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5.5
CVE-2020-27756: ImageMagick: Divide-by-zero error in image size calculations
CVE-2020-27756 · published 5 years ago
Summary
A bug in ImageMagick's image size calculations can cause the program to behave unexpectedly, potentially making it unavailable. This affects older versions of ImageMagick. To fix, update to version 7.0.9-0 or later.
What to do
The CVE record does not list a fixed version. Check the vendor's site or the advisory links below - a fix may already be released.
Affected software
| Vendor | Product | Affected versions |
|---|---|---|
| imagemagick | imagemagick |
>= 6.9.9-34, < 6.9.10-69 >= 7.0.0-0, < 7.0.9-0 cpe:2.3:a:imagemagick:imagemagick:*:*:*:*:*:*:*:* |
Original advisory text
In ParseMetaGeometry() of MagickCore/geometry.c, image height and width calculations can lead to divide-by-zero conditions which also lead to undefined behavior. This flaw can be triggered by a cra...
In ParseMetaGeometry() of MagickCore/geometry.c, image height and width calculations can lead to divide-by-zero conditions which also lead to undefined behavior. This flaw can be triggered by a crafted input file processed by ImageMagick and could impact application availability. The patch uses multiplication in addition to the function `PerceptibleReciprocal()` in order to prevent such divide-by-zero conditions. This flaw affects ImageMagick versions prior to 7.0.9-0.
References
- https://bugzilla.redhat.com/show_bug.cgi?id=1894233 Exploit Issue Tracking Patch Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2023/03/msg00008.html
Internet-facing
60 days
Internal
At next upgrade
- Not known to be exploited
- Needs hands-on effort to exploit (estimated)
- Gives an attacker partial control (estimated)
Type
CWE-369Divide By Zero
Timeline
Published8 Dec 2020
Updated4 Nov 2026
First seen9 Jul 2026
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