Description
The sdp_parse_fmtp_config_h264 function in libavformat/rtpdec_h264.c in FFmpeg before 3.3.4 mishandles empty sprop-parameter-sets values, which allows remote attackers to cause a denial of service (heap buffer overflow) or possibly have unspecified other impact via a crafted sdp file.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | ffmpeg | 7:3.3.4-1 | — |
| Debian 13 | ffmpeg | 7:3.3.4-1 | — |
| Debian 12 | ffmpeg | 7:3.3.4-1 | — |
| Debian 9 | ffmpeg | 7:3.2.8-1~deb9u1 | DSA-3996-1 |
| Debian 8 | libav | 6:11.12-1~deb8u4 | DLA-1630-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 16.04 LTS | ffmpeg | 7:2.8.14-0ubuntu0.16.04.1 | — |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.6 | ffmpeg | 3.2.8-r0 | — |
| Alpine v3.5 | ffmpeg | 3.1.11-r0 | — |
| Alpine v3.4 | ffmpeg | 3.1.11-r0 | — |
Advisories 2
- DSA-3996-1 ffmpeg - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-1630-1 libav - security update Debian Security (DSA / DLA) · Mar 9, 2026