CVE-2024-38475
Summary
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.
Impact & exploitability
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Affected products we track (1)
Recommendation
This vulnerability is being actively exploited in the wild — patch affected products urgently. Open any affected product above for its exact safe version.
Official patch: https://github.com/apache/httpd/commit/9a6157d1e2f7ab15963020381054b48782bc18cf ↗
Additional information
- NVD record
- https://github.com/apache/httpd/commit/9a6157d1e2f7ab15963020381054b48782bc18cfPatch
- https://httpd.apache.org/security/vulnerabilities_24.htmlAdvisory
- https://httpd.apache.org/security/vulnerabilities_24.htmlAdvisory
- https://security.netapp.com/advisory/ntap-20240712-0001/Advisory
- http://www.openwall.com/lists/oss-security/2024/07/01/8Advisory
- https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2024-0018Advisory
- https://security.netapp.com/advisory/ntap-20240712-0001/Advisory
- https://www.blackhat.com/us-24/briefings/schedule/index.html#confusion-attacks-exploiting-hidden-semantic-ambiguity-in-apache-http-server-pre-recorded-40227Advisory