Ashlar-Vellum Graphite VC6 File Parser stack-based overflow

Summaryinfo

A vulnerability described as critical has been identified in Ashlar-Vellum Graphite. This affects an unknown part of the component VC6 File Parser. Executing a manipulation can lead to stack-based overflow. This vulnerability appears as CVE-2025-7979. The attack may be performed from remote. There is no available exploit.

Detailsinfo

A vulnerability has been found in Ashlar-Vellum Graphite (unknown version) and classified as critical. This vulnerability affects an unknown code block of the component VC6 File Parser. The manipulation with an unknown input leads to a stack-based overflow vulnerability. The CWE definition for the vulnerability is CWE-121. A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function). As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

Ashlar-Vellum Graphite VC6 File Parsing Stack-based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Ashlar-Vellum Graphite. 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 VC6 files. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-25463.

The advisory is shared for download at zerodayinitiative.com. This vulnerability was named CVE-2025-7979. 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 09/18/2025).

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

• Graphite

License

• commercial

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