CVE-2021-21838: 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 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 | =10.0 | |
| Debian | =11.0 |
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Reference Links
- https://talosintelligence.com/vulnerability_reports/TALOS-2021-1297
- https://www.debian.org/security/2021/dsa-4966
- https://www.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-2021-21838
Frequently Asked Questions
What is the severity of CVE-2021-21838?
CVE-2021-21838 is considered a high severity vulnerability due to its potential to cause heap-based buffer overflows.
How do I fix CVE-2021-21838?
To fix CVE-2021-21838, update the GPAC library to version 0.5.2-426-gc5ad4e4+dfsg5-5 or later.
What types of systems are affected by CVE-2021-21838?
CVE-2021-21838 affects GPAC versions 1.0.1 and earlier installed on Debian 10.0 and Debian 11.0.
What happens if CVE-2021-21838 is exploited?
Exploitation of CVE-2021-21838 can lead to remote code execution or a denial of service through heap-based buffer overflow.
Is CVE-2021-21838 an easy vulnerability to exploit?
CVE-2021-21838 can be exploited with specially crafted MPEG-4 files, making it relatively straightforward for attackers.
- collector/security-tracker-debian
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- source/MITRE
- agent/author
- agent/last-modified-date
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- agent/event
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- agent/tags
- agent/softwarecombine
- collector/nvd-index
- agent/software-canonical-lookup-request
- package-manager/debian
- vendor/gpac
- canonical/gpac mp4box
- version/gpac mp4box/1.0.1
- vendor/debian
- canonical/debian
- version/debian/10.0
- version/debian/11.0