Excessive Iteration Affecting libav package, versions <6:11.12-1~deb8u4
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-DEBIAN8-LIBAV-405158
- published7 Sept 2017
- disclosed7 Sept 2017
Introduced: 7 Sep 2017
CVE-2017-14171 (opens in a new tab)How to fix?
Upgrade Debian:8 libav to version 6:11.12-1~deb8u4 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream libav package and not the libav package as distributed by Debian.
See How to fix? for Debian:8 relevant fixed versions and status.
In libavformat/nsvdec.c in FFmpeg 2.4 and 3.3.3, a DoS in nsv_parse_NSVf_header() due to lack of an EOF (End of File) check might cause huge CPU consumption. When a crafted NSV file, which claims a large "table_entries_used" field in the header but does not contain sufficient backing data, is provided, the loop over 'table_entries_used' would consume huge CPU resources, since there is no EOF check inside the loop.
References
- https://security-tracker.debian.org/tracker/CVE-2017-14171
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-14171
- http://www.debian.org/security/2017/dsa-3996
- https://lists.debian.org/debian-lts-announce/2019/01/msg00006.html
- https://github.com/FFmpeg/FFmpeg/commit/c24bcb553650b91e9eff15ef6e54ca73de2453b7
- http://www.securityfocus.com/bid/100706
- http://people.ubuntu.com/~ubuntu-security/cve/CVE-2017-14171