CVE-2023-34293 in Cobalt
Summary
by MITRE • 05/03/2024
Ashlar-Vellum Cobalt 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 X_B or X_T 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-18636.
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Analysis
by VulDB Data Team • 08/07/2025
The CVE-2023-34293 vulnerability represents a critical out-of-bounds write flaw in Ashlar-Vellum Cobalt software that enables remote code execution through a sophisticated buffer overflow attack. This vulnerability specifically targets the parsing mechanisms of X_B and X_T file formats, which are commonly used within the Cobalt application for processing structured data. The flaw stems from inadequate input validation procedures that fail to properly sanitize user-supplied data during file parsing operations. When the application processes maliciously crafted X_B or X_T files, it attempts to write data beyond the boundaries of allocated memory buffers, creating a condition that can be exploited by remote attackers to gain unauthorized code execution privileges. This type of vulnerability falls under the CWE-787 category of out-of-bounds write conditions, which are particularly dangerous as they can lead to arbitrary code execution and system compromise. The vulnerability requires user interaction to be exploited, meaning that victims must either visit a malicious web page or open a specially crafted malicious file for the attack to succeed, making it particularly insidious in phishing and social engineering campaigns. The attack vector aligns with ATT&CK technique T1203, which involves gaining access through malicious file execution, and demonstrates how file format parsing vulnerabilities can be leveraged for remote code execution. The out-of-bounds write condition creates a predictable memory corruption scenario that attackers can manipulate to overwrite critical program memory locations, potentially allowing them to redirect program execution flow and inject malicious code into the running process. This vulnerability represents a significant risk to organizations using Ashlar-Vellum Cobalt software, as successful exploitation can result in complete system compromise, data theft, and persistent backdoor access. The security implications extend beyond simple code execution, as the vulnerability may also enable privilege escalation attacks and provide attackers with a foothold for further network infiltration. Organizations should prioritize patching this vulnerability immediately, as it represents a high-severity threat that can be exploited remotely without requiring elevated privileges. The vulnerability's classification as a remote code execution flaw underscores the critical importance of maintaining up-to-date software versions and implementing robust input validation controls to prevent similar issues from occurring in other applications. The flaw highlights the necessity of defensive programming practices, including proper bounds checking and input sanitization, to prevent buffer overflow conditions that can be exploited for unauthorized code execution. Security professionals should monitor for exploitation attempts and implement network-based detection measures to identify potential attacks targeting this specific vulnerability. The vulnerability's impact is amplified by its ability to execute code in the context of the current process, which means that successful exploitation can result in complete system compromise without requiring additional privilege escalation techniques. This particular vulnerability demonstrates how seemingly routine file parsing operations can contain critical security flaws that can be exploited remotely by attackers with minimal user interaction requirements. The security community should consider this vulnerability as part of broader efforts to improve software security practices and emphasize the importance of thorough code review processes that identify potential buffer overflow conditions during the development lifecycle.