[30:49]	0	0.0%
lawngreen	50+	469	49.1%
All colors	955	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
217	502	pdfminer.pdffont.PDFFont._parse_bbox	call site: 00502	pdfminer.pdffont.PDFCIDFont.__init__
96	109	pdfminer.pdftypes.decompress_corrupted	call site: 00109	pdfminer.ccitt.ccittfaxdecode
35	722	pdfminer.utils.choplist	call site: 00722	pdfminer.pdfinterp.PDFResourceManager.get_font
19	426	pdfminer.encodingdb.name2unicode	call site: 00426	.map
17	758	pdfminer.pdfinterp.PDFResourceManager.get_font	call site: 00758	pdfminer.pdfinterp.PDFPageInterpreter.init_resources.get_colorspace
13	208	pdfminer.pdftypes.int_value	call site: 00208	pdfminer.utils.apply_tiff_predictor
12	447	pdfminer.pdffont.PDFSimpleFont.__init__	call site: 00447	pdfminer.pdftypes.PDFStream.get_data
10	823	pdfminer.layout.LTLayoutContainer.analyze	call site: 00823	obj0.is_voverlap
5	287	pdfminer.psparser.literal_name	call site: 00287	pdfminer.pdftypes.int_value
5	411	pdfminer.pdffont.PDFSimpleFont.__init__	call site: 00411	pdfminer.encodingdb.EncodingDB.get_encoding
5	417	pdfminer.encodingdb.EncodingDB.get_encoding	call site: 00417	pdfminer.encodingdb.name2unicode
4	237	pdfminer.utils.apply_png_predictor	call site: 00237	.enumerate

Runtime coverage analysis

Covered functions

373

Functions that are reachable but not covered

228

Reachable functions

347

Percentage of reachable functions covered

34.29%

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
/	1
...pdfminer.six.fuzzing.extract_text_fuzzer	7
pdfminer.high_level	10
pdfminer.layout	68
pdfminer.utils	27
pdfminer.converter	11
pdfminer.pdfinterp	43
pdfminer.pdfpage	29
pdfminer.pdfparser	3
pdfminer.psparser	7
pdfminer.pdfdocument	48
pdfminer.pdftypes	31
pdfminer.lzw	12
pdfminer.ascii85	7
pdfminer.runlength	5
pdfminer.ccitt	35
pdfminer.pdfdevice	4
pdfminer.pdffont	74
pdfminer.encodingdb	17
pdfminer.cmapdb	29
pdfminer.casting	7

Fuzzer: extract_text_to_fp_fuzzer

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	529	59.2%
gold	[1:9]	0	0.0%
yellow	[10:29]	0	0.0%
greenyellow	[30:49]	0	0.0%
lawngreen	50+	364	40.7%
All colors	893	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
217	559	pdfminer.pdffont.PDFFont._parse_bbox	call site: 00559	pdfminer.pdffont.PDFCIDFont.__init__
93	172	pdfminer.pdftypes.decompress_corrupted	call site: 00172	pdfminer.ccitt.ccittfaxdecode
41	21	pdfminer.converter.PDFConverter._is_binary_stream	call site: 00021	pdfminer.converter.HTMLConverter.__init__
34	779	pdfminer.utils.choplist	call site: 00779	pdfminer.pdfinterp.PDFResourceManager.get_font
21	871	pdfminer.converter.PDFLayoutAnalyzer.end_page	call site: 00871	pdfminer.converter.HTMLConverter.close
19	483	pdfminer.encodingdb.name2unicode	call site: 00483	.map
16	814	pdfminer.pdfinterp.PDFResourceManager.get_font	call site: 00814	pdfminer.pdfinterp.PDFPageInterpreter.init_resources.get_colorspace
13	268	pdfminer.pdftypes.int_value	call site: 00268	pdfminer.utils.apply_tiff_predictor
12	504	pdfminer.pdffont.PDFSimpleFont.__init__	call site: 00504	pdfminer.pdftypes.PDFStream.get_data
11	0	EP	call site: 00000	pdfminer.high_level.extract_text_to_fp
5	347	pdfminer.psparser.literal_name	call site: 00347	pdfminer.pdftypes.int_value
5	468	pdfminer.pdffont.PDFSimpleFont.__init__	call site: 00468	pdfminer.encodingdb.EncodingDB.get_encoding

Runtime coverage analysis

Covered functions

373

Functions that are reachable but not covered

214

Reachable functions

317

Percentage of reachable functions covered

32.49%

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
/	1
...pdfminer.six.fuzzing.extract_text_to_fp_fuzzer	11
pdfminer.high_level	16
pdfminer.image	2
pdfminer.converter	31
pdfminer.pdfdevice	5
pdfminer.pdfinterp	41
pdfminer.pdfpage	29
pdfminer.pdfparser	3
pdfminer.psparser	7
pdfminer.pdfdocument	53
pdfminer.casting	8
pdfminer.pdftypes	31
pdfminer.lzw	12
pdfminer.ascii85	7
pdfminer.runlength	5
pdfminer.ccitt	32
pdfminer.utils	17
pdfminer.layout	6
pdfminer.pdffont	75
pdfminer.encodingdb	17
pdfminer.cmapdb	29

