| Name | CVE-2019-9720 |
| Description | A stack-based buffer overflow in the subtitle decoder in Libav 12.3 allows attackers to corrupt the stack via a crafted video file in Matroska format, because srt_to_ass in libavcodec/srtdec.c misuses snprintf. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| libav (PTS) | jessie, jessie (lts) | 6:11.12-1~deb8u9 | vulnerable |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| libav | source | wheezy | (unfixed) | end-of-life | | |
| libav | source | (unstable) | (unfixed) | unimportant | | |
Notes
Actual vulnerability description is (https://lgtm.com/security/):
"Denial of service due to quadratic call to strstr in srtdec.c"
Using strstr is not an actual DoS