Package: netpbm
Version: 2:10.0-15.2
Usertags: afl
giftopnm crashes on the attached file:
$ giftopnm < crash.gif
Segmentation fault
Valgrind says it's a buffer over-read:
==7449== Invalid read of size 1
==7449== at 0x804CC90: readImageData (giftopnm.c:593)
==7449== by 0x804DAE4: convertImage (giftopnm.c:902)
==7449== by 0x804DAE4: convertImages (giftopnm.c:947)
==7449== by 0x8049121: main (giftopnm.c:982)
==7449== Address 0x6dc14bc is not stack'd, malloc'd or (recently) free'd
This bug was found using American fuzzy lop:
https://packages.debian.org/experimental/afl
Disclaimer: I don't have spare CPU cycles, so I fuzzed only till the
first crash (which took a few seconds). It's likely that extensive
fuzzing would uncover more interesting crashers. I'd encourage netpbm
maintainers to perform fuzzing with AFL on their own. :-)
-- System Information:
Debian Release: 8.0
APT prefers unstable
APT policy: (990, 'unstable'), (500, 'experimental')
Architecture: i386 (x86_64)
Foreign Architectures: amd64
Kernel: Linux 3.2.0-4-amd64 (SMP w/2 CPU cores)
Locale: LANG=C, LC_CTYPE=pl_PL.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: sysvinit (via /sbin/init)
Versions of packages netpbm depends on:
ii libc6 2.19-14
ii libjpeg62-turbo 1:1.3.1-11
ii libnetpbm10 2:10.0-15.2
ii libpng12-0 1.2.50-2+b2
ii libtiff5 4.0.3-12
ii zlib1g 1:1.2.8.dfsg-2+b1
--
Jakub Wilk
