(0Day) Ashlar-Vellum Cobalt CO File Parsing Use-After-Free Remote Code Execution Vulnerability
Vulnerability 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 CO files. The issue results from the lack of validating the existence of an object prior to performing operations on the object. An attacker can leverage this vulnerability to execute code in the context of the current process.
Additional Details
04/14/25 – ZDI reported the vulnerability to the vendor
04/23/25 – the vendor acknowledged the receipt of the report
07/30/25 – ZDI asked for updates
08/06/25 - ZDI asked for updates
09/24/25 - 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.
Disclosure Timeline
- 2025-04-14 - Vulnerability reported to vendor
- 2025-10-16 - Coordinated public release of advisory
- 2025-10-16 - Advisory Updated
Credit
Rocco Calvi (@TecR0c) with TecSecurity
