W dniu 07.09.2015 o 13:02, Jacek d33tah Wielemborek pisze: > Source: cpio > Severity: important > > Dear Maintainer, > > I built CPIO 2.11+dfsg (with Debian patches) and fuzzed it using > afl-fuzz with address sanitizer turned on. Here's an example crash I got > with base64-encoded archive "EAEBcceSlAFxx5KSkpIAQJKSx5IBcccAAJKSAECSkgA=": > > root@1442a2c3a089:~/fuzz/cpio# /root/pkg/cpio-2.11+dfsg/obj/src/cpio > -idmv < > o/crashes/id\:000000\,sig\:06\,src\:000011\,op\:int16\,pos\:23\,val\:+0 > /root/pkg/cpio-2.11+dfsg/obj/src/cpio: warning: skipped 3 bytes of junk > /root/pkg/cpio-2.11+dfsg/obj/src/cpio: warning: archive header has > reverse byte-order > ================================================================= > ==20289==ERROR: AddressSanitizer: heap-buffer-overflow on address > 0x60200000efd1 at pc 0x7f80edb61988 bp 0x7fff7dc9cbd0 sp 0x7fff7dc9c380 > READ of size 1 at 0x60200000efd1 thread T0 > #0 0x7f80edb61987 in strchr > (/usr/lib/x86_64-linux-gnu/libasan.so.2+0x6e987) > #1 0x417e48 in path_contains_symlink ../../src/copyin.c:718 > #2 0x417e48 in process_copy_in ../../src/copyin.c:1522 > #3 0x404a6b in main ../../src/main.c:746 > #4 0x7f80ed76bb44 in __libc_start_main > (/lib/x86_64-linux-gnu/libc.so.6+0x21b44) > #5 0x40661a (/root/pkg/cpio-2.11+dfsg/obj/src/cpio+0x40661a) > > 0x60200000efd1 is located 0 bytes to the right of 1-byte region > [0x60200000efd0,0x60200000efd1) > allocated by thread T0 here: > #0 0x7f80edb8737a in malloc > (/usr/lib/x86_64-linux-gnu/libasan.so.2+0x9437a) > #1 0x4b0c84 in xmalloc ../../gnu/xmalloc.c:47 > > SUMMARY: AddressSanitizer: heap-buffer-overflow ??:0 strchr > Shadow bytes around the buggy address: > 0x0c047fff9da0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa > 0x0c047fff9db0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa > 0x0c047fff9dc0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa > 0x0c047fff9dd0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa > 0x0c047fff9de0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa > =>0x0c047fff9df0: fa fa fa fa fa fa fa fa fa fa[01]fa fa fa 05 fa > 0x0c047fff9e00: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa > 0x0c047fff9e10: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa > 0x0c047fff9e20: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa > 0x0c047fff9e30: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa > 0x0c047fff9e40: 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 > Heap right redzone: fb > Freed heap region: fd > Stack left redzone: f1 > Stack mid redzone: f2 > Stack right redzone: f3 > Stack partial redzone: f4 > 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 > ==20289==ABORTING > > -- System Information: > Debian Release: stretch/sid > APT prefers unstable > APT policy: (500, 'unstable') > Architecture: amd64 (x86_64) > > Kernel: Linux 4.1.5-100.fc21.x86_64 (SMP w/8 CPU cores) > Locale: LANG=C, LC_CTYPE=C (charmap=ANSI_X3.4-1968) > Shell: /bin/sh linked to /bin/dash > Init: unable to detect >
I attach more crashes.
cpio-2.11+dfsg-afl-fuzz-asan.tar.gz
Description: application/gzip
signature.asc
Description: OpenPGP digital signature
