W dniu 19.11.2015 o 19:32, Jacek Wielemborek pisze: > W dniu 19.11.2015 o 11:25, Sandro Santilli pisze: >> gnash -r2 - > > Thanks! I managed to use it with AFL really quickly and already found > one crash:
Whoops, looks like I should have used attachments instead - I attach the console log and the Dockerfile. Let me know if you need any more help. Cheers, d33tah
root@35efc6731a98:~/fuzz-results/gnash/o# ~/bin/cwdump crashwalk.db | grep
'^---END SUMM' -B100 -m1
(1 of 1) - Hash:
47324d551634e903129adabc0f2f2909.51b353dc0dc7f9cdadf1640fc091b5f1
---CRASH SUMMARY---
Filename: 3341/crashes/id:000016,sig:06,src:000017,op:havoc,rep:8
SHA1: 59ea5ed070fed44c99af23a2f198c55c06daac9d
Classification: EXPLOITABLE
Hash: 47324d551634e903129adabc0f2f2909.51b353dc0dc7f9cdadf1640fc091b5f1
Command: gtk-gnash -r 2 -
Faulting Frame:
gnash::SWFStream::read_sint @ 0x00007ffff750ff1b: in
/usr/lib/gnash/libgnashcore-0.8.11.so
Disassembly:
Stack Head (14 entries):
raise @ 0x00007ffff3bcf107: in
/lib/x86_64-linux-gnu/libc-2.19.so (BL)
abort @ 0x00007ffff3bd04e8: in
/lib/x86_64-linux-gnu/libc-2.19.so (BL)
None @ 0x00007ffff3bc8226: in
/lib/x86_64-linux-gnu/libc-2.19.so (BL)
__assert_fail @ 0x00007ffff3bc82d2: in
/lib/x86_64-linux-gnu/libc-2.19.so (BL)
gnash::SWFStream::read_si @ 0x00007ffff750ff1b: in
/usr/lib/gnash/libgnashcore-0.8.11.so
gnash::SWF::TextRecord::r @ 0x00007ffff739acfe: in
/usr/lib/gnash/libgnashcore-0.8.11.so
gnash::SWF::DefineTextTag @ 0x00007ffff72edd30: in
/usr/lib/gnash/libgnashcore-0.8.11.so
gnash::SWF::DefineTextTag @ 0x00007ffff72f0414: in
/usr/lib/gnash/libgnashcore-0.8.11.so
gnash::SWF::DefineText2Ta @ 0x00007ffff72f0414: in
/usr/lib/gnash/libgnashcore-0.8.11.so
gnash::SWFParser::read @ 0x00007ffff7a17ad6: in
/usr/lib/gnash/libgnashcore-0.8.11.so
gnash::SWFMovieDefinition @ 0x00007ffff7a4b2f8: in
/usr/lib/gnash/libgnashcore-0.8.11.so
None @ 0x00007ffff442d5c0: in
/usr/lib/x86_64-linux-gnu/libstdc++.so.6.0.21
start_thread @ 0x00007ffff3f4b0a4: in
/lib/x86_64-linux-gnu/libpthread-2.19.so
clone @ 0x00007ffff3c8006d: in
/lib/x86_64-linux-gnu/libc-2.19.so (BL)
Registers:
rax=0x0000000000000000 rbx=0x00007ffff7fec000 rcx=0x00007ffff3bcf107
rdx=0x0000000000000006
rsi=0x0000000000006e6f rdi=0x00000000000062a3 rbp=0x00007ffff3cfed08
rsp=0x00007fffdcbfdb88
r8=0x00007fffd8000930 r9=0x00007fffd8000070 r10=0x0000000000000008
r11=0x0000000000000206
r12=0x00007ffff7b23b78 r13=0x00007ffff7b243c0 r14=0x0000000000000021
r15=0x0000000000000046
rip=0x00007ffff3bcf107 efl=0x0000000000000206 cs=0x0000000000000033
ss=0x000000000000002b
ds=0x0000000000000000 es=0x0000000000000000 fs=0x0000000000000000
gs=0x0000000000000000
Extra Data:
Description: Possible stack corruption
Short description: PossibleStackCorruption (7/22)
Explanation: GDB generated an error while unwinding the stack and/or the
stack contained return addresses that were not mapped in the inferior's process
address space and/or the stack pointer is pointing to a location outside the
default stack region. These conditions likely indicate stack corruption, which
is generally considered exploitable.
---END SUMMARY---
root@35efc6731a98:~/fuzz-results/gnash/o# gtk-gnash -r 2 - <
8249/crashes/id:000024,sig:06,src:000219+000238,op:splice,rep:2
ALSA lib confmisc.c:768:(parse_card) cannot find card '0'
ALSA lib conf.c:4260:(_snd_config_evaluate) function snd_func_card_driver
returned error: No such file or directory
ALSA lib confmisc.c:392:(snd_func_concat) error evaluating strings
ALSA lib conf.c:4260:(_snd_config_evaluate) function snd_func_concat returned
error: No such file or directory
ALSA lib confmisc.c:1251:(snd_func_refer) error evaluating name
ALSA lib conf.c:4260:(_snd_config_evaluate) function snd_func_refer returned
error: No such file or directory
ALSA lib conf.c:4739:(snd_config_expand) Evaluate error: No such file or
directory
ALSA lib pcm.c:2267:(snd_pcm_open_noupdate) Unknown PCM default
gtk-gnash: ../../libbase/GnashImageGif.cpp:151: virtual void
gnash::image::{anonymous}::GifInput::readScanline(unsigned char*): Assertion
`colormap' failed.
Aborted (core dumped)
root@35efc6731a98:~/fuzz-results/gnash/o# base64
8249/crashes/id:000024,sig:06,src:000219+000238,op:splice,rep:2
R0lGIAEYgCHpAwgICCw6BwEAAAABAEkgAC0sLAD/gAD/JDKyFROM d33tah/afl-sid RUN aflize gnash RUN dpkg -i ~/pkgs/* RUN apt-get -f install -y RUN mkdir i # Note to mailing list: below has to be in one line RUN echo 'Q1dTCOgwAAB42t06+3tcxXVnd+/ujiTLNopBGK9dUVywKXHMIyU4tixZz41Xd927Akwdul2t7kqLV7vK7l1bDuEZCI+kxkmL8CMGGtq0CSmEQto0bdP3OymtbQxtSELIA1L6F/SHquecmbk7V9qV7H5fv69f9X2enTlz5pwz5zU=' | base64 -d > i/1 # The line above ended before # ENTRYPOINT afl-fuzz-parallel -i i -o o -m none -- gtk-gnash -r 2 -
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