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 initialization of memory prior to accessing it. An attacker can leverage this vulnerability to execute code in the context of the current process.

11/21/24 – ZDI reported the vulnerability to the vendor
11/22/24 – the vendor acknowledged the receipt of the report
03/12/25 - ZDI asked for updates
03/20/25 – the vendor confirmed that resolving the issue was in progress
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

• 2024-11-21 - Vulnerability reported to vendor
• 2025-07-22 - Coordinated public release of advisory
• 2025-07-22 - Advisory Updated