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 |