Buffer overflow in Gpac
CVE-2021-21848
An exploitable integer overflow vulnerability exists within the MPEG-4 decoding functionality of the GPAC Project on Advanced Content library v1.0.1. The library will actually reuse the parser for atoms with the “stsz” FOURCC code when parsing atoms that use the “stz2” FOURCC code and can cause an integer overflow due to unchecked arithmetic resulting in a heap-based buffer overflow that causes memory corruption. An attacker can convince a user to open a video to trigger this vulnerability.
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: 0.017 (76.2th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 76th percentile — 76.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.017 · newest: 0.017 · change: 0.000
Affected products
- Gpac — versions 1.0.1
- Debian Linux — versions 10.0, 11.0
- Gpac Project — versions GPAC Project Advanced Content commit a8a8d412dabcb129e695c3e7d861fcc81f608304,GPAC Project Advanced Content v1.0.1
Weakness classification (CWE)
Public proof-of-concept exploits
References
- talosintelligence.com/vulnerability_reports/TALOS-2021-1297 (Exploit, Third Party Advisory)
- www.debian.org/security/2021/dsa-4966 (vendor-advisory, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-21848?
- CVE-2021-21848 is a high-severity vulnerability in Gpac, classified under Integer Overflow to Buffer Overflow. CVSS score: 8.8/10. Published 2021-08-25.
- How severe is CVE-2021-21848?
- High severity. CVSS v3 base score is 8.8 out of 10.
- Is CVE-2021-21848 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.