CVE-2022-2085
Published: 16 June 2022
A NULL pointer dereference vulnerability was found in Ghostscript, which occurs when it tries to render a large number of bits in memory. When allocating a buffer device, it relies on an init_device_procs defined for the device that uses it as a prototype that depends upon the number of bits per pixel. For bpp > 64, mem_x_device is used and does not have an init_device_procs defined. This flaw allows an attacker to parse a large number of bits (more than 64 bits per pixel), which triggers a NULL pointer dereference flaw, causing an application to crash.
Notes
| Author | Note |
|---|---|
| mdeslaur | code in focal and earlier doesn't look vulnerable to this issue |
Priority
Status
| Package | Release | Status |
|---|---|---|
|
ghostscript Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(9.26~dfsg+0-0ubuntu0.18.04.16)
|
| focal |
Not vulnerable
(9.50~dfsg-5ubuntu4.5)
|
|
| impish |
Ignored
(end of life)
|
|
| jammy |
Released
(9.55.0~dfsg1-0ubuntu5.1)
|
|
| kinetic |
Not vulnerable
(9.56.1~dfsg1-0ubuntu3)
|
|
| upstream |
Released
(9.56.0~dfsg-1)
|
|
| xenial |
Not vulnerable
|
|
|
Patches: upstream: https://git.ghostscript.com/?p=ghostpdl.git;h=ae1061d948d88667bdf51d47d918c4684d0f67df |
||
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 |