High level conclusions

Fuzzers reach 63.11% code coverage.

Reachability and coverage overview

Functions statically reachable by fuzzers

181 / 610

Cyclomatic complexity statically reachable by fuzzers

657 / 2107

Runtime code coverage of functions

385 / 610

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: 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	299	37.8%
gold	[1:9]	0	0.0%
yellow	[10:29]	0	0.0%
greenyellow	[30:49]	0	0.0%
lawngreen	50+	490	62.1%
All colors	789	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
93	109	pdfminer.pdftypes.decompress_corrupted	call site: 00109	pdfminer.ccitt.ccittfaxdecode
88	580	pdfminer.pdffont.PDFCIDFont.__init__	call site: 00580	pdfminer.pdftypes.PDFStream.get_data
27	497	pdfminer.pdffont.PDFFont._parse_bbox	call site: 00497	pdfminer.pdffont.PDFType1Font.__init__
12	706	pdfminer.pdffont.PDFCIDFont.__init__	call site: 00706	pdfminer.pdftypes.resolve1
8	423	pdfminer.encodingdb.name2unicode	call site: 00423	typing.cast.strip
8	691	pdfminer.utils.choplist	call site: 00691	.enumerate
6	432	pdfminer.encodingdb.name2unicode	call site: 00432	typing.cast.strip
4	359	pdfminer.utils.apply_matrix_rect	call site: 00359	.min
4	372	pdfminer.pdfinterp.PDFPageInterpreter.process_page	call site: 00372	pdfminer.pdfdevice.TagExtractor._write
4	546	pdfminer.pdffont.PDFCIDFont.get_cmap_from_spec	call site: 00546	pdfminer.cmapdb.CMapBase.__init__
4	784	pdfminer.high_level.extract_text	call site: 00784	fuzzing.fuzzed_data_provider.PdfminerFuzzedDataProvider.ConsumeMemoryFile
3	0	EP	call site: 00000	pdfminer.high_level.extract_text

Runtime coverage analysis

Covered functions

447

Functions that are reachable but not covered

170

Reachable functions

285

Percentage of reachable functions covered

40.35%

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	8
pdfminer.utils	21
pdfminer.converter	11
pdfminer.pdfinterp	41
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	32
pdfminer.pdfdevice	4
pdfminer.pdffont	69
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	383	38.8%
gold	[1:9]	0	0.0%
yellow	[10:29]	0	0.0%
greenyellow	[30:49]	0	0.0%
lawngreen	50+	602	61.1%
All colors	985	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
93	153	pdfminer.pdftypes.decompress_corrupted	call site: 00153	pdfminer.ccitt.ccittfaxdecode
88	625	pdfminer.pdffont.PDFCIDFont.__init__	call site: 00625	pdfminer.pdftypes.PDFStream.get_data
41	21	pdfminer.converter.PDFConverter._is_binary_stream	call site: 00021	pdfminer.converter.HTMLConverter.__init__
27	542	pdfminer.pdffont.PDFFont._parse_bbox	call site: 00542	pdfminer.pdffont.PDFType1Font.__init__
21	963	pdfminer.converter.PDFLayoutAnalyzer.end_page	call site: 00963	pdfminer.converter.HTMLConverter.close
12	751	pdfminer.pdffont.PDFCIDFont.__init__	call site: 00751	pdfminer.pdftypes.resolve1
11	0	EP	call site: 00000	pdfminer.high_level.extract_text_to_fp
10	837	pdfminer.layout.LTLayoutContainer.analyze	call site: 00837	obj0.is_voverlap
8	468	pdfminer.encodingdb.name2unicode	call site: 00468	typing.cast.strip
8	736	pdfminer.utils.choplist	call site: 00736	.enumerate
6	477	pdfminer.encodingdb.name2unicode	call site: 00477	typing.cast.strip
4	397	pdfminer.pdfinterp.PDFPageInterpreter.process_page	call site: 00397	pdfminer.pdfdevice.TagExtractor._write

Runtime coverage analysis

Covered functions

447

Functions that are reachable but not covered

222

Reachable functions

361

Percentage of reachable functions covered

38.5%

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	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	32
pdfminer.utils	23
pdfminer.layout	67
pdfminer.pdffont	68
pdfminer.encodingdb	17
pdfminer.cmapdb	29
pdfminer.casting	7

