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vulnerability

Apache HTTPD: CVE-2024-47252: Improper Neutralization of Escape, Meta, or Control Sequences

Severity
8
CVSS
(AV:N/AC:L/Au:N/C:C/I:N/A:N)
Published
Jul 10, 2025
Added
Jul 18, 2025
Modified
Mar 25, 2026

Description

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.

Solution

apache-httpd-upgrade-latest
Title
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