CVE-2021-20246: Divide by Zero
First published: Mon Feb 15 2021(Updated: )
A flaw was found in ImageMagick in MagickCore/resample.c. An attacker who submits a crafted file that is processed by ImageMagick could trigger undefined behavior in the form of math division by zero. The highest threat from this vulnerability is to system availability.
Credit: secalert@redhat.com secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| ImageMagick ImageMagick | <6.9.11-62 | |
| ImageMagick ImageMagick | >=7.0.0<7.0.10-62 | |
| Redhat Enterprise Linux | =6.0 | |
| Redhat Enterprise Linux | =7.0 | |
| Redhat Enterprise Linux | =8.0 | |
| Fedoraproject Fedora | =33 | |
| Debian Debian Linux | =9.0 | |
| redhat/ImageMagick 6.9.11 | <62 | 62 |
| redhat/ImageMagick 7.0.10 | <62 | 62 |
| debian/imagemagick | <=8:6.9.10.23+dfsg-2.1+deb10u1 | 8:6.9.10.23+dfsg-2.1+deb10u7 8:6.9.11.60+dfsg-1.3+deb11u2 8:6.9.11.60+dfsg-1.3+deb11u3 8:6.9.11.60+dfsg-1.6 8:6.9.11.60+dfsg-1.6+deb12u1 8:6.9.12.98+dfsg1-5 8:6.9.12.98+dfsg1-5.2 |
| ubuntu/imagemagick | <8:6.9.7.4+dfsg-16ubuntu6.12 | 8:6.9.7.4+dfsg-16ubuntu6.12 |
| ubuntu/imagemagick | <8:6.9.10.23+dfsg-2.1ubuntu11.9 | 8:6.9.10.23+dfsg-2.1ubuntu11.9 |
| ubuntu/imagemagick | <8:6.9.11.60+dfsg-1.3ubuntu0.22.04.3+ | 8:6.9.11.60+dfsg-1.3ubuntu0.22.04.3+ |
| ubuntu/imagemagick | <8:6.9.11.60+dfsg-1.3ubuntu0.22.10.1 | 8:6.9.11.60+dfsg-1.3ubuntu0.22.10.1 |
| ubuntu/imagemagick | <8:6.9.11.60+dfsg-1.3ubuntu1 | 8:6.9.11.60+dfsg-1.3ubuntu1 |
| ubuntu/imagemagick | <8:6.9.11.60+dfsg-1.3ubuntu1 | 8:6.9.11.60+dfsg-1.3ubuntu1 |
| ubuntu/imagemagick | <8:6.9.11.60+dfsg-1.3ubuntu1 | 8:6.9.11.60+dfsg-1.3ubuntu1 |
| ubuntu/imagemagick | <8:6.7.7.10-6ubuntu3.13+ | 8:6.7.7.10-6ubuntu3.13+ |
| ubuntu/imagemagick | <8:6.8.9.9-7ubuntu5.16+ | 8:6.8.9.9-7ubuntu5.16+ |
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Reference Links
- https://bugzilla.redhat.com/show_bug.cgi?id=1928941
- https://lists.debian.org/debian-lts-announce/2021/03/msg00030.html
- https://lists.debian.org/debian-lts-announce/2023/05/msg00020.html
- https://launchpad.net/bugs/cve/CVE-2021-20246
- https://github.com/ImageMagick/ImageMagick/issues/3195
- https://github.com/ImageMagick/ImageMagick/commit/8d25d94a363b104acd6ff23df7470aeedb806c51
- https://github.com/ImageMagick/ImageMagick/blob/8d25d94a363b104acd6ff23df7470aeedb806c51/MagickCore/resample.c
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1929886
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1929887
- https://access.redhat.com/support/policy/updates/errata/
- https://access.redhat.com/security/cve/cve-2021-20246
- https://github.com/ImageMagick/ImageMagick6/commit/f3190d4a6e6e8556575c84b5d976f77d111caa74
- https://security-tracker.debian.org/tracker/CVE-2021-20246
- https://ubuntu.com/security/notices/USN-5158-1
- https://ubuntu.com/security/notices/USN-5736-1
- https://ubuntu.com/security/notices/USN-5736-2
- https://ubuntu.com/security/notices/USN-6200-1
- https://www.cve.org/CVERecord?id=CVE-2021-20246
- https://nvd.nist.gov/vuln/detail/CVE-2021-20246
- https://ubuntu.com/security/CVE-2021-20246
Frequently Asked Questions
What is CVE-2021-20246?
CVE-2021-20246 is a vulnerability found in ImageMagick that could trigger undefined behavior in the form of math division by zero.
How does CVE-2021-20246 affect system availability?
CVE-2021-20246 poses a high threat to system availability.
Which software versions are affected by CVE-2021-20246?
CVE-2021-20246 affects ImageMagick versions 8:6.9.7.4+dfsg-16ubuntu6.12, 8:6.7.7.10-6ubuntu3.13+, 8:6.8.9.9-7ubuntu5.16+, 8:6.9.10.23+dfsg-2.1ubuntu11.9, 8:6.9.11.60+dfsg-1.3ubuntu1, 8:6.9.11.60+dfsg-1.3ubuntu0.22.04.3+, 8:6.9.11.60+dfsg-1.3ubuntu0.22.10.1, 8:6.9.11.60+dfsg-1.3ubuntu1, and 8:6.9.10.23+dfsg-2.1+deb10u5, 8:6.9.11.60+dfsg-1.6.
How can I fix CVE-2021-20246?
To fix CVE-2021-20246, you should update ImageMagick to versions 8:6.9.7.4+dfsg-16ubuntu6.12, 8:6.7.7.10-6ubuntu3.13+, 8:6.8.9.9-7ubuntu5.16+, 8:6.9.10.23+dfsg-2.1ubuntu11.9, 8:6.9.11.60+dfsg-1.3ubuntu1, 8:6.9.11.60+dfsg-1.3ubuntu0.22.04.3+, 8:6.9.11.60+dfsg-1.3ubuntu0.22.10.1, 8:6.9.11.60+dfsg-1.3ubuntu1, 8:6.9.10.23+dfsg-2.1+deb10u5, or 8:6.9.11.60+dfsg-1.6.
Where can I find more information about CVE-2021-20246?
You can find more information about CVE-2021-20246 on the following links: [link1], [link2], [link3].
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