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	310	39.2%
gold	[1:9]	0	0.0%
yellow	[10:29]	0	0.0%
greenyellow	[30:49]	0	0.0%
lawngreen	50+	479	60.7%
All colors	789	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
93	112	pdfminer.pdftypes.decompress_corrupted	call site: 00112	pdfminer.ccitt.ccittfaxdecode
88	581	pdfminer.pdffont.PDFCIDFont.__init__	call site: 00581	pdfminer.pdftypes.PDFStream.get_data
27	498	pdfminer.pdffont.PDFFont._parse_bbox	call site: 00498	pdfminer.pdffont.PDFType1Font.__init__
12	707	pdfminer.pdffont.PDFCIDFont.__init__	call site: 00707	pdfminer.pdftypes.resolve1
8	424	pdfminer.encodingdb.name2unicode	call site: 00424	typing.cast.strip
8	692	pdfminer.utils.choplist	call site: 00692	.enumerate
6	0	EP	call site: 00000	pdfminer.high_level.extract_pages
6	433	pdfminer.encodingdb.name2unicode	call site: 00433	typing.cast.strip
4	15	pdfminer.utils.open_filename.__init__	call site: 00015	pdfminer.converter.PDFPageAggregator.__init__
4	360	pdfminer.utils.apply_matrix_rect	call site: 00360	.min
4	373	pdfminer.pdfinterp.PDFPageInterpreter.process_page	call site: 00373	pdfminer.pdfdevice.TagExtractor._write
4	547	pdfminer.pdffont.PDFCIDFont.get_cmap_from_spec	call site: 00547	pdfminer.cmapdb.CMapBase.__init__

Runtime coverage analysis

Covered functions

447

Functions that are reachable but not covered

170

Reachable functions

286

Percentage of reachable functions covered

40.56%

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	41
pdfminer.pdfpage	29
pdfminer.pdfparser	3
pdfminer.psparser	7
pdfminer.pdfdocument	47
pdfminer.pdftypes	31
pdfminer.lzw	12
pdfminer.ascii85	7
pdfminer.runlength	5
pdfminer.ccitt	32
pdfminer.pdfdevice	4
pdfminer.pdffont	69
pdfminer.encodingdb	17
pdfminer.cmapdb	29
pdfminer.casting	7

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	49	0	170	130
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	30	3	100	61
pdfminer.pdfinterp.PDFPageInterpreter.do_Do	pdfminer.pdfinterp	2	['N/A', 'N/A']	6	0	8	3	4	41	0	131	52
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']	6	0	4	6	5	105	2	361	40
pdfminer.cmapdb.CMapParser.do_keyword	pdfminer.cmapdb	3	['N/A', 'N/A', 'N/A']	4	0	27	29	15	50	0	176	39

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

Functions statically reachable by fuzzers

282 / 610

Cyclomatic complexity statically reachable by fuzzers

1035 / 2107

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/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.pdftypes.decompress_corrupted', 'pdfminer.pdffont.PDFCIDFont.__init__', 'pdfminer.pdffont.PDFFont._parse_bbox', 'pdfminer.encodingdb.name2unicode', 'pdfminer.utils.choplist', 'pdfminer.utils.apply_matrix_rect', 'pdfminer.pdfinterp.PDFPageInterpreter.process_page', 'pdfminer.pdffont.PDFCIDFont.get_cmap_from_spec']

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.pdftypes.decompress_corrupted', 'pdfminer.pdffont.PDFCIDFont.__init__', 'pdfminer.converter.PDFConverter._is_binary_stream', 'pdfminer.pdffont.PDFFont._parse_bbox', 'pdfminer.converter.PDFLayoutAnalyzer.end_page', 'pdfminer.layout.LTLayoutContainer.analyze', 'pdfminer.encodingdb.name2unicode', 'pdfminer.utils.choplist']

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.pdftypes.decompress_corrupted', 'pdfminer.pdffont.PDFCIDFont.__init__', 'pdfminer.pdffont.PDFFont._parse_bbox', 'pdfminer.encodingdb.name2unicode', 'pdfminer.utils.choplist', 'pdfminer.utils.open_filename.__init__', 'pdfminer.utils.apply_matrix_rect']