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
pdfminer.converter.HTMLConverter.receive_layout.render	pdfminer.converter	1	['N/A']	6	0	24	15	9	75	2	244	196
pdfminer.psparser.PSStackParser.nextobject	pdfminer.psparser	1	['N/A']	3	0	15	13	8	48	0	167	127
pdfminer.pdfdocument.PDFStandardSecurityHandlerV5.authenticate	pdfminer.pdfdocument	2	['N/A', 'N/A']	3	0	0	2	4	26	0	85	82
pdfminer.pdfinterp.PDFPageInterpreter.do_TJ	pdfminer.pdfinterp	2	['N/A', 'N/A']	4	0	2	2	4	31	3	103	64
pdfminer.pdfinterp.PDFPageInterpreter.do_Do	pdfminer.pdfinterp	2	['N/A', 'N/A']	6	0	8	3	4	41	0	131	52
pdfminer.cmapdb.CMapParser.do_keyword	pdfminer.cmapdb	3	['N/A', 'N/A', 'N/A']	4	0	27	29	15	51	0	179	42
pdfminer.pdfdocument.PageLabels.labels	pdfminer.pdfdocument	1	['N/A']	3	0	2	3	4	24	0	82	41
pdfminer.pdfdocument.PDFDocument.getobj	pdfminer.pdfdocument	2	['N/A', 'N/A']	8	0	4	6	5	107	2	367	40

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

Functions statically reachable by fuzzers

295 / 612

Cyclomatic complexity statically reachable by fuzzers

1077 / 2114

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	Runtime reached by Fuzzers	Combined 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.

fuzzing/page_extraction_fuzzer.py

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=['pdfminer.pdffont.PDFFont._parse_bbox', 'pdfminer.pdftypes.decompress_corrupted', 'pdfminer.utils.choplist', 'pdfminer.encodingdb.name2unicode', 'pdfminer.pdfinterp.PDFResourceManager.get_font', 'pdfminer.pdftypes.int_value', 'pdfminer.pdffont.PDFSimpleFont.__init__', 'pdfminer.psparser.literal_name']

fuzzing/extract_text_fuzzer.py

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=['pdfminer.pdffont.PDFFont._parse_bbox', 'pdfminer.pdftypes.decompress_corrupted', 'pdfminer.utils.choplist', 'pdfminer.encodingdb.name2unicode', 'pdfminer.pdfinterp.PDFResourceManager.get_font', 'pdfminer.pdftypes.int_value', 'pdfminer.pdffont.PDFSimpleFont.__init__', 'pdfminer.layout.LTLayoutContainer.analyze', 'pdfminer.psparser.literal_name']

fuzzing/extract_text_to_fp_fuzzer.py

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=['pdfminer.pdffont.PDFFont._parse_bbox', 'pdfminer.pdftypes.decompress_corrupted', 'pdfminer.converter.PDFConverter._is_binary_stream', 'pdfminer.utils.choplist', 'pdfminer.converter.PDFLayoutAnalyzer.end_page', 'pdfminer.encodingdb.name2unicode', 'pdfminer.pdfinterp.PDFResourceManager.get_font', 'pdfminer.pdftypes.int_value', 'pdfminer.pdffont.PDFSimpleFont.__init__']

