CVE-2008-7144 in WinRAR
Summary
by MITRE
Multiple unspecified vulnerabilities in RARLAB WinRAR before 3.71 have unknown impact and attack vectors related to crafted (1) ACE, (2) ARJ, (3) BZ2, (4) CAB, (5) GZ, (6) LHA, (7) RAR, (8) TAR, or (9) ZIP files, as demonstrated by the OUSPG PROTOS GENOME test suite for Archive Formats.
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Analysis
by VulDB Data Team • 08/20/2021
The vulnerability identified as CVE-2008-7144 represents a critical security weakness in RARLAB WinRAR software versions prior to 3.71, affecting multiple archive format parsers including ACE, ARJ, BZ2, CAB, GZ, LHA, RAR, TAR, and ZIP file types. This issue falls under the category of unspecified vulnerabilities that could potentially lead to arbitrary code execution or system compromise when processing specially crafted archive files. The vulnerability was demonstrated through the OUSPG PROTOS GENOME test suite for Archive Formats, indicating that the flaw exists in the core archive extraction and parsing mechanisms of the software. These archive format parsers are fundamental components that handle decompression and extraction of various compressed file types, making them prime targets for exploitation. The unspecified nature of the impact and attack vectors suggests that the vulnerability may manifest differently depending on the specific archive format being processed, potentially creating multiple attack surfaces within the same software component. The vulnerability affects the software's ability to properly validate and parse archive files, particularly when encountering malformed or maliciously constructed archive entries that could trigger buffer overflows, memory corruption, or other exploitable conditions.
The technical flaw in this vulnerability stems from inadequate input validation and memory management within WinRAR's archive parsing routines. When processing compressed files, the software fails to properly sanitize or validate the structure and content of archive entries before attempting to extract or decompress them. This lack of proper validation creates opportunities for attackers to craft malicious archive files that contain malformed data structures, oversized headers, or specially constructed entries designed to exploit memory handling weaknesses in the decompression algorithms. The vulnerability is particularly concerning because it affects multiple archive formats simultaneously, indicating a systemic issue in how WinRAR handles different compression algorithms rather than isolated problems within individual format parsers. The flaw likely involves buffer overflow conditions, integer overflows, or memory corruption issues that occur during the extraction process when the software attempts to allocate memory based on potentially malicious size parameters or when processing malformed archive metadata. These issues typically arise from the complex nature of archive formats, which often contain nested structures, variable-length fields, and compressed data that require careful handling during decompression.
The operational impact of CVE-2008-7144 is severe and potentially catastrophic for systems running vulnerable versions of WinRAR. Attackers could exploit this vulnerability through social engineering campaigns where users unknowingly download and extract malicious archive files from untrusted sources, leading to remote code execution on victim systems. The vulnerability could be leveraged in phishing attacks, malware distribution campaigns, or supply chain attacks where compromised archive files are used to deliver malicious payloads. Organizations relying on WinRAR for document management, software distribution, or backup operations face significant risk, as any user with access to potentially compromised archive files could trigger the exploit. The vulnerability's impact extends beyond individual systems to enterprise environments where archive files are commonly shared through email, file servers, or web applications. The fact that this vulnerability affects multiple archive formats increases the attack surface significantly, as attackers need only find one vulnerable archive file among various formats to compromise systems. The unspecified attack vectors mean that exploitation could occur through various delivery mechanisms, including email attachments, web downloads, or network file transfers, making it particularly difficult to defend against through traditional perimeter security measures.
Mitigation strategies for CVE-2008-7144 should focus on immediate software updates and comprehensive security controls. The primary and most effective mitigation is upgrading to WinRAR version 3.71 or later, which contains patches addressing the unspecified vulnerabilities in the archive parsing components. Organizations should implement strict file access controls and user education programs to prevent users from extracting archive files from untrusted sources. Network-based security controls including email filtering, web application firewalls, and proxy servers should be configured to scan and block potentially malicious archive files before they reach end users. The vulnerability's nature as an archive processing issue makes traditional antivirus solutions less effective, as the exploit typically occurs during the extraction phase rather than during file scanning. Security teams should consider implementing sandboxing mechanisms for archive file processing, particularly for files received through untrusted channels or from unknown senders. System administrators should also monitor for unusual archive file access patterns and implement automated scanning of archive contents where possible. Additionally, organizations should establish clear policies regarding archive file handling and ensure that all users understand the risks associated with extracting files from unknown or untrusted sources. The vulnerability's classification under CWE categories related to buffer overflows and input validation failures emphasizes the importance of proper software development practices and thorough testing of archive processing components. This vulnerability serves as a reminder of the critical importance of keeping archive handling software up to date and implementing defense-in-depth strategies to protect against archive-based attacks.