CVE-2024-47252

Publication date 10 July 2025

Last updated 20 August 2025

Ubuntu priority

Cvss 3 Severity Score

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.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
apache2	25.10 questing	Fixed 2.4.64-1ubuntu2
	25.04 plucky	Fixed 2.4.63-1ubuntu1.1
	24.04 LTS noble	Fixed 2.4.58-1ubuntu8.7
	22.04 LTS jammy	Fixed 2.4.52-1ubuntu4.15
	20.04 LTS focal	Fixed 2.4.41-4ubuntu3.23+esm2
	18.04 LTS bionic	Fixed 2.4.29-1ubuntu4.27+esm6
	16.04 LTS xenial	Fixed 2.4.18-2ubuntu3.17+esm16
	14.04 LTS trusty	Needs evaluation

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Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package	Patch details
apache2	Upstream: c01e607

Severity score breakdown

Parameter	Value
Base score	7.5 · High
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality	High
Integrity impact	None
Availability impact	None
Vector	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N