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
pdfminer.converter.HTMLConverter.receive_layout.render	50	0	0.0%	[]
pdfminer.converter.XMLConverter.receive_layout.render	54	0	0.0%	[]
pdfminer.converter.HOCRConverter.receive_layout.render	36	0	0.0%	[]
pdfminer.pdffont.getdict	41	2	4.878%	['page_extraction_fuzzer', 'extract_text_to_fp_fuzzer', 'extract_text_fuzzer']
pdfminer.pdffont.CFFFont.__init__	58	0	0.0%	[]
pdfminer.pdffont.TrueTypeFont.create_unicode_map	34	0	0.0%	['page_extraction_fuzzer', 'extract_text_to_fp_fuzzer', 'extract_text_fuzzer']
pdfminer.pdffont.PDFCIDFont.__init__	50	0	0.0%	['page_extraction_fuzzer', 'extract_text_to_fp_fuzzer', 'extract_text_fuzzer']
pdfminer.cmapdb.CMapParser.do_keyword	119	0	0.0%	[]
d.decompress	189	25	13.22%	['page_extraction_fuzzer', 'extract_text_to_fp_fuzzer', 'extract_text_fuzzer']
pdfminer.fontmetrics.convert_font_metrics	46	13	28.26%	['page_extraction_fuzzer', 'extract_text_to_fp_fuzzer', 'extract_text_fuzzer']
i.save	214	16	7.476%	['page_extraction_fuzzer', 'extract_text_to_fp_fuzzer', 'extract_text_fuzzer']
pdfminer.jbig2.JBIG2StreamWriter.encode_retention_flags	32	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
	[]	[]
pdfminer.pdffont	['page_extraction_fuzzer', 'extract_text_fuzzer', 'extract_text_to_fp_fuzzer']	[]
logging	[]	[]
pdfminer.fontmetrics	[]	[]
pdfminer.utils	['page_extraction_fuzzer', 'extract_text_fuzzer', 'extract_text_to_fp_fuzzer']	[]
io	[]	[]
hashlib	[]	[]
itertools	[]	[]
pdfminer.encodingdb	['page_extraction_fuzzer', 'extract_text_fuzzer', 'extract_text_to_fp_fuzzer']	[]
re	[]	[]
stringprep	[]	[]
collections	[]	[]
pdfminer.pdfparser	['page_extraction_fuzzer', 'extract_text_fuzzer', 'extract_text_to_fp_fuzzer']	[]
pdfminer.high_level	['page_extraction_fuzzer', 'extract_text_fuzzer', 'extract_text_to_fp_fuzzer']	[]
pdfminer.image	['extract_text_to_fp_fuzzer']	[]
fuzzing	[]	[]
pdfminer.jbig2	[]	[]
os	[]	[]
pdfminer.settings	[]	[]
contextlib	[]	[]
pdfminer.glyphlist	[]	[]
pdfminer.runlength	['page_extraction_fuzzer', 'extract_text_fuzzer', 'extract_text_to_fp_fuzzer']	[]
pdfminer.ascii85	['page_extraction_fuzzer', 'extract_text_fuzzer', 'extract_text_to_fp_fuzzer']	[]
unicodedata	[]	[]
importlib	[]	[]
pdfminer.pdfpage	['page_extraction_fuzzer', 'extract_text_fuzzer', 'extract_text_to_fp_fuzzer']	[]
cryptography	[]	[]
pdfminer.casting	['page_extraction_fuzzer', 'extract_text_fuzzer', 'extract_text_to_fp_fuzzer']	[]
typing	[]	[]
pdfminer.converter	['page_extraction_fuzzer', 'extract_text_fuzzer', 'extract_text_to_fp_fuzzer']	[]
pdfminer.pdfdevice	['page_extraction_fuzzer', 'extract_text_fuzzer', 'extract_text_to_fp_fuzzer']	[]
pdfminer.psexceptions	[]	[]
charset_normalizer	[]	[]
pdfminer._saslprep	[]	[]
pdfminer.pdfexceptions	[]	[]
pdfminer.cmapdb	['page_extraction_fuzzer', 'extract_text_fuzzer', 'extract_text_to_fp_fuzzer']	[]
pdfminer.pdfdocument	['page_extraction_fuzzer', 'extract_text_fuzzer', 'extract_text_to_fp_fuzzer']	[]
zlib	[]	[]
heapq	[]	[]
pdfminer.arcfour	[]	[]
pdfminer.data_structures	[]	[]
pygame	[]	[]
json	[]	[]
...pdfminer.six.fuzzing.page_extraction_fuzzer	['page_extraction_fuzzer']	[]
html	[]	[]
pdfminer.psparser	['page_extraction_fuzzer', 'extract_text_fuzzer', 'extract_text_to_fp_fuzzer']	[]
...pdfminer.six.fuzzing.extract_text_fuzzer	['extract_text_fuzzer']	[]
pdfminer.latin_enc	[]	[]
pdfminer.pdfinterp	['page_extraction_fuzzer', 'extract_text_fuzzer', 'extract_text_to_fp_fuzzer']	[]
pdfminer.pdfcolor	[]	[]
pdfminer.ccitt	['page_extraction_fuzzer', 'extract_text_fuzzer', 'extract_text_to_fp_fuzzer']	[]
binascii	[]	[]
math	[]	[]
unittest	[]	[]
base64	[]	[]
pdfminer.pdftypes	['page_extraction_fuzzer', 'extract_text_fuzzer', 'extract_text_to_fp_fuzzer']	[]
PIL	[]	[]
pdfminer.lzw	['page_extraction_fuzzer', 'extract_text_fuzzer', 'extract_text_to_fp_fuzzer']	[]
gzip	[]	[]
	[]	[]
atheris	[]	[]
struct	[]	[]
pdfminer	[]	[]
warnings	[]	[]
array	[]	[]
pdfminer.layout	['page_extraction_fuzzer', 'extract_text_fuzzer', 'extract_text_to_fp_fuzzer']	[]
...pdfminer.six.fuzzing.extract_text_to_fp_fuzzer	['extract_text_to_fp_fuzzer']	[]

Directories in report

Directory