CVE-2004-1437 in Pavuk
Summary
by MITRE
Multiple buffer overflows in the digest authentication functionality in Pavuk 0.9.28-r2 and earlier allow remote attackers to execute arbitrary code.
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Analysis
by VulDB Data Team • 12/29/2024
The vulnerability identified as CVE-2004-1437 represents a critical security flaw affecting Pavuk web client version 0.9.28-r2 and earlier. This issue stems from improper handling of authentication data within the digest authentication mechanism, creating exploitable buffer overflow conditions that can be leveraged by remote attackers to gain arbitrary code execution privileges on affected systems. The vulnerability specifically targets the authentication functionality that processes HTTP digest authentication challenges, which are commonly used to secure web resources and control access to protected content.
The technical implementation of this vulnerability involves buffer overflow conditions occurring during the processing of specially crafted authentication headers sent by malicious actors. When Pavuk encounters malformed or excessively long authentication data during digest authentication, the software fails to properly validate input lengths before copying data into fixed-size buffers. This classic buffer overflow scenario allows attackers to overwrite adjacent memory locations, potentially including return addresses and function pointers, thereby enabling code execution control. The flaw manifests in multiple locations within the authentication processing code where string operations are performed without adequate bounds checking, making the vulnerability particularly dangerous as it can be triggered through various authentication-related interactions.
The operational impact of CVE-2004-1437 extends beyond simple remote code execution, as it can be exploited to compromise entire web infrastructure components that rely on Pavuk for automated web content retrieval and processing. Attackers can leverage this vulnerability to install backdoors, modify web content, steal sensitive information, or use compromised systems as launching points for further attacks within network environments. The vulnerability affects systems where Pavuk is used for web crawling, automated content retrieval, or web application testing, making it particularly concerning for organizations that depend on this tool for routine operations. Given the age of the affected software version, many systems may still be running vulnerable configurations without proper patching, amplifying the potential attack surface.
Security mitigations for this vulnerability should prioritize immediate software updates to versions that address the buffer overflow conditions in digest authentication processing. Organizations should implement network segmentation and access controls to limit exposure of systems running Pavuk, particularly those accessible from untrusted networks. Input validation should be enhanced at all levels of authentication processing, with bounds checking implemented for all string operations involving authentication headers. The vulnerability aligns with CWE-121, which describes stack-based buffer overflow conditions, and can be mapped to ATT&CK technique T1190 for exploiting vulnerabilities in software applications. Regular security assessments and penetration testing should be conducted to identify similar buffer overflow vulnerabilities in other legacy applications, while implementing proper memory safety practices and automated code review processes to prevent future occurrences of such critical flaws in software development lifecycle.