Buffer overflow in Gpac
CVE-2021-21844
Multiple exploitable integer overflow vulnerabilities exist within the MPEG-4 decoding functionality of the GPAC Project on Advanced Content library v1.0.1. A specially crafted MPEG-4 input when encountering an atom using the “stco” FOURCC code, 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.
EPSS: 0.020 (78.3th percentile) — read the EPSS interpretation.
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.
Affected products
- Gpac — versions 1.0.1
- Debian Debian_linux — versions 10.0, 11.0
- N/a Gpac — versions GPAC Project Advanced Content commit a8a8d412dabcb129e695c3e7d861fcc81f608304 ,GPAC Project Advanced Content v1.0.1
Weakness classification (CWE)
Public proof-of-concept exploits
References
- talos-cna@cisco.com (Technical Description, Exploit, Third Party Advisory, x_refsource_MISC)
- talos-cna@cisco.com (vendor-advisory, Third Party Advisory, x_refsource_DEBIAN)
- talos-cna@cisco.com (Technical Description, Exploit, Third Party Advisory, x_refsource_MISC)
Frequently asked questions
- What is CVE-2021-21844?
- CVE-2021-21844 is a high-severity vulnerability in Gpac, classified under Integer Overflow to Buffer Overflow. CVSS score: 8.8/10. Published 2021-08-18.
- How severe is CVE-2021-21844?
- High severity. CVSS v3 base score is 8.8 out of 10.
- Is CVE-2021-21844 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.