CVE-2025-2020: Ashlar-Vellum Cobalt VC6 File Parsing Out-Of-Bounds Write Remote Code Execution Vulnerability
Description
Ashlar-Vellum Cobalt VC6 File Parsing Out-Of-Bounds Write 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 user-supplied data, which can result in a write past the end of an allocated buffer. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-25254.
Classification
CVE ID: CVE-2025-2020
CVSS Base Severity: HIGH
CVSS Base Score: 7.8
CVSS Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Problem Types
CWE-787: Out-of-bounds WriteAffected Products
Vendor: Ashlar-Vellum
Product: Cobalt
Exploit Prediction Scoring System (EPSS)
EPSS Score: 0.06% (probability of being exploited)
EPSS Percentile: 14.21% (scored less or equal to compared to others)
EPSS Date: 2025-04-09 (when was this score calculated)
References
https://nvd.nist.gov/vuln/detail/CVE-2025-2020https://www.zerodayinitiative.com/advisories/ZDI-25-124/