CVE-2020-27760
Published: 3 December 2020
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.
Priority
Status
| Package | Release | Status |
|---|---|---|
|
imagemagick Launchpad, Ubuntu, Debian |
impish |
Not vulnerable
(8:6.9.11.60+dfsg-1ubuntu1)
|
| xenial |
Released
(8:6.8.9.9-7ubuntu5.16+esm2)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only) |
|
| kinetic |
Not vulnerable
(8:6.9.11.60+dfsg-1ubuntu1)
|
|
| bionic |
Released
(8:6.9.7.4+dfsg-16ubuntu6.11)
|
|
| focal |
Released
(8:6.9.10.23+dfsg-2.1ubuntu11.4)
|
|
| groovy |
Released
(8:6.9.10.23+dfsg-2.1ubuntu13.3)
|
|
| hirsute |
Not vulnerable
(8:6.9.11.60+dfsg-1ubuntu1)
|
|
| jammy |
Not vulnerable
(8:6.9.11.60+dfsg-1ubuntu1)
|
|
| lunar |
Not vulnerable
(8:6.9.11.60+dfsg-1ubuntu1)
|
|
| trusty |
Needed
|
|
| upstream |
Released
(8:6.9.11.24+dfsg-1)
|
|
|
Patches: upstream: https://github.com/ImageMagick/ImageMagick6/commit/83cd04f580ccf4cc194813777c1fcfba78e602aa |
||
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 5.5 |
| Attack vector | Local |
| Attack complexity | Low |
| Privileges required | None |
| User interaction | Required |
| Scope | Unchanged |
| Confidentiality | None |
| Integrity impact | None |
| Availability impact | High |
| Vector | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H |