Overview
This report will discuss the details of a critical vulnerability, CVE-2025-46269, that affects multiple Ashlar-Vellum products. The vulnerability lies in the improper validation of user-supplied data when parsing VC6 files, leading to a potential heap-based buffer overflow. This could have serious implications for system integrity and data security, as it could be leveraged by an attacker to execute arbitrary code in the context of the current process.
Vulnerability Summary
CVE ID: CVE-2025-46269
Severity: High – CVSS Score 7.8
Attack Vector: Local
Privileges Required: None
User Interaction: Required
Impact: Potential system compromise and data leakage
Affected Products
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Product | Affected Versions
Ashlar-Vellum Cobalt | Prior to 12.6.1204.204
Ashlar-Vellum Xenon | Prior to 12.6.1204.204
Ashlar-Vellum Argon | Prior to 12.6.1204.204
Ashlar-Vellum Lithium | Prior to 12.6.1204.204
Ashlar-Vellum Cobalt Share | Prior to 12.6.1204.204
How the Exploit Works
The exploit occurs when the affected applications parse a maliciously crafted VC6 file. Due to improper validation of user-supplied data, a heap-based buffer overflow can be triggered. This can allow the attacker to execute arbitrary code in the context of the current process, potentially compromising the system or leading to data leakage.
Conceptual Example Code
Below is a conceptual example of how the vulnerability might be exploited using a malicious VC6 file:
$ echo "malicious_payload" > exploit.vc6
$ ./vulnerable_application exploit.vc6In this conceptual example, a malicious payload is written into a VC6 file named “exploit.vc6”. This file is then opened in the vulnerable application, triggering the heap-based buffer overflow and executing the malicious payload in the context of the current process.