ZDI-CAN-25240: ZDI-25-121: (0Day) Ashlar-Vellum Cobalt CO File Parsing 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 CO files. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a 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-2025-2017.
— ZDI
Affected Software
Event History
Frequently Asked Questions
What is the severity of ZDI-CAN-25240?
ZDI-CAN-25240 has a high severity rating due to its ability to allow remote code execution on affected installations.
How do I fix ZDI-CAN-25240?
To fix ZDI-CAN-25240, update your Ashlar-Vellum Cobalt software to the latest version provided by the vendor.
What types of attacks can ZDI-CAN-25240 facilitate?
ZDI-CAN-25240 can facilitate remote code execution attacks if a user interacts with a malicious web page or file.
Is user interaction required for ZDI-CAN-25240 exploitation?
Yes, user interaction is required for the exploitation of ZDI-CAN-25240 as the target must visit a malicious page or open a malicious file.
Which software is affected by ZDI-CAN-25240?
ZDI-CAN-25240 affects installations of Ashlar-Vellum Cobalt.