Out-of-bounds Read in Libav
CVE-2020-18778
In Libav 12.3, there is a heap-based buffer over-read in vc1_decode_p_mb_intfi in vc1_block.c that allows an attacker to cause denial-of-service via a crafted file.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.009 (57.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 58th percentile — 57.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000
Affected products
- Libav — versions 12.3
Weakness classification (CWE)
Public proof-of-concept exploits
References
- bugzilla.libav.org/show_bug.cgi (Exploit, Third Party Advisory, Issue Tracking, Broken Link)
- cwe.mitre.org/data/definitions/126.html (Technical Description)
Frequently asked questions
- What is CVE-2020-18778?
- CVE-2020-18778 is a medium-severity vulnerability in Libav, classified under Out-of-bounds Read. CVSS score: 6.5/10. Published 2021-08-23.
- How severe is CVE-2020-18778?
- Medium severity. CVSS v3 base score is 6.5 out of 10.
- Is CVE-2020-18778 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.