Date: Mon, 16 Jan 2017 12:00:26 +0100 From: Agostino Sarubbo <ago@...too.org> To: oss-security@...ts.openwall.com Subject: jasper: invalid memory read in jas_matrix_asl (jas_seq.c) Description: jasper is an open-source initiative to provide a free software-based reference implementation of the codec specified in the JPEG-2000 Part-1 standard. Another round of fuzzing shows that a crafted image causes an invalid memory read. The complete ASan output: # imginfo -f $FILE ==26941==ERROR: AddressSanitizer: SEGV on unknown address 0x62c80000a400 (pc 0x7f28c74e48ee bp 0x7ffcececdb70 sp 0x7ffcececdaf0 T0) ==26941==The signal is caused by a READ memory access. #0 0x7f28c74e48ed in jas_matrix_asl /tmp/portage/media- libs/jasper-1.900.27/work/jasper-1.900.27/src/libjasper/base/jas_seq.c:376:11 #1 0x7f28c7545f0e in jpc_dec_tiledecode /tmp/portage/media- libs/jasper-1.900.27/work/jasper-1.900.27/src/libjasper/jpc/jpc_dec.c:1107:6 #2 0x7f28c7536cdf in jpc_dec_process_sod /tmp/portage/media- libs/jasper-1.900.27/work/jasper-1.900.27/src/libjasper/jpc/jpc_dec.c:658:7 #3 0x7f28c75406b3 in jpc_dec_decode /tmp/portage/media- libs/jasper-1.900.27/work/jasper-1.900.27/src/libjasper/jpc/jpc_dec.c:425:10 #4 0x7f28c75406b3 in jpc_decode /tmp/portage/media- libs/jasper-1.900.27/work/jasper-1.900.27/src/libjasper/jpc/jpc_dec.c:262 #5 0x7f28c74a2b84 in jas_image_decode /tmp/portage/media- libs/jasper-1.900.27/work/jasper-1.900.27/src/libjasper/base/jas_image.c:444:16 #6 0x509eed in main /tmp/portage/media- libs/jasper-1.900.27/work/jasper-1.900.27/src/appl/imginfo.c:219:16 #7 0x7f28c65aa61f in __libc_start_main /var/tmp/portage/sys- libs/glibc-2.22-r4/work/glibc-2.22/csu/libc-start.c:289 #8 0x419978 in _init (/usr/bin/imginfo+0x419978) AddressSanitizer can not provide additional info. SUMMARY: AddressSanitizer: SEGV /tmp/portage/media- libs/jasper-1.900.27/work/jasper-1.900.27/src/libjasper/base/jas_seq.c:376:11 in jas_matrix_asl ==26941==ABORTING Affected version: 1.900.27 Fixed version: N/A Commit fix: N/A Credit: This bug was discovered by Agostino Sarubbo of Gentoo. CVE: N/A Reproducer: https://github.com/asarubbo/poc/blob/master/00053-jasper-invalidread-jas_matrix_asl Timeline: 2016-11-20: bug discovered and reported upstream 2017-01-16: blog post about the issue Note: This bug was found with American Fuzzy Lop. Permalink: https://blogs.gentoo.org/ago/2017/01/16/jasper-invalid-memory-read-in-jas_matrix_asl-jas_seq-c -- Agostino
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