CVE-2021-20176: Divide by Zero
First published: Fri Jan 15 2021(Updated: )
A divide-by-zero flaw was found in ImageMagick 6.9.11-57 and 7.0.10-57 in gem.c. This flaw allows an attacker who submits a crafted file that is processed by ImageMagick to trigger undefined behavior through a 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 | <6.9.11-57 | |
| ImageMagick ImageMagick | >=7.0.0-0<7.0.10-56 | |
| Debian Debian Linux | =9.0 | |
| redhat/ImageMagick 6.9.11 | <57 | 57 |
| redhat/ImageMagick 7.0.10 | <57 | 57 |
| ubuntu/imagemagick | <8:6.9.7.4+dfsg-16ubuntu6.11 | 8:6.9.7.4+dfsg-16ubuntu6.11 |
| ubuntu/imagemagick | <8:6.9.10.23+dfsg-2.1ubuntu11.4 | 8:6.9.10.23+dfsg-2.1ubuntu11.4 |
| ubuntu/imagemagick | <8:6.9.10.23+dfsg-2.1ubuntu13.3 | 8:6.9.10.23+dfsg-2.1ubuntu13.3 |
| ubuntu/imagemagick | <8:6.9.11.57+dfsg-1 | 8:6.9.11.57+dfsg-1 |
| ubuntu/imagemagick | <8:6.8.9.9-7ubuntu5.16+ | 8:6.8.9.9-7ubuntu5.16+ |
| 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 |
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Reference Links
- https://bugzilla.redhat.com/show_bug.cgi?id=1916610
- 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-2021-20176
- https://github.com/ImageMagick/ImageMagick/issues/3077
- https://github.com/ImageMagick/ImageMagick/commit/fbd9a963db1ae5551c45dc8af57db0abd7695774
- https://github.com/ImageMagick/ImageMagick6/commit/90255f0834eead08d59f46b0bda7b1580451cc0f
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1920270
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1916611
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1925097
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1925096
- https://github.com/ImageMagick/ImageMagick/commit/9c06496defe3e28e90da780f09baeb40f7d496ae
- https://github.com/ImageMagick/ImageMagick6/commit/d348259b3bffa12d6aeb308fffd6e572c4d62786
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1928957
- https://github.com/ImageMagick/ImageMagick/pull/3192
- https://security-tracker.debian.org/tracker/CVE-2021-20176
- https://ubuntu.com/security/notices/USN-4988-1
- https://ubuntu.com/security/notices/USN-5335-1
- https://www.cve.org/CVERecord?id=CVE-2021-20176
- https://nvd.nist.gov/vuln/detail/CVE-2021-20176
- https://ubuntu.com/security/CVE-2021-20176
Frequently Asked Questions
What is CVE-2021-20176?
CVE-2021-20176 is a divide-by-zero vulnerability found in ImageMagick 6.9.11-57 and 7.0.10-57.
How does CVE-2021-20176 impact system availability?
CVE-2021-20176 can cause system unavailability.
What is the severity of CVE-2021-20176?
The severity of CVE-2021-20176 is medium with a severity value of 5.5.
Which software versions are affected by CVE-2021-20176?
ImageMagick versions 6.9.11-57 and 7.0.10-57 are affected by CVE-2021-20176.
How can I fix CVE-2021-20176?
To fix CVE-2021-20176, update ImageMagick to a version that includes the fix.
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