CVE-2021-20224: Integer Overflow
First published: Thu Aug 25 2022(Updated: )
An integer overflow issue was discovered in ImageMagick's ExportIndexQuantum() function in MagickCore/quantum-export.c. Function calls to GetPixelIndex() could result in values outside the range of representable for the 'unsigned char'. When ImageMagick processes a crafted pdf file, this could lead to an undefined behaviour or a crash.
Credit: secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| ImageMagick | <6.9.11-57 | |
| ImageMagick | >=7.0.0-0<7.0.10-57 | |
| debian/imagemagick | 8:6.9.11.60+dfsg-1.3+deb11u4 8:6.9.11.60+dfsg-1.3+deb11u3 8:6.9.11.60+dfsg-1.6+deb12u2 8:6.9.11.60+dfsg-1.6+deb12u1 8:7.1.1.43+dfsg1-1 8:7.1.1.46+dfsg1-1 |
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Reference Links
- https://github.com/ImageMagick/ImageMagick/commit/5af1dffa4b6ab984b5f13d1e91c95760d75f12a6
- https://github.com/ImageMagick/ImageMagick/pull/3083
- https://github.com/ImageMagick/ImageMagick6/commit/553054c1cb1e4e05ec86237afef76a32cd7c464d
- https://lists.debian.org/debian-lts-announce/2023/03/msg00008.html
- https://launchpad.net/bugs/cve/CVE-2021-20224
- https://security-tracker.debian.org/tracker/CVE-2021-20224
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-20224
- https://nvd.nist.gov/vuln/detail/CVE-2021-20224
- https://ubuntu.com/security/CVE-2021-20224
Frequently Asked Questions
What is the severity of CVE-2021-20224?
The severity of CVE-2021-20224 is medium.
How does CVE-2021-20224 affect ImageMagick?
CVE-2021-20224 affects ImageMagick's ExportIndexQuantum() function in MagickCore/quantum-export.c.
What is the impact of CVE-2021-20224?
The impact of CVE-2021-20224 is an integer overflow issue which could lead to values outside the range of representable for the 'unsigned char' when processing a crafted pdf file.
Which versions of ImageMagick are affected by CVE-2021-20224?
ImageMagick versions 8:6.9.10.23+dfsg-2.1ubuntu11.9, 8:6.9.7.4+dfsg-16ubuntu6.14, 8:6.7.7.10-6ubuntu3.13+, 8:6.9.11.57+dfsg-1, and 8:6.8.9.9-7ubuntu5.16+ are affected by CVE-2021-20224.
How can I fix CVE-2021-20224 in ImageMagick?
To fix CVE-2021-20224 in ImageMagick, update to the recommended versions: 8:6.9.10.23+dfsg-2.1ubuntu11.9, 8:6.9.7.4+dfsg-16ubuntu6.14, 8:6.7.7.10-6ubuntu3.13+, 8:6.9.11.57+dfsg-1, or 8:6.8.9.9-7ubuntu5.16+.
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