CVE-2020-36773
Published: 4 February 2024
Artifex Ghostscript before 9.53.0 has an out-of-bounds write and use-after-free in devices/vector/gdevtxtw.c (for txtwrite) because a single character code in a PDF document can map to more than one Unicode code point (e.g., for a ligature).
Notes
| Author | Note |
|---|---|
| mdeslaur | This issue was introduced in 9.51 as described in the patch. The reproducer doesn't work on focal. |
Priority
Status
| Package | Release | Status |
|---|---|---|
|
ghostscript Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
|
| focal |
Not vulnerable
(9.50~dfsg-5ubuntu4.11)
|
|
| jammy |
Not vulnerable
(9.55.0~dfsg1-0ubuntu5.5)
|
|
| mantic |
Not vulnerable
|
|
| noble |
Not vulnerable
|
|
| trusty |
Ignored
(end of standard support)
|
|
| upstream |
Released
(9.53.0~dfsg-1)
|
|
| xenial |
Not vulnerable
|
|
|
Patches: upstream: https://git.ghostscript.com/?p=ghostpdl.git;h=8c7bd787defa071c96289b7da9397f673fddb874 |
||
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 9.8 |
| Attack vector | Network |
| Attack complexity | Low |
| Privileges required | None |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | High |
| Integrity impact | High |
| Availability impact | High |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |