(0Day) Ashlar-Vellum Cobalt AR File Parsing Uninitialized Variable Remote Code Execution Vulnerability
Rocco Calvi
ZDI ID: ZDI-25-636
ZDI-CAN: ZDI-CAN-25700
- CVSS
- 7.8 AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- Affected Vendors
- Ashlar-Vellum
- Affected Products
- Cobalt
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 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.
Additional Details
Disclosure Timeline
- 2024-11-21 — Vulnerability reported to vendor
- 2025-07-22 — Coordinated public release of advisory