Buffer overflow in Libav
CVE-2019-9719
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. NOTE: Third parties dispute that this is a vulnerability because “no evidence of a vulnerability is provided” and only “a generic warning from a static code analysis” is provided
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.020 (80.2th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 80th percentile — 80.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.020 · newest: 0.020 · change: 0.000
Affected products
Weakness classification (CWE)
References
- github.com/libav/libav/blob/df744e3cf66548c9167ea857104a29d2ea92819e/libavcodec… (Exploit, Third Party Advisory)
- github.com/libav/libav/commits/master/libavcodec/srtdec.c (Third Party Advisory)
- lgtm.com/security/ (Third Party Advisory)
- lgtm.com/projects/g/libav/libav/snapshot/f5f553ca3bdca0c97dd08bbf002f0d8cb19378… (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2019-9719?
- CVE-2019-9719 is a high-severity vulnerability in Libav, classified under Out-of-bounds Write. CVSS score: 8.8/10. Published 2019-09-19.
- How severe is CVE-2019-9719?
- High severity. CVSS v3 base score is 8.8 out of 10.