| Name | CVE-2016-7970 |
| Description | Buffer overflow in the calc_coeff function in libass/ass_blur.c in libass before 0.13.4 allows remote attackers to cause a denial of service via unspecified vectors. |
| 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 |
|---|
| libass (PTS) | jessie, jessie (lts) | 0.10.2-3+deb8u1 | fixed |
| stretch | 1:0.13.4-2 | fixed |
| buster | 1:0.14.0-2 | fixed |
| bullseye | 1:0.15.0-2 | fixed |
| bookworm | 1:0.17.1-1 | fixed |
| sid, trixie | 1:0.17.3-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| libass | source | wheezy | (not affected) | | | |
| libass | source | jessie | (not affected) | | | |
| libass | source | (unstable) | 0.13.4-1 | | | |
Notes
[jessie] - libass <not-affected> (Vulnerable code introduced later)
[wheezy] - libass <not-affected> (Vulnerable code first introduced in July 2015)
Fixed by: https://github.com/libass/libass/pull/240/commits/08e754612019ed84d1db0d1fc4f5798248decd75
Vulnerable function calc_coeff introduced in: https://github.com/libass/libass/commit/d787615845d78d8f8e6d1a4ffc3dc3eecd8a92f6 (0.13.0)