CVEvulnerability

CVE-2024-38475

9.1 CRITICAL Known exploited Published 2024-07-01 Modified 2026-06-17 Official page ↗

CISA Known Exploited Vulnerability

Apache HTTP Server Improper Escaping of Output Vulnerability — Apache HTTP Server

Apache HTTP Server contains an improper escaping of output vulnerability in mod_rewrite that 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.

Added to KEV: 2025-05-01
Remediation due: 2025-05-22
Ransomware use: Unknown
Required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Notes: This vulnerability affects a common open-source component, third-party library, or a protocol used by different products. Please check with specific vendors for information on patching status. For more information, please see: https://httpd.apache.org/security/vulnerabilities_24.html ; https://nvd.nist.gov/vuln/detail/CVE-2024-38475

Status: Analyzed
Published: 2024-07-01
Last modified: 2026-06-17
Assigner: [email protected]
CVSS 3.1 ([email protected]): 9.1 CRITICAL — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
CVSS 3.1 (134c704f-9b21-4f2e-91b3-4a467353bcc0): 9.1 CRITICAL — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Weaknesses: CWE-116

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.

Affected configurations

• apache http server (>= 2.4.0 < 2.4.60) • netapp ontap 9 • sonicwall sma 200 firmware (< 10.2.1.14-75sv) • sonicwall sma 210 firmware (< 10.2.1.14-75sv) • sonicwall sma 400 firmware (< 10.2.1.14-75sv) • sonicwall sma 410 firmware (< 10.2.1.14-75sv) • sonicwall sma 500v firmware (< 10.2.1.14-75sv)

Weakness · CWE (1)

CWE-116 Improper Encoding or Escaping of Output weakness

References