CVE-2022-2085: Null Pointer Dereference
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 initdeviceprocs defined for the device that uses it as a prototype that depends upon the number of bits per pixel. For bpp > 64, memxdevice is used and does not have an initdeviceprocs 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.
Other sources
Null pointer dereference flaw was found in gxdefaultcreatebufdevice().
https://bugs.ghostscript.com/showbug.cgi?id=704945 http://git.ghostscript.com/?p=ghostpdl.git;h=ae1061d948d88667bdf51d47d918c4684d0f67df
— Red Hat
Affected Software
Remediation
Patch Available
Patch Available
Event History
Frequently Asked Questions
What is the vulnerability ID for this vulnerability?
The vulnerability ID for this vulnerability is CVE-2022-2085.
What is the severity of CVE-2022-2085?
The severity of CVE-2022-2085 is medium.
What software is affected by CVE-2022-2085?
The Artifex Ghostscript version 9.55.0 and Fedora versions 35 and 36 are affected by CVE-2022-2085.
How can this vulnerability be exploited?
This vulnerability can be exploited by an attacker by rendering a large number of bits in memory using Ghostscript.
Are there any references for more information about this vulnerability?
Yes, you can find more information about CVE-2022-2085 at the following references: - [Git Repository](http://git.ghostscript.com/?p=ghostpdl.git%3Bh=ae1061d948d88667bdf51d47d918c4684d0f67df) - [Ghostscript Bug Tracker](https://bugs.ghostscript.com/show_bug.cgi?id=704945) - [Red Hat Bugzilla](https://bugzilla.redhat.com/show_bug.cgi?id=2095261)