CVE-2021-20241: Divide by Zero
First published: Mon Feb 15 2021(Updated: )
A flaw was found in ImageMagick in coders/jp2.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 | >=7.0.10<7.0.10-62 | |
| 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-16ubuntu6.14 | 8:6.9.7.4+dfsg-16ubuntu6.14 |
| 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 | <8:6.8.9.9-7ubuntu5.16+ | 8:6.8.9.9-7ubuntu5.16+ |
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Reference Links
- https://bugzilla.redhat.com/show_bug.cgi?id=1928952
- https://github.com/ImageMagick/ImageMagick/pull/3177
- 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-2021-20241
- https://access.redhat.com/support/policy/updates/errata/
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1929894
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1929895
- https://access.redhat.com/security/cve/cve-2021-20241
- https://github.com/ImageMagick/ImageMagick/commit/dd33b451c3e01098efad34bbaca2df78d5391dc8
- https://github.com/ImageMagick/ImageMagick6/commit/53cb91b3e7bf95d0e372cbc745e0055ac6054745
- https://security-tracker.debian.org/tracker/CVE-2021-20241
- https://ubuntu.com/security/notices/USN-5335-1
- 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-2021-20241
- https://nvd.nist.gov/vuln/detail/CVE-2021-20241
- https://ubuntu.com/security/CVE-2021-20241
Frequently Asked Questions
What is CVE-2021-20241?
CVE-2021-20241 is a vulnerability found in ImageMagick that allows an attacker to trigger undefined behavior through math division by zero.
What is the severity of CVE-2021-20241?
CVE-2021-20241 has a severity rating of 5.5 (medium severity).
How does CVE-2021-20241 affect ImageMagick?
CVE-2021-20241 affects ImageMagick versions 8:6.9.7.4+dfsg-16ubuntu6.14, 8:6.9.10.23+dfsg-2.1ubuntu11.9, 8:6.9.11.60+dfsg-1.3ubuntu0.22.10.1, 8:6.9.11.60+dfsg-1.3ubuntu0.22.04.3+, 8:6.9.11.60+dfsg-1.3ubuntu1, and 8:6.8.9.9-7ubuntu5.16+ on Ubuntu, and versions 8:6.9.10.23+dfsg-2.1+deb10u5 and 8:6.9.11.60+dfsg-1.6 on Debian.
How can I fix CVE-2021-20241 on Ubuntu?
To fix CVE-2021-20241 on Ubuntu, update ImageMagick to versions 8:6.9.7.4+dfsg-16ubuntu6.14, 8:6.9.10.23+dfsg-2.1ubuntu11.9, 8:6.9.11.60+dfsg-1.3ubuntu0.22.10.1, 8:6.9.11.60+dfsg-1.3ubuntu0.22.04.3+, or 8:6.9.11.60+dfsg-1.3ubuntu1.
How can I fix CVE-2021-20241 on Debian?
To fix CVE-2021-20241 on Debian, update ImageMagick to versions 8:6.9.10.23+dfsg-2.1+deb10u5 or 8:6.9.11.60+dfsg-1.6.
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