CVE-2004-0402 in xpcd
Summary
by MITRE
Buffer overflow in xpcd-svga in xpcd before 2.08, and possibly other versions, may allow local users to execute arbitrary code.
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Analysis
by VulDB Data Team • 04/21/2019
The vulnerability identified as CVE-2004-0402 represents a critical buffer overflow flaw within the xpcd-svga component of the xpcd software suite. This issue affects versions prior to 2.08 and potentially other releases in the product line, creating a significant security risk for systems that utilize this software. The vulnerability resides in the xpcd-svga module which is responsible for handling graphics operations and system communications, making it a prime target for exploitation by malicious actors seeking to gain unauthorized system access.
The technical implementation of this buffer overflow stems from inadequate input validation and memory management within the xpcd-svga component. When processing certain input data streams, the software fails to properly bounds-check array allocations, allowing attackers to write data beyond the allocated memory boundaries. This flaw specifically manifests during the handling of graphics-related commands or configuration parameters that are processed by the svga subsystem. The vulnerability is classified as a local privilege escalation issue since exploitation requires local system access, though the potential for arbitrary code execution makes it particularly dangerous in environments where local users might have elevated privileges or where the system is compromised through other attack vectors.
The operational impact of this vulnerability extends beyond simple code execution capabilities, as it represents a fundamental flaw in the software's memory management architecture. Attackers who successfully exploit this vulnerability can potentially execute arbitrary code with the privileges of the affected process, which typically runs with elevated system permissions due to the nature of graphics drivers and system services. This could lead to complete system compromise, data exfiltration, or establishment of persistent backdoors within the affected infrastructure. The local nature of the exploit means that attackers must first gain access to the target system, but once achieved, the vulnerability provides a reliable path to privilege escalation and system control.
From a cybersecurity perspective, this vulnerability aligns with CWE-121, which describes stack-based buffer overflow conditions, and represents a classic example of insecure coding practices that fail to validate input boundaries. The ATT&CK framework categorizes this issue under privilege escalation techniques, specifically targeting the use of local vulnerabilities to gain elevated system access. Organizations should prioritize immediate patching of affected systems and implement additional security controls such as privilege separation, input validation monitoring, and system hardening measures. The vulnerability demonstrates the critical importance of proper memory management in system-level software components and underscores the necessity of regular security assessments and code reviews to identify similar flaws before they can be exploited by malicious actors.