Package: jbigkit Version: 2.1 Casper Sun slei.cas...@gmail.com
> On Sep 6, 2020, at 12:12 AM, Casper Sun <slei.cas...@gmail.com> wrote: > > Hi, > > Libjbig version 2.1 has a heap overflow vulnerability in jbg_newlen in jbig.c. > > Stack trace: > ``` > ==65175==ERROR: AddressSanitizer: heap-buffer-overflow on address > 0x6040000000b3 at pc 0x000000515757 bp 0x7fffffffdb20 sp 0x7fffffffdb18 > READ of size 1 at 0x6040000000b3 thread T0 > #0 0x515756 in jbg_newlen > /home/casper/targets/struct/libjbig/afl/BUILD/libjbig/jbig.c:3278:16 > #1 0x4f03bd in main > /home/casper/targets/struct/libjbig/afl/BUILD/pbmtools/jbgtopbm.c:394:14 > #2 0x7ffff6e24b96 in __libc_start_main > /build/glibc-2ORdQG/glibc-2.27/csu/../csu/libc-start.c:310 > #3 0x41ae99 in _start > (/home/casper/targets/struct/libjbig/afl/fuzzrun/jbgtopbm+0x41ae99) > > 0x6040000000b3 is located 0 bytes to the right of 35-byte region > [0x604000000090,0x6040000000b3) > allocated by thread T0 here: > #0 0x4a7de8 in realloc > /home/casper/fuzz/fuzzdeps/llvm-9.0.0.src/projects/compiler-rt/lib/asan/asan_malloc_linux.cc:164 > #1 0x4ec0d6 in read_file > /home/casper/targets/struct/libjbig/afl/BUILD/pbmtools/jbgtopbm.c:78:28 > > SUMMARY: AddressSanitizer: heap-buffer-overflow > /home/casper/targets/struct/libjbig/afl/BUILD/libjbig/jbig.c:3278:16 in > jbg_newlen > Shadow bytes around the buggy address: > 0x0c087fff7fc0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 > 0x0c087fff7fd0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 > 0x0c087fff7fe0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 > 0x0c087fff7ff0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 > 0x0c087fff8000: fa fa fd fd fd fd fd fd fa fa 00 00 00 00 00 05 > =>0x0c087fff8010: fa fa 00 00 00 00[03]fa fa fa fa fa fa fa fa fa > 0x0c087fff8020: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa > 0x0c087fff8030: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa > 0x0c087fff8040: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa > 0x0c087fff8050: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa > 0x0c087fff8060: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa > Shadow byte legend (one shadow byte represents 8 application bytes): > Addressable: 00 > Partially addressable: 01 02 03 04 05 06 07 > Heap left redzone: fa > Freed heap region: fd > Stack left redzone: f1 > Stack mid redzone: f2 > Stack right redzone: f3 > Stack after return: f5 > Stack use after scope: f8 > Global redzone: f9 > Global init order: f6 > Poisoned by user: f7 > Container overflow: fc > Array cookie: ac > Intra object redzone: bb > ASan internal: fe > Left alloca redzone: ca > Right alloca redzone: cb > Shadow gap: cc > ``` > > Reproduce steps: > 1. Compile libjbig with as an > 2. Run command line `./jbgtopbm poc` > > <poc> > > > Best regards, > Casper > >
