| Name | CVE-2020-36430 |
| Description | libass 0.15.x before 0.15.1 has a heap-based buffer overflow in decode_chars (called from decode_font and process_text) because the wrong integer data type is used for subtraction. |
| 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) | buster | 1:0.14.0-2 | fixed |
| bullseye | 1:0.15.0-2 | fixed |
| bookworm | 1:0.17.1-1 | fixed |
| sid, trixie | 1:0.17.1-2 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| libass | source | stretch | (not affected) | | | |
| libass | source | buster | (not affected) | | | |
| libass | source | (unstable) | 1:0.15.0-2 | | | |
Notes
[buster] - libass <not-affected> (Vulnerable code not present)
[stretch] - libass <not-affected> (Vulnerable code not present)
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=26674
https://github.com/google/oss-fuzz-vulns/blob/main/vulns/libass/OSV-2020-2099.yaml
Introduced by: https://github.com/libass/libass/commit/910211f1c0078e37546f73e95306724358b89be2 (0.15.0)
Fixed by: https://github.com/libass/libass/commit/017137471d0043e0321e377ed8da48e45a3ec632 (0.15.1)