CVE-2021-40633
First published: Tue Jun 14 2022(Updated: )
A memory leak (out-of-memory) in gif2rgb in util/gif2rgb.c in giflib 5.1.4 allows remote attackers trigger an out of memory exception or denial of service via a gif format file.
Credit: cve@mitre.org cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| GifLib Project GifLib | =5.1.4 | |
| ubuntu/giflib | <5.1.4-2ubuntu0.1+ | 5.1.4-2ubuntu0.1+ |
| ubuntu/giflib | <5.1.9-1ubuntu0.1 | 5.1.9-1ubuntu0.1 |
| ubuntu/giflib | <5.1.9-2ubuntu0.1 | 5.1.9-2ubuntu0.1 |
| ubuntu/giflib | <5.2.1-2.5ubuntu0.1 | 5.2.1-2.5ubuntu0.1 |
| ubuntu/giflib | <5.1.4-0.3~16.04.1+ | 5.1.4-0.3~16.04.1+ |
| debian/giflib | <=5.1.9-2<=5.2.1-2.5 | 5.2.2-1 |
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Reference Links
- https://sourceforge.net/p/giflib/bugs/157/
- https://launchpad.net/bugs/cve/CVE-2021-40633
- https://security-tracker.debian.org/tracker/CVE-2021-40633
- https://www.cve.org/CVERecord?id=CVE-2021-40633
- https://ubuntu.com/security/notices/USN-6824-1
- https://nvd.nist.gov/vuln/detail/CVE-2021-40633
- https://sourceforge.net/p/giflib/code/ci/ccbc956432650734c91acb3fc88837f7b81267ff/
- https://ubuntu.com/security/CVE-2021-40633
Frequently Asked Questions
What is CVE-2021-40633?
CVE-2021-40633 is a memory leak vulnerability in gif2rgb in giflib 5.1.4 that can allow remote attackers to trigger an out of memory exception or denial of service via a gif format file.
What is the severity of CVE-2021-40633?
CVE-2021-40633 has a severity rating of 8.8, which is considered high.
How does CVE-2021-40633 affect giflib?
CVE-2021-40633 affects giflib 5.1.4, causing a memory leak in gif2rgb.
How can remote attackers exploit CVE-2021-40633?
Remote attackers can exploit CVE-2021-40633 by sending a specially crafted gif format file to trigger an out of memory exception or denial of service.
Is there a fix for CVE-2021-40633?
Yes, updating to a version of giflib that is not affected by the vulnerability (5.1.5 or later) will resolve CVE-2021-40633.
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