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CVE-2024-38475

9.1 · CRITICALActively Exploited

Improper escaping of output in mod_rewrite in Apache HTTP Server 2.4.59 and earlier allows an attacker to map URLs to filesystem locations that are permitted to be served by the server but are not…

Published Jul 1, 2024CWE-116EPSS 99.96%

Overview

CVE-2024-38475 is a critical-severity vulnerability. It was published on July 1, 2024 and has a CVSS 3.1 base score of 9.1 (CRITICAL). This vulnerability is listed in CISA's Known Exploited Vulnerabilities catalog, indicating active exploitation in the wild.

This vulnerability has a CVSS 3.1 base score of 9.1, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

Improper escaping of output in mod_rewrite in Apache HTTP Server 2.4.59 and earlier allows an attacker to map URLs to filesystem locations that are permitted to be served by the server but are not intentionally/directly reachable by any URL, resulting in code execution or source code disclosure.

Substitutions in server context that use a backreferences or variables as the first segment of the substitution are affected.  Some unsafe RewiteRules will be broken by this change and the rewrite flag "UnsafePrefixStat" can be used to opt back in once ensuring the substitution is appropriately constrained.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refhttpd.apache.org/security/vulnerabilities_24.htmlRefsecurity.netapp.com/advisory/ntap-20240712-0001/Refwww.openwall.com/lists/oss-security/2024/07/01/8GitHubgithub.com/apache/httpd/commit/9a6157d1e2f7ab15963020381054b48782bc18cfRefhttpd.apache.org/security/vulnerabilities_24.htmlRefpsirt.global.sonicwall.com/vuln-detail/SNWLID-2024-0018Refsecurity.netapp.com/advisory/ntap-20240712-0001/Refwww.blackhat.com/us-24/briefings/schedule/index.html#confusion-attacks-exploiting-hidden-semantic-ambiguity-in-apache-http-server-pre-recorded-40227CISAwww.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2024-38475

How CyberStrike helps

Frequently asked questions

What is CVE-2024-38475?

CVE-2024-38475 is a critical-severity vulnerability. It was published on July 1, 2024 and has a CVSS 3.1 base score of 9.1 (CRITICAL). This vulnerability is listed in CISA's Known Exploited Vulnerabilities catalog, indicating active exploitation in the wild.

How severe is CVE-2024-38475?

This vulnerability has a CVSS 3.1 base score of 9.1, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2024-38475?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2024-38475?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2024-38475 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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