CVE-2023-34305: Ashlar Cobalt

High severity, CVSS 7.0. EPSS: 0.3% chance of exploitation in the next 30 days.

Ashlar-Vellum Cobalt Out-Of-Bounds Write Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Ashlar-Vellum Cobalt. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The specific flaw exists within the parsing of X_B or X_T files. The issue results from the lack of proper validation of user-supplied data, which can result in a write past the end of an allocated buffer. An attacker can leverage this vulnerability to execute code in the context of the current process. . Was ZDI-CAN-18637.

Affected products

• Ashlar Cobalt: version 12.0.1204.49 only

Published 2024-05-03. Last modified 2026-06-17.