CVE-2021-20309: Divide by Zero
First published: Tue Apr 06 2021(Updated: )
A flaw was found in ImageMagick before version 7.0.11 and 6.9.12. A division by zero in WaveImage() of MagickCore/visual-effects.c may trigger undefined behavior via crafted image file. Upstream issue: <a href="https://github.com/ImageMagick/ImageMagick/issues/3296">https://github.com/ImageMagick/ImageMagick/issues/3296</a> Upstream patch: <a href="https://github.com/ImageMagick/ImageMagick/commit/94174beff065cb5683d09d79e992c3ebbdead311">https://github.com/ImageMagick/ImageMagick/commit/94174beff065cb5683d09d79e992c3ebbdead311</a> <a href="https://github.com/ImageMagick/ImageMagick6/commit/f1e68d22d1b35459421710587a0dcbab6900b51f">https://github.com/ImageMagick/ImageMagick6/commit/f1e68d22d1b35459421710587a0dcbab6900b51f</a>
Credit: secalert@redhat.com secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| ImageMagick ImageMagick | <6.9.12 | |
| ImageMagick ImageMagick | >=7.0.0-0<7.0.11-0 | |
| Debian Debian Linux | =9.0 | |
| redhat/ImageMagick | <7.0.11 | 7.0.11 |
| redhat/ImageMagick | <6.9.12 | 6.9.12 |
| 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=1946722
- https://lists.debian.org/debian-lts-announce/2021/06/msg00000.html
- https://lists.debian.org/debian-lts-announce/2023/05/msg00020.html
- https://launchpad.net/bugs/cve/CVE-2021-20309
- https://github.com/ImageMagick/ImageMagick/issues/3296
- https://github.com/ImageMagick/ImageMagick/commit/94174beff065cb5683d09d79e992c3ebbdead311
- https://github.com/ImageMagick/ImageMagick6/commit/f1e68d22d1b35459421710587a0dcbab6900b51f
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1946723
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1946724
- https://access.redhat.com/support/policy/updates/errata/
- https://security-tracker.debian.org/tracker/CVE-2021-20309
- 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-2021-20309
- https://nvd.nist.gov/vuln/detail/CVE-2021-20309
- https://ubuntu.com/security/CVE-2021-20309
Frequently Asked Questions
What is CVE-2021-20309?
CVE-2021-20309 is a vulnerability found in ImageMagick versions before 7.0.11 and before 6.9.12.
How severe is the CVE-2021-20309 vulnerability?
The severity of the CVE-2021-20309 vulnerability is high, with a CVSS score of 7.5.
How does the CVE-2021-20309 vulnerability occur?
The CVE-2021-20309 vulnerability occurs due to a division by zero in the WaveImage() function of ImageMagick's visual-effects.c file.
Which software versions are affected by CVE-2021-20309?
ImageMagick versions before 7.0.11 and before 6.9.12 are affected by CVE-2021-20309.
Are there any fixes available for CVE-2021-20309?
Yes, there are remediation measures available. Please refer to the official Ubuntu and Debian security notices for specific version updates and fixes.
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