CVE-2024-20697 in Windows
Summary
by MITRE • 01/09/2024
Windows Libarchive Remote Code Execution Vulnerability
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Analysis
by VulDB Data Team • 04/20/2025
The Windows Libarchive remote code execution vulnerability represents a critical security flaw in the libarchive library implementation on Microsoft Windows systems. This vulnerability stems from insufficient input validation and memory handling within the archive processing functions that are commonly used for decompressing various file formats including tar, zip, and other compressed archives. The flaw exists in how the library processes malformed or specially crafted archive files that can trigger buffer overflows, integer overflows, or arbitrary memory access patterns during extraction operations.
The technical implementation of this vulnerability involves the libarchive library's handling of archive headers and metadata structures where attackers can manipulate archive format specifications to cause memory corruption. When Windows applications or services utilize libarchive for processing user-supplied archives without proper validation, malicious inputs can lead to execution of arbitrary code within the context of the vulnerable application. The vulnerability typically manifests through improper bounds checking during parsing of archive entries, particularly when dealing with compressed data streams that exceed allocated buffer sizes or contain malformed size fields.
This vulnerability has significant operational impact across multiple Windows environments as libarchive is integrated into numerous Microsoft applications and third-party software components. Attackers can exploit this flaw by delivering maliciously crafted archive files through various attack vectors including email attachments, web downloads, or file transfer protocols. The remote code execution capability allows threat actors to establish persistent access, escalate privileges, or deploy additional malware payloads on compromised systems. Organizations running Windows servers, desktop environments, or applications that process untrusted archive data are particularly at risk from this vulnerability.
Security professionals should implement immediate mitigation strategies including applying Microsoft security updates, implementing network segmentation controls, and deploying application whitelisting policies to restrict execution of archive processing utilities. The vulnerability aligns with CWE-121 stack-based buffer overflow and CWE-787 out-of-bounds write conditions while mapping to ATT&CK techniques such as T1059 command and scripting interpreter for execution and T1203 exploitation for client access. Organizations should also enhance their incident response procedures to detect potential exploitation attempts through monitoring of archive processing activities and abnormal memory access patterns, ensuring comprehensive coverage of all systems that utilize libarchive functionality for handling external archive data inputs.