CVE-2025-2021

(0Day) Ashlar-Vellum Cobalt XE File Parsing Integer Overflow 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 XE files. The issue results from the lack of proper validation of user-supplied data, which can result in an integer overflow before writing to memory. An attacker can leverage this vulnerability to execute code in the context of the current process.

ADDITIONAL DETAILS

09/26/24 – ZDI reported the vulnerability to the vendor

09/26/24 – the vendor acknowledged the receipt of the report

01/13/25 - ZDI asked for updates

01/17/25 – ZDI notified the vendor of the intention to publish the case as a  0-day advisory