CVE-2024-38475

CRITICALCISA KEV

9.1

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.

CVE Details

CVSS v3.1 Score9.1

SeverityCRITICAL

CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredNONE

User InteractionNONE

Published7/1/2024

Last Modified11/17/2025

Sourcekev

Honeypot Sightings0

CISA KEV

VendorApache

ProductHTTP Server

Vulnerability NameApache HTTP Server Improper Escaping of Output Vulnerability

KEV Date Added2025-05-01

Remediation Due Date2025-05-22

Ransomware UseUnknown

Affected Products

apache:http_servernetapp:ontap_9sonicwall:sma_200sonicwall:sma_200_firmwaresonicwall:sma_210sonicwall:sma_210_firmwaresonicwall:sma_400sonicwall:sma_400_firmwaresonicwall:sma_410sonicwall:sma_410_firmwaresonicwall:sma_500vsonicwall:sma_500v_firmware

Weaknesses (CWE)

CWE-116

References

https://httpd.apache.org/security/vulnerabilities_24.html(security@apache.org)

https://security.netapp.com/advisory/ntap-20240712-0001/(security@apache.org)

http://www.openwall.com/lists/oss-security/2024/07/01/8(af854a3a-2127-422b-91ae-364da2661108)

https://github.com/apache/httpd/commit/9a6157d1e2f7ab15963020381054b48782bc18cf(af854a3a-2127-422b-91ae-364da2661108)

https://httpd.apache.org/security/vulnerabilities_24.html(af854a3a-2127-422b-91ae-364da2661108)

https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2024-0018(af854a3a-2127-422b-91ae-364da2661108)

https://security.netapp.com/advisory/ntap-20240712-0001/(af854a3a-2127-422b-91ae-364da2661108)

https://www.blackhat.com/us-24/briefings/schedule/index.html#confusion-attacks-exploiting-hidden-semantic-ambiguity-in-apache-http-server-pre-recorded-40227(af854a3a-2127-422b-91ae-364da2661108)

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2024-38475(134c704f-9b21-4f2e-91b3-4a467353bcc0)

IOC Correlations

No correlations recorded

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