CVE-2020-27771
Published: 4 December 2020
In RestoreMSCWarning() of /coders/pdf.c there are several areas where calls to GetPixelIndex() could result in values outside the range of representable for the unsigned char type. The patch casts the return value of GetPixelIndex() to ssize_t type to avoid this bug. This undefined behavior could be triggered when ImageMagick processes a crafted pdf file. Red Hat Product Security marked this as Low severity because although it could potentially lead to an impact to application availability, no specific impact was demonstrated in this case. This flaw affects ImageMagick versions prior to 7.0.9-0.
Priority
Status
| Package | Release | Status |
|---|---|---|
|
imagemagick Launchpad, Ubuntu, Debian |
hirsute |
Not vulnerable
(8:6.9.11.60+dfsg-1ubuntu1)
|
| focal |
Released
(8:6.9.10.23+dfsg-2.1ubuntu11.4)
|
|
| groovy |
Released
(8:6.9.10.23+dfsg-2.1ubuntu13.3)
|
|
| impish |
Not vulnerable
(8:6.9.11.60+dfsg-1ubuntu1)
|
|
| upstream |
Released
(8:6.9.11.24+dfsg-1)
|
|
| bionic |
Released
(8:6.9.7.4+dfsg-16ubuntu6.11)
|
|
| trusty |
Needed
|
|
| jammy |
Not vulnerable
(8:6.9.11.60+dfsg-1ubuntu1)
|
|
| kinetic |
Not vulnerable
(8:6.9.11.60+dfsg-1ubuntu1)
|
|
| xenial |
Needed
|
|
| lunar |
Not vulnerable
(8:6.9.11.60+dfsg-1ubuntu1)
|
|
|
Patches: upstream: https://github.com/ImageMagick/ImageMagick6/commit/a07ecde4c1c3a3efaa628434adc903295f6bb2b3 |
||
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 3.3 |
| Attack vector | Local |
| Attack complexity | Low |
| Privileges required | None |
| User interaction | Required |
| Scope | Unchanged |
| Confidentiality | None |
| Integrity impact | None |
| Availability impact | Low |
| Vector | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L |