Ashlar-Vellum Cobalt VS File Parser type confusion

Summaryinfo

A vulnerability was found in Ashlar-Vellum Cobalt. It has been declared as critical. Affected by this vulnerability is an unknown functionality of the component VS File Parser. Executing a manipulation can lead to type confusion. This vulnerability is registered as CVE-2025-2015. It is possible to launch the attack remotely. No exploit is available.

Detailsinfo

A vulnerability has been found in Ashlar-Vellum Cobalt (version now known) and classified as critical. This vulnerability affects some unknown processing of the component VS File Parser. The manipulation with an unknown input leads to a type confusion vulnerability. The CWE definition for the vulnerability is CWE-843. The product allocates or initializes a resource such as a pointer, object, or variable using one type, but it later accesses that resource using a type that is incompatible with the original type. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

Ashlar-Vellum Cobalt VS File Parsing Type Confusion Remote Code Execution Vulnerability. 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 VS files. The issue results from the lack of proper validation of user-supplied data, which can result in a type confusion condition. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-25236.

The advisory is shared for download at zerodayinitiative.com. This vulnerability was named CVE-2025-2015 since 03/05/2025. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 08/08/2025).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Vendor

• Ashlar-Vellum

Name

• Cobalt

License

• commercial

CPE 2.3info

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CPE 2.2info

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