Your message dated Wed, 29 Nov 2023 18:47:19 +0000 with message-id <e1r8pah-0038mz...@fasolo.debian.org> and subject line Bug#1055019: Removed package(s) from unstable has caused the Debian Bug report #881138, regarding ffmpeg2theora: use uninitialized stack value as a pointer while running ffmpeg2theora to be marked as done.
This means that you claim that the problem has been dealt with. If this is not the case it is now your responsibility to reopen the Bug report if necessary, and/or fix the problem forthwith. (NB: If you are a system administrator and have no idea what this message is talking about, this may indicate a serious mail system misconfiguration somewhere. Please contact ow...@bugs.debian.org immediately.) -- 881138: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=881138 Debian Bug Tracking System Contact ow...@bugs.debian.org with problems
--- Begin Message ---Package: ffmpeg2theora Version: 0.30-1+b2 Severity: important Tags: security use uninitialized stack value as a pointer while running ffmpeg2theora with "poc" option Running 'ffmpeg2theora poc' with the attached file uses uninitialized stack value as a pointer which may allow a remote attacker to cause unspecified impact including denial-of-service attack I expected the program to terminate without segfault, but the program crashes as follow ------------------------------------------- june@yuweol:~/poc/ffmpeg2theora/crash3$ ffmpeg2theora poc [h263 @ 0x557eb7fb5840] Format h263 detected only with low score of 25, misdetection possible! Input #0, h263, from 'poc': Duration: N/A, bitrate: N/A Stream #0:0: Video: h263, yuv420p, 176x144 [SAR 12:11 DAR 4:3], 29.97 tbr, 1200k tbn, 29.97 tbc Pixel Aspect Ratio: 1.09/1 Frame Aspect Ratio: 1.33/1 WARNING: Can't get duration of media, not indexing, writing Skeleton 3 track. [h263 @ 0x557eb7fb6880] I cbpc damaged at 0 0 [h263 @ 0x557eb7fb6880] Error at MB: 0 [h263 @ 0x557eb7fb6880] concealing 99 DC, 99 AC, 99 MV errors in I frame 0:00:00.03 audio: 0kbps video: 16kbps, time elapsed: 00:00:00 Segmentation fault ------------------------------------------- Starting program: /usr/bin/ffmpeg2theora poc [Thread debugging using libthread_db enabled] Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1". [h263 @ 0x555555811820] Format h263 detected only with low score of 25, misdetection possible! Input #0, h263, from 'poc': Duration: N/A, bitrate: N/A Stream #0:0: Video: h263, yuv420p, 176x144 [SAR 12:11 DAR 4:3], 29.97 tbr, 1200k tbn, 29.97 tbc ************************************************************ Breakpoint 1, 0x0000555555563ab8 in ?? () (gdb) x/2x $rbp - 0x368 0x7fffffffca18: 0xf493f960 0x00007fff ************************************************************ - This is entry point of function,local variable $rbp - 0x368 is 0x7ffff693f960. ************************************************************ (gdb) c Continuing. Pixel Aspect Ratio: 1.09/1 Frame Aspect Ratio: 1.33/1 WARNING: Can't get duration of media, not indexing, writing Skeleton 3 track. [h263 @ 0x555555812860] I cbpc damaged at 0 0 [h263 @ 0x555555812860] Error at MB: 0 [h263 @ 0x555555812860] concealing 99 DC, 99 AC, 99 MV errors in I frame 0:00:00.03 audio: 0kbps video: 16kbps, time elapsed: 00:01:55 Program received signal SIGSEGV, Segmentation fault. clear_context (s=0x7ffff493f960) at libswresample/swresample.c:116 116 s->in_buffer_index= 0; ************************************************************ - the value 7ffff493f960 which is same as the above uninitialized value was passed to clear_context function as a parameter. ************************************************************ (gdb) bt #0 clear_context (s=0x7ffff493f960) at libswresample/swresample.c:116 #1 0x00005555555648e6 in ?? () #2 0x000055555555c8da in main () (gdb) f 1 #1 0x00005555555648e6 in ?? () (gdb) x/5i $rip-16 0x5555555648d6: mov -0x368(%rbp),%edi 0x5555555648dc: test %rdi,%rdi 0x5555555648df: je 0x5555555648e6 0x5555555648e1: callq 0x55555555b650 <swr_close@plt> => 0x5555555648e6: mov -0x38(%rbp),%rax (gdb) x/2x $rbp - 0x368 0x7fffffffca18: 0xf493f960 0x00007fff ************************************************************ - argument %rdi comes from -0x368(%rbp) which is same position when we check at the entry point of this function ------------------------------------------- This bug was found with a fuzzer developed by 'SoftSec' group at KAIST. -- System Information: Debian Release: buster/sid APT prefers unstable-debug APT policy: (500, 'unstable-debug'), (500, 'testing-debug'), (500, 'stable-updates'), (500, 'testing'), (500, 'stable'), (1, 'experimental-debug') Architecture: amd64 (x86_64) Kernel: Linux 4.9.0-3-amd64 (SMP w/1 CPU core) Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE=en_US:en (charmap=UTF-8) Shell: /bin/sh linked to /bin/dash Init: systemd (via /run/systemd/system) Versions of packages ffmpeg2theora depends on: ii libavcodec57 7:3.3.4-2+b2 ii libavdevice57 7:3.3.4-2+b2 ii libavfilter6 7:3.3.4-2+b2 ii libavformat57 7:3.3.4-2+b2 ii libavutil55 7:3.3.4-2+b2 ii libc6 2.24-17 ii libkate1 0.4.1-7+b1 ii libogg0 1.3.2-1+b1 ii liboggkate1 0.4.1-7+b1 ii libpostproc54 7:3.3.4-2+b2 ii libswresample2 7:3.3.4-2+b2 ii libswscale4 7:3.3.4-2+b2 ii libtheora0 1.1.1+dfsg.1-14+b1 ii libvorbis0a 1.3.5-4 ii libvorbisenc2 1.3.5-4 ffmpeg2theora recommends no packages. ffmpeg2theora suggests no packages. -- no debconf information
poc
Description: Binary data
--- End Message ---
--- Begin Message ---Version: 0.30-2+rm Dear submitter, as the package ffmpeg2theora has just been removed from the Debian archive unstable we hereby close the associated bug reports. We are sorry that we couldn't deal with your issue properly. For details on the removal, please see https://bugs.debian.org/1055019 The version of this package that was in Debian prior to this removal can still be found using https://snapshot.debian.org/. Please note that the changes have been done on the master archive and will not propagate to any mirrors until the next dinstall run at the earliest. This message was generated automatically; if you believe that there is a problem with it please contact the archive administrators by mailing ftpmas...@ftp-master.debian.org. Debian distribution maintenance software pp. Thorsten Alteholz (the ftpmaster behind the curtain)
--- End Message ---
