CVE-2021-20245: Divide by Zero
First published: Mon Feb 15 2021(Updated: )
A flaw was found in ImageMagick in coders/webp.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. This would most likely lead to an impact to application availability, but could potentially cause other problems related to undefined behavior. This flaw affects ImageMagick versions prior to 7.0.10-62. Upstream issue: <a href="https://github.com/ImageMagick/ImageMagick/issues/3176">https://github.com/ImageMagick/ImageMagick/issues/3176</a>
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 | <8:6.9.11.60+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 |
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Reference Links
- https://bugzilla.redhat.com/show_bug.cgi?id=1928943
- https://github.com/ImageMagick/ImageMagick/issues/3176
- 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-2021-20245
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1929889
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1929890
- https://github.com/ImageMagick/ImageMagick6/commit/a78d92dc0f468e79c3d761aae9707042952cdaca
- https://access.redhat.com/support/policy/updates/errata/
- https://access.redhat.com/security/cve/cve-2021-20245
- https://github.com/ImageMagick/ImageMagick/commit/ffb683e62ddedc6436a1b88388eb690d7ca57bf2
- https://security-tracker.debian.org/tracker/CVE-2021-20245
- https://ubuntu.com/security/notices/USN-5736-1
- https://ubuntu.com/security/notices/USN-5736-2
- https://www.cve.org/CVERecord?id=CVE-2021-20245
- https://nvd.nist.gov/vuln/detail/CVE-2021-20245
- https://ubuntu.com/security/CVE-2021-20245
Frequently Asked Questions
What is CVE-2021-20245?
CVE-2021-20245 is a vulnerability found in ImageMagick in coders/webp.c that could trigger undefined behavior in the form of math division by zero.
How does CVE-2021-20245 affect ImageMagick?
CVE-2021-20245 affects ImageMagick by allowing an attacker to submit a crafted file that triggers the vulnerability.
What is the severity of CVE-2021-20245?
The severity of CVE-2021-20245 is high with a severity value of 5.5.
Which versions of ImageMagick are affected by CVE-2021-20245?
CVE-2021-20245 affects ImageMagick versions 8:6.9.11.60+dfsg-1.3ubuntu0.22.04.3+ and 8:6.9.11.60+dfsg-1.3ubuntu0.22.10.1.
How can I fix CVE-2021-20245 in ImageMagick?
To fix CVE-2021-20245 in ImageMagick, update to version 8:6.9.11.60+dfsg-1.3ubuntu0.22.04.3+ or 8:6.9.11.60+dfsg-1.3ubuntu0.22.10.1.
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