CVE-2023-29539

The Mozilla Foundation Security Advisory describes this flaw as:

When handling the filename directive in the Content-Disposition header, the filename would be truncated if the filename contained a NULL character. This could have led to reflected file download attacks potentially tricking users to install malware.

This vulnerability allows local attackers to escalate privileges on affected installations of Microsoft Windows. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability.
The specific flaw exists within the UMPDDrvEnablePDEV function. The issue results from the lack of proper validation of user-supplied bitmaps prior to processing them. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code in the context of SYSTEM.