CVE-2021-21845: Buffer Overflow
First published: Wed Aug 18 2021(Updated: )
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 in “stsc” decoder 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.
Credit: talos-cna@cisco.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| debian/gpac | 0.5.2-426-gc5ad4e4+dfsg5-5 1.0.1+dfsg1-4+deb11u3 2.2.1+dfsg1-3 | |
| GPAC MP4Box | =1.0.1 | |
| Debian Linux | =10.0 | |
| Debian Linux | =11.0 |
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Reference Links
- https://talosintelligence.com/vulnerability_reports/TALOS-2021-1297
- https://github.com/gpac/gpac/commit/b515fd04f5f00f4a99df741042f1efb31ad56351
- https://github.com/gpac/gpac/issues/1814
- https://security-tracker.debian.org/tracker/CVE-2021-21845
- https://www.debian.org/security/2021/dsa-4966
- https://www.talosintelligence.com/vulnerability_reports/TALOS-2021-1297
Frequently Asked Questions
What is the severity of CVE-2021-21845?
CVE-2021-21845 is classified as a high severity vulnerability due to the potential for remote code execution through integer overflow.
How do I fix CVE-2021-21845?
To fix CVE-2021-21845, update GPAC to version 0.5.2-426-gc5ad4e4+dfsg5-5 or one of the other patched versions listed in the vendor advisory.
What types of systems are affected by CVE-2021-21845?
CVE-2021-21845 affects systems running GPAC v1.0.1 and its earlier versions in Debian Linux distributions.
What exploitation conditions exist for CVE-2021-21845?
Exploitation of CVE-2021-21845 requires a specially crafted MPEG-4 file processed by the GPAC library.
What are the potential impacts of CVE-2021-21845?
The potential impacts of CVE-2021-21845 include remote code execution and denial of service due to heap-based buffer overflow.
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- version/gpac mp4box/1.0.1
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- version/debian linux/11.0