CVE-2025-2017 in Cobalt
Summary
by MITRE • 03/11/2025
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. Was ZDI-CAN-25240.
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Analysis
by VulDB Data Team • 08/08/2025
The CVE-2025-2017 vulnerability represents a critical buffer overflow flaw in Ashlar-Vellum Cobalt's CO file parsing functionality that enables remote code execution. This vulnerability resides in the software's handling of CO file formats, which are commonly used for data exchange within the application's ecosystem. The flaw manifests when the application processes user-supplied data without adequate length validation, creating a scenario where malicious input can overwrite adjacent memory regions. This type of vulnerability falls under CWE-121, which specifically addresses stack-based buffer overflow conditions, and aligns with ATT&CK technique T1059.007 for command and scripting interpreter execution. The vulnerability's remote exploitability means that attackers can deliver malicious payloads through web-based vectors without requiring local system access.
The technical implementation of this vulnerability occurs during the CO file parsing process where the application fails to validate the length of incoming data before copying it into fixed-size buffers. When a user opens a malicious CO file or visits a web page containing such a file, the parsing routine executes without proper bounds checking, allowing an attacker to craft input data that exceeds the allocated buffer space. This overflow can overwrite return addresses, function pointers, or other critical memory structures, enabling an attacker to redirect execution flow and inject malicious code. The vulnerability requires user interaction as a prerequisite for exploitation, making it a client-side attack vector that relies on social engineering or compromised web services to deliver malicious payloads. The attack surface is particularly concerning given that CO files are legitimate application components that users frequently interact with during normal operations.
The operational impact of this vulnerability extends beyond simple code execution, as it can provide attackers with full system compromise capabilities when the target application runs with elevated privileges. An attacker who successfully exploits this vulnerability can gain complete control over the affected system, potentially leading to data theft, system persistence, or lateral movement within network environments. The vulnerability's classification as a remote code execution flaw means that attackers can exploit it from anywhere on the internet without requiring physical access to the target system. Organizations using Ashlar-Vellum Cobalt software face significant risk exposure, particularly in environments where users have unrestricted access to web content or file downloads from untrusted sources. This vulnerability can be leveraged as an initial access point for more sophisticated attacks, making it a valuable target for threat actors seeking to establish persistent presence within enterprise networks.
Mitigation strategies for CVE-2025-2017 should focus on immediate patch management and operational controls to reduce attack surface. Organizations should prioritize applying vendor-provided security updates as soon as they become available, as these patches typically address the underlying buffer overflow by implementing proper input validation and bounds checking. Network segmentation and access controls can help limit the potential impact if exploitation occurs, while endpoint detection and response solutions should be configured to monitor for suspicious file parsing activities or unusual process execution patterns. Security awareness training for end users remains critical in preventing successful exploitation through social engineering attacks that deliver malicious CO files. Additional protective measures include implementing application whitelisting policies that restrict execution of untrusted CO files, deploying web application firewalls to filter malicious content, and establishing monitoring procedures to detect anomalous behavior associated with the vulnerable parsing routines. The vulnerability's nature as a remote code execution flaw makes layered defense strategies essential for comprehensive protection against potential exploitation attempts.