| Name | CVE-2020-27756 |
| Description | 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. |
| 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-3357-1 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| imagemagick (PTS) | jessie, jessie (lts) | 8:6.8.9.9-5+deb8u26 | fixed |
| stretch (security) | 8:6.9.7.4+dfsg-11+deb9u14 | fixed |
| stretch (lts), stretch | 8:6.9.7.4+dfsg-11+deb9u19 | fixed |
| buster | 8:6.9.10.23+dfsg-2.1+deb10u1 | vulnerable |
| buster (security) | 8:6.9.10.23+dfsg-2.1+deb10u7 | fixed |
| bullseye | 8:6.9.11.60+dfsg-1.3+deb11u2 | fixed |
| bullseye (security) | 8:6.9.11.60+dfsg-1.3+deb11u3 | fixed |
| bookworm | 8:6.9.11.60+dfsg-1.6 | fixed |
| bookworm (security) | 8:6.9.11.60+dfsg-1.6+deb12u1 | fixed |
| trixie | 8:6.9.12.98+dfsg1-5 | fixed |
| sid | 8:6.9.12.98+dfsg1-5.2 | fixed |
The information below is based on the following data on fixed versions.
Notes
[stretch] - imagemagick <not-affected> (Vulnerable code introduced later)
https://github.com/ImageMagick/ImageMagick/issues/1725
ImageMagick: https://github.com/ImageMagick/ImageMagick/commit/f35eca82b0c294ff9d0ccad104a881c3ae2ba913
ImageMagick6: https://github.com/ImageMagick/ImageMagick6/commit/d3d96f05950275b916207bf9df03640ef3e9fd6e
Introduced in https://github.com/ImageMagick/ImageMagick6/commit/7dd318e6f7f86eb41e474e3131c59ea26af6c1b2 (6.9.9-34)
[jessie] - imagemagick <not-affected> (Vulnerable code introduced later)