ZDI-25-123: (0Day) Ashlar-Vellum Cobalt 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 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 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 Cobalt. 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-2025-2019.
— ZDI
Affected Software
Event History
Frequently Asked Questions
What is the severity of ZDI-25-123?
ZDI-25-123 has a high severity rating due to its potential for remote code execution.
How do I fix ZDI-25-123?
To fix ZDI-25-123, update Ashlar-Vellum Cobalt to the latest version provided by the vendor.
What type of vulnerability is ZDI-25-123?
ZDI-25-123 is classified as a remote code execution vulnerability that requires user interaction.
Which software is affected by ZDI-25-123?
ZDI-25-123 specifically affects Ashlar-Vellum Cobalt installations.
Is user interaction required to exploit ZDI-25-123?
Yes, exploitation of ZDI-25-123 requires user interaction, such as visiting a malicious web page or opening a malicious file.