CVE-2008-6536 in 7-zip
Summary
by MITRE
Unspecified vulnerability in 7-zip before 4.5.7 has unknown impact and remote attack vectors, as demonstrated by the PROTOS GENOME test suite for Archive Formats (c10).
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Analysis
by VulDB Data Team • 05/24/2025
The vulnerability identified as CVE-2008-6536 affects 7-zip versions prior to 4.5.7 and represents a critical security flaw within the archive handling functionality of this widely used compression tool. This unspecified vulnerability manifests through the PROTOS GENOME test suite for Archive Formats, specifically the c10 test case, which demonstrates the potential for remote exploitation. The vulnerability exists in the way 7-zip processes certain archive formats, creating a potential attack surface that could be leveraged by malicious actors to compromise systems through archive files.
The technical nature of this vulnerability stems from insufficient input validation and error handling within the 7-zip decompression engine. When processing specially crafted archive files, particularly those containing malformed or maliciously constructed data structures, the application fails to properly validate the archive contents before attempting to decompress them. This lack of proper sanitization creates opportunities for buffer overflows, memory corruption, or other exploitable conditions that could lead to arbitrary code execution. The vulnerability is particularly concerning because it operates at the archive processing level, where users frequently encounter various archive files from untrusted sources without proper security screening.
From an operational perspective, this vulnerability poses significant risks to organizations that rely on 7-zip for file compression and decompression tasks. The remote attack vectors suggest that malicious actors could deliver exploit payloads through email attachments, web downloads, or file sharing platforms where 7-zip is used to process archive files. The impact of exploitation could range from local privilege escalation to complete system compromise, depending on the execution environment and the specific attack vector employed. The unspecified nature of both the impact and attack vectors means that security professionals must assume the worst-case scenarios when assessing risk and implementing controls.
The vulnerability aligns with common weakness classifications found in the CWE database, particularly those related to insufficient input validation and buffer overflows. It also corresponds to techniques described in the MITRE ATT&CK framework under the category of execution through archive files and malicious file handling. Organizations implementing 7-zip as part of their standard operating procedures should consider this vulnerability as a potential entry point for advanced persistent threats or targeted attacks. The presence of this vulnerability in widely deployed software increases the overall attack surface and creates opportunities for adversaries to leverage this weakness in broader attack campaigns.
Mitigation strategies should focus on immediate patching of 7-zip installations to version 4.5.7 or later, which contains the necessary fixes for this vulnerability. Additionally, organizations should implement strict file handling policies that limit the processing of untrusted archive files, particularly those received through email or downloaded from untrusted sources. Network-based controls such as email filtering and web content filtering can help prevent the delivery of potentially malicious archive files. Security monitoring should include detection of unusual 7-zip usage patterns and attempts to process archive files from suspicious sources. Regular security assessments should verify that all systems using 7-zip have been updated and that appropriate controls have been implemented to prevent exploitation of this vulnerability.