| Name | CVE-2020-27760 |
| Description | In `GammaImage()` of /MagickCore/enhance.c, depending on the `gamma` value, it's possible to trigger a divide-by-zero condition when a crafted input file is processed by ImageMagick. This could lead to an impact to application availability. The patch uses the `PerceptibleReciprocal()` to prevent the divide-by-zero from occurring. This flaw affects ImageMagick versions prior to ImageMagick 7.0.8-68. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DLA-2523-1, DLA-3357-1 |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| imagemagick (PTS) | buster | 8:6.9.10.23+dfsg-2.1+deb10u1 | vulnerable |
| buster (security) | 8:6.9.10.23+dfsg-2.1+deb10u5 | fixed | |
| bullseye (security), bullseye | 8:6.9.11.60+dfsg-1.3+deb11u1 | fixed | |
| sid, trixie, bookworm | 8:6.9.11.60+dfsg-1.6 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| imagemagick | source | stretch | 8:6.9.7.4+dfsg-11+deb9u11 | DLA-2523-1 | ||
| imagemagick | source | buster | 8:6.9.10.23+dfsg-2.1+deb10u2 | DLA-3357-1 | ||
| imagemagick | source | (unstable) | 8:6.9.11.24+dfsg-1 |
https://github.com/ImageMagick/ImageMagick/issues/1717
ImageMagick: https://github.com/ImageMagick/ImageMagick/commit/c5fcdea6a6ae27cf3db20c28b176e87b1a584e06
ImageMagick6: https://github.com/ImageMagick/ImageMagick6/commit/83cd04f580ccf4cc194813777c1fcfba78e602aa