ZDI-CAN-25477: ZDI-25-635: (0Day) Ashlar-Vellum Graphite VC6 File Parsing Heap-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 heap-based buffer. An attacker can leverage this vulnerability to execute code in the context of the current process.
Other sources
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 ZDI has assigned a CVSS rating of 7.8. The following CVEs are assigned: CVE-2025-7983.
— ZDI
Affected Software
Event History
Frequently Asked Questions
What is the severity of ZDI-CAN-25477?
The severity of ZDI-CAN-25477 is high, as it allows remote code execution on affected installations.
How do I fix ZDI-CAN-25477?
To fix ZDI-CAN-25477, ensure that you update Ashlar-Vellum Graphite to the latest version provided by the vendor.
What types of attacks can be carried out using ZDI-CAN-25477?
ZDI-CAN-25477 can be exploited to execute arbitrary code, which may lead to unauthorized access or control over the affected system.
Is user interaction required for exploiting ZDI-CAN-25477?
Yes, user interaction is required as the target must visit a malicious page or open a malicious file to exploit ZDI-CAN-25477.
Which software is affected by ZDI-CAN-25477?
The vulnerability ZDI-CAN-25477 specifically affects Ashlar-Vellum Graphite installations.