ZDI-25-121: (0Day) Ashlar-Vellum Cobalt CO File Parsing Buffer Overflow Remote Code Execution Vulnerability
First published: Mon Mar 10 2025(Updated: )
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.
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Ashlar-Vellum Cobalt | ||
| Ashlar-Vellum Cobalt |
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Reference Links
Frequently Asked Questions
What is the severity of ZDI-25-121?
ZDI-25-121 has a high severity due to its potential for remote code execution.
How do I fix ZDI-25-121?
To fix ZDI-25-121, ensure you apply the latest security patches provided by Ashlar-Vellum for Cobalt.
What are the exploitation requirements for ZDI-25-121?
Exploitation of ZDI-25-121 requires user interaction, specifically visiting a malicious page or opening a malicious file.
What can attackers do with ZDI-25-121?
Attackers can execute arbitrary code on affected installations of Ashlar-Vellum Cobalt if ZDI-25-121 is exploited.
Which software is affected by ZDI-25-121?
ZDI-25-121 affects installations of Ashlar-Vellum Cobalt.
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- alias/ZDI-CAN-25240
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- alias/CVE-2025-2017
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- vendor/ashlar-vellum
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