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	68	7	10.29%	['page_extraction_fuzzer', 'extract_text_to_fp_fuzzer', 'extract_text_fuzzer']
pdfminer.cmapdb.CMapParser.do_keyword	119	43	36.13%	['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']
d.items	189	25	13.22%	['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.fontmetrics	[]	[]
pdfminer.lzw	['extract_text_fuzzer', 'extract_text_to_fp_fuzzer', 'page_extraction_fuzzer']	[]
...pdfminer.six.fuzzing.page_extraction_fuzzer	['page_extraction_fuzzer']	[]
re	[]	[]
pdfminer.pdfdocument	['extract_text_fuzzer', 'extract_text_to_fp_fuzzer', 'page_extraction_fuzzer']	[]
cryptography	[]	[]
array	[]	[]
pdfminer.pdffont	['extract_text_fuzzer', 'extract_text_to_fp_fuzzer', 'page_extraction_fuzzer']	[]
atheris	[]	[]
zlib	[]	[]
gzip	[]	[]
pdfminer.settings	[]	[]
pdfminer.image	['extract_text_to_fp_fuzzer']	[]
pdfminer.pdfcolor	[]	[]
hashlib	[]	[]
pdfminer.casting	['extract_text_fuzzer', 'extract_text_to_fp_fuzzer', 'page_extraction_fuzzer']	[]
heapq	[]	[]
pdfminer.jbig2	[]	[]
pdfminer.data_structures	[]	[]
pdfminer.pdfexceptions	[]	[]
typing	[]	[]
pygame	[]	[]
json	[]	[]
pdfminer.glyphlist	[]	[]
contextlib	[]	[]
logging	[]	[]
itertools	[]	[]
pdfminer.high_level	['extract_text_fuzzer', 'extract_text_to_fp_fuzzer', 'page_extraction_fuzzer']	[]
...pdfminer.six.fuzzing.extract_text_to_fp_fuzzer	['extract_text_to_fp_fuzzer']	[]
pdfminer.pdfpage	['extract_text_fuzzer', 'extract_text_to_fp_fuzzer', 'page_extraction_fuzzer']	[]
unittest	[]	[]
PIL	[]	[]
binascii	[]	[]
math	[]	[]
stringprep	[]	[]
pdfminer.ascii85	['extract_text_fuzzer', 'extract_text_to_fp_fuzzer', 'page_extraction_fuzzer']	[]
pdfminer	[]	[]
fuzzing	[]	[]
pdfminer.pdfdevice	['extract_text_fuzzer', 'extract_text_to_fp_fuzzer', 'page_extraction_fuzzer']	[]
pdfminer.psexceptions	[]	[]
pdfminer.psparser	['extract_text_fuzzer', 'extract_text_to_fp_fuzzer', 'page_extraction_fuzzer']	[]
base64	[]	[]
charset_normalizer	[]	[]
collections	[]	[]
pdfminer.runlength	['extract_text_fuzzer', 'extract_text_to_fp_fuzzer', 'page_extraction_fuzzer']	[]
pdfminer.arcfour	[]	[]
pdfminer.latin_enc	[]	[]
...pdfminer.six.fuzzing.extract_text_fuzzer	['extract_text_fuzzer']	[]
pdfminer.pdfinterp	['extract_text_fuzzer', 'extract_text_to_fp_fuzzer', 'page_extraction_fuzzer']	[]
warnings	[]	[]
pdfminer.converter	['extract_text_fuzzer', 'extract_text_to_fp_fuzzer', 'page_extraction_fuzzer']	[]
pdfminer._saslprep	[]	[]
struct	[]	[]
pdfminer.pdfparser	['extract_text_fuzzer', 'extract_text_to_fp_fuzzer', 'page_extraction_fuzzer']	[]
importlib	[]	[]
pdfminer.layout	['extract_text_fuzzer', 'extract_text_to_fp_fuzzer', 'page_extraction_fuzzer']	[]
pdfminer.ccitt	['extract_text_fuzzer', 'extract_text_to_fp_fuzzer', 'page_extraction_fuzzer']	[]
io	[]	[]
html	[]	[]
pdfminer.cmapdb	['extract_text_fuzzer', 'extract_text_to_fp_fuzzer', 'page_extraction_fuzzer']	[]
unicodedata	[]	[]
os	[]	[]
pdfminer.pdftypes	['extract_text_fuzzer', 'extract_text_to_fp_fuzzer', 'page_extraction_fuzzer']	[]
pdfminer.encodingdb	['extract_text_fuzzer', 'extract_text_to_fp_fuzzer', 'page_extraction_fuzzer']	[]
pdfminer.utils	['extract_text_fuzzer', 'extract_text_to_fp_fuzzer', 'page_extraction_fuzzer']	[]

Directories in report

Directory