CVE-2024-47252

Insufficient escaping of user-supplied data in mod_ssl in Apache HTTP Server 2.4.63 and earlier allows an untrusted SSL/TLS client to insert escape characters into log files in some configurations. In a logging configuration where CustomLog is used with "%{varname}x" or "%{varname}c" to log variables provided by mod_ssl such as SSL_TLS_SNI, no escaping is performed by either mod_log_config or mod_ssl and unsanitized data provided by the client may appear in log files.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://httpd.apache.org/security/vulnerabilities_24.html	Vendor Advisory
http://www.openwall.com/lists/oss-security/2025/07/10/2
http://www.openwall.com/lists/oss-security/2025/07/10/6
https://lists.debian.org/debian-lts-announce/2025/08/msg00009.html

Configurations

Configuration 1 (hide)

cpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:*

History

04 Nov 2025, 22:16

Type	Values Removed	Values Added
References		() http://www.openwall.com/lists/oss-security/2025/07/10/2 - () http://www.openwall.com/lists/oss-security/2025/07/10/6 -

03 Nov 2025, 20:16

Type	Values Removed	Values Added
References		() https://lists.debian.org/debian-lts-announce/2025/08/msg00009.html -

29 Jul 2025, 15:15

Type	Values Removed	Values Added
First Time		Apache Apache http Server
CPE		cpe:2.3:a:apache:http_server::::::::
References	~~() https://httpd.apache.org/security/vulnerabilities_24.html -~~	() https://httpd.apache.org/security/vulnerabilities_24.html - Vendor Advisory

15 Jul 2025, 20:15

Type	Values Removed	Values Added
New CVE

Information

Published : 2025-07-10 17:15

Updated : 2025-11-04 22:16

NVD link : CVE-2024-47252

Mitre link : CVE-2024-47252

CVE.ORG link : CVE-2024-47252

JSON object : View

Products Affected

apache

http_server

CWE

CWE-150

Improper Neutralization of Escape, Meta, or Control Sequences

{"id": "CVE-2024-47252", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 3.6, "exploitabilityScore": 3.9}]}, "published": "2025-07-10T17:15:46.400", "references": [{"url": "https://httpd.apache.org/security/vulnerabilities_24.html", "tags": ["Vendor Advisory"], "source": "security@apache.org"}, {"url": "http://www.openwall.com/lists/oss-security/2025/07/10/2", "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "http://www.openwall.com/lists/oss-security/2025/07/10/6", "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://lists.debian.org/debian-lts-announce/2025/08/msg00009.html", "source": "af854a3a-2127-422b-91ae-364da2661108"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Secondary", "source": "security@apache.org", "description": [{"lang": "en", "value": "CWE-150"}]}], "descriptions": [{"lang": "en", "value": "Insufficient escaping of user-supplied data in mod_ssl in Apache HTTP Server 2.4.63 and earlier allows an untrusted SSL/TLS client to insert escape characters into log files in some configurations.\n\nIn a logging configuration where CustomLog is used with \"%{varname}x\" or \"%{varname}c\" to log variables provided by mod_ssl such as SSL_TLS_SNI, no escaping is performed by either mod_log_config or mod_ssl and unsanitized data provided by the client may appear in log files."}, {"lang": "es", "value": "Un escape insuficiente de los datos proporcionados por el usuario en mod_ssl en Apache HTTP Server 2.4.63 y versiones anteriores permite que un cliente SSL/TLS no confiable inserte caracteres de escape en los archivos de registro en algunas configuraciones. En una configuraci\u00f3n de registro donde se usa CustomLog con \"%{varname}x\" o \"%{varname}c\" para registrar variables proporcionadas por mod_ssl, como SSL_TLS_SNI, ni mod_log_config ni mod_ssl realizan ning\u00fan escape, y los datos no saneados proporcionados por el cliente pueden aparecer en los archivos de registro."}], "lastModified": "2025-11-04T22:16:04.060", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "C552FA45-1E0F-4F3A-BB99-8E4604C82820", "versionEndExcluding": "2.4.64", "versionStartIncluding": "2.4.0"}], "operator": "OR"}]}], "sourceIdentifier": "security@apache.org"}