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.
CISA Known Exploited Vulnerability
Date added 2025-05-01 | Due date 2025-05-22
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Problem types
CWE-116 Improper Encoding or Escaping of Output
Product status
2.4.0
Timeline
| 2024-04-01: | reported |
Credits
Orange Tsai (@orange_8361) from DEVCORE
References
httpd.apache.org/security/vulnerabilities_24.html
security.netapp.com/advisory/ntap-20240712-0001/
