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Vulnerability DatabaseCVE-2024-40898

CVE-2024-40898: 
Apache HTTP Server vulnerability analysis and mitigation

Overview

A Server-Side Request Forgery (SSRF) vulnerability was discovered in Apache HTTP Server versions 2.4.0 through 2.4.61 when running on Windows systems with modrewrite configured in server/vhost context. The vulnerability (CVE-2024-40898) was discovered in July 2024 and allows potential leakage of NTLM hashes to a malicious server through SSRF and crafted requests ([Apache Advisory](https://httpd.apache.org/security/vulnerabilities24.html), NVD).

Technical details

The vulnerability specifically affects Apache HTTP Server installations on Windows systems where mod_rewrite is configured in server or virtual host context. The CVSS v3.1 base score is 7.5 (HIGH) according to NVD's assessment, with a vector string of CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N. CISA's ADP assessment rates it even higher at 9.1 (CRITICAL) with a vector string of CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N (NVD).

Impact

The primary impact of this vulnerability is the potential exposure of sensitive information through the leakage of NTLM hashes to malicious servers. This could lead to unauthorized access and potential credential theft, particularly affecting Windows-based Apache HTTP Server deployments (Censys Report).

Mitigation and workarounds

The primary mitigation is to upgrade to Apache HTTP Server version 2.4.62, which contains the fix for this vulnerability. This upgrade is strongly recommended for all affected installations (Apache Advisory).

Additional resources

Source: This report was generated using AI

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