Advisory Details

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 AR files. The issue results from the lack of proper validation of user-supplied data, which can result in a read past the end of an allocated data structure. An attacker can leverage this vulnerability to execute code in the context of the current process.

12/19/24 – ZDI reported the vulnerability to the vendor
05/02/25 - ZDI asked for updates
07/15/25 – ZDI notified the vendor of the intention to publish the case as a 0-day advisory

-- Mitigation: Given the nature of the vulnerability, the only salient mitigation strategy is to restrict interaction with the product

• 2024-12-19 - Vulnerability reported to vendor
• 2025-07-22 - Coordinated public release of advisory
• 2025-07-22 - Advisory Updated