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and subject line Bug#320150: fixed in ffmpeg 0.cvs20050811-1
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From: Moritz Muehlenhoff <[EMAIL PROTECTED]>
To: Debian Bug Tracking System <[EMAIL PROTECTED]>
Subject: ffmpeg: Integer overflow in MPEG encoding
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Date: Wed, 27 Jul 2005 13:02:15 +0200
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Package: ffmpeg
Version: 0.cvs20050626-2
Severity: important
Tags: security
I'm quoting the CVS log message from Michael Niedermeyer in verbose:
Update of /cvsroot/ffmpeg/ffmpeg/libavcodec
In directory mail:/var2/tmp/cvs-serv7818
Modified Files:
mpegvideo.c
Log Message:
Fix for overflow issue in mpegvideo.c patch by (Martin Boehme: boehme, inb
uni-luebeck de)
this integer overflow might lead to the execution of arbitrary code during
encoding with threads
Index: mpegvideo.c
===================================================================
RCS file: /cvsroot/ffmpeg/ffmpeg/libavcodec/mpegvideo.c,v
retrieving revision 1.486
retrieving revision 1.487
diff -u -d -r1.486 -r1.487
--- mpegvideo.c 14 Jul 2005 21:39:35 -0000 1.486
+++ mpegvideo.c 25 Jul 2005 23:07:27 -0000 1.487
@@ -2316,8 +2316,8 @@
int start_y= s->thread_context[i]->start_mb_y;
int end_y= s->thread_context[i]-> end_mb_y;
int h= s->mb_height;
- uint8_t *start= buf + buf_size*start_y/h;
- uint8_t *end = buf + buf_size* end_y/h;
+ uint8_t *start= buf + (size_t)(((int64_t) buf_size)*start_y/h);
+ uint8_t *end = buf + (size_t)(((int64_t) buf_size)* end_y/h);
init_put_bits(&s->thread_context[i]->pb, start, end - start);
}
Cheers,
Moritz
-- System Information:
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Versions of packages ffmpeg depends on:
ii libc6 2.3.2.ds1-22 GNU C Library: Shared libraries an
ii libdc1394-13 1.1.0-2 high level programming interface f
ii libfreetype6 2.1.10-1 FreeType 2 font engine, shared lib
ii libimlib2 1.2.0-2.2 powerful image loading and renderi
ii libogg0 1.1.2-1 Ogg Bitstream Library
ii libraw1394-5 0.10.1-1.1 library for direct access to IEEE
ii libsdl1.2debi 1.2.7+1.2.8cvs20041007-5.3 Simple DirectMedia Layer
ii libvorbis0a 1.1.0-1 The Vorbis General Audio Compressi
ii libvorbisenc2 1.1.0-1 The Vorbis General Audio Compressi
ii libx11-6 6.8.2.dfsg.1-4 X Window System protocol client li
ii xlibs 6.8.2.dfsg.1-4 X Window System client libraries m
ii zlib1g 1:1.2.3-1 compression library - runtime
ffmpeg recommends no packages.
-- no debconf information
---------------------------------------
Received: (at 320150-close) by bugs.debian.org; 18 Aug 2005 13:39:44 +0000
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From: Sam Hocevar (Debian packages) <[EMAIL PROTECTED]>
To: [EMAIL PROTECTED]
X-Katie: $Revision: 1.56 $
Subject: Bug#320150: fixed in ffmpeg 0.cvs20050811-1
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Source: ffmpeg
Source-Version: 0.cvs20050811-1
We believe that the bug you reported is fixed in the latest version of
ffmpeg, which is due to be installed in the Debian FTP archive:
ffmpeg_0.cvs20050811-1.diff.gz
to pool/main/f/ffmpeg/ffmpeg_0.cvs20050811-1.diff.gz
ffmpeg_0.cvs20050811-1.dsc
to pool/main/f/ffmpeg/ffmpeg_0.cvs20050811-1.dsc
ffmpeg_0.cvs20050811-1_i386.deb
to pool/main/f/ffmpeg/ffmpeg_0.cvs20050811-1_i386.deb
ffmpeg_0.cvs20050811.orig.tar.gz
to pool/main/f/ffmpeg/ffmpeg_0.cvs20050811.orig.tar.gz
libavcodec-dev_0.cvs20050811-1_i386.deb
to pool/main/f/ffmpeg/libavcodec-dev_0.cvs20050811-1_i386.deb
libavformat-dev_0.cvs20050811-1_i386.deb
to pool/main/f/ffmpeg/libavformat-dev_0.cvs20050811-1_i386.deb
libpostproc-dev_0.cvs20050811-1_i386.deb
to pool/main/f/ffmpeg/libpostproc-dev_0.cvs20050811-1_i386.deb
A summary of the changes between this version and the previous one is
attached.
Thank you for reporting the bug, which will now be closed. If you
have further comments please address them to [EMAIL PROTECTED],
and the maintainer will reopen the bug report if appropriate.
Debian distribution maintenance software
pp.
Sam Hocevar (Debian packages) <[EMAIL PROTECTED]> (supplier of updated ffmpeg
package)
(This message was generated automatically at their request; if you
believe that there is a problem with it please contact the archive
administrators by mailing [EMAIL PROTECTED])
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
Format: 1.7
Date: Thu, 11 Aug 2005 14:22:03 +0200
Source: ffmpeg
Binary: libavformat-dev ffmpeg libavcodec-dev libpostproc-dev
Architecture: source i386
Version: 0.cvs20050811-1
Distribution: unstable
Urgency: low
Maintainer: Sam Hocevar (Debian packages) <[EMAIL PROTECTED]>
Changed-By: Sam Hocevar (Debian packages) <[EMAIL PROTECTED]>
Description:
ffmpeg - multimedia player, server and encoder
libavcodec-dev - development files for libavcodec
libavformat-dev - development files for libavformat
libpostproc-dev - development files for libpostproc
Closes: 319563 320150
Changes:
ffmpeg (0.cvs20050811-1) unstable; urgency=low
.
* New CVS snapshot.
* Upstream fixed an integer overflow in the MPEG encoder (Closes: #320150).
* debian/rules:
+ Activated libgsm support.
+ Fixed theora support.
+ Switched installation method to dh_install.
* Applied patch from Christian Aichinger and others to fix the clobbering
of the %ebx register during build (Closes: #319563).
Files:
ef2563dc88053e4625a3f2065468d954 868 libs optional ffmpeg_0.cvs20050811-1.dsc
5a30ae0250b713c2eefaabf54bf198f7 1981997 libs optional
ffmpeg_0.cvs20050811.orig.tar.gz
c108f02436d42b210f7381cb8823e30e 11927 libs optional
ffmpeg_0.cvs20050811-1.diff.gz
b9a75f09ec0295d9b0bd2f62997e7da8 4027508 graphics optional
ffmpeg_0.cvs20050811-1_i386.deb
009ec54503890c8318a93c98be0af64d 2430380 libdevel optional
libavcodec-dev_0.cvs20050811-1_i386.deb
b39696546cef374ddf47a0eab87ffdbd 45072 libdevel optional
libpostproc-dev_0.cvs20050811-1_i386.deb
a284bedb49f1a6fa1fa579f70ca6dfaa 517868 libdevel optional
libavformat-dev_0.cvs20050811-1_i386.deb
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