Division by zero in FFmpeg - CVE-2009-4639
Published: October 26, 2011 / Updated: June 8, 2025
Vulnerability identifier: #VU110610
CSH Severity: Medium
CVSS v4.0:
CVE-ID: CVE-2009-4639
CWE-ID: CWE-369
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: ffmpeg.sourceforge.net
Affected software:
FFmpeg
FFmpeg
Detailed vulnerability description
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to divide-by-zero error within The av_rescale_rnd function in the AVI demuxer in FFmpeg 0.5. A remote attacker can perform a denial of service (crash) via a crafted AVI file that triggers a divide-by-zero error.
How to mitigate CVE-2009-4639
Install update from vendor's website.
Sources
- http://scarybeastsecurity.blogspot.com/2009/09/patching-ffmpeg-into-shape.html
- http://secunia.com/advisories/36805
- http://secunia.com/advisories/39482
- http://www.mandriva.com/security/advisories?name=MDVSA-2011:059
- http://www.mandriva.com/security/advisories?name=MDVSA-2011:060
- http://www.mandriva.com/security/advisories?name=MDVSA-2011:061
- http://www.mandriva.com/security/advisories?name=MDVSA-2011:088
- http://www.mandriva.com/security/advisories?name=MDVSA-2011:112
- http://www.securityfocus.com/bid/36465
- http://www.ubuntu.com/usn/USN-931-1
- http://www.vupen.com/english/advisories/2010/0935
- http://www.vupen.com/english/advisories/2011/1241
- https://roundup.ffmpeg.org/roundup/ffmpeg/issue1240
- https://roundup.ffmpeg.org/roundup/ffmpeg/issue1245