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CVE-2024-47252

Apache HTTP Server: mod_ssl error log variable escaping

Published: Jul 10, 2025Updated: Nov 4, 2025 Sources: CVE List NVD BDUCWE-150
NVD MITRE
7.5CVSSHIGH
EPSS Score
0.7%
Top 53.0%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

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.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:HI:NA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:NIntegrity
None
A:NAvailability
None
Open in CVSS calculator →

Weaknesses

CWE-150

Affected Products

http serverapache
On-premWeb App
Networking Infrastructure / load-balancer-proxy
Apache HTTP ServerApache Software Foundation
On-premWeb App
Networking Infrastructure / load-balancer-proxy
Red Hat Enterprise LinuxRed Hat Inc.
On-premOS
Operating Systems / linux-distro
Suse Linux Enterprise DesktopNovell Inc.
On-premOS
Operating Systems / linux-distro
Suse Linux Enterprise ServerNovell Inc.
On-premOS
Operating Systems / linux-distro
apacheoss-projectUSWeb & CMS Pluginsaka apache http server, apache httpd
apache software foundationoss-projectUSWeb & CMS Pluginsaka apache foundation
red hat inc.commercialUSOperating Systemsaka red hat
novell inc.commercialUSOperating Systems
and 14 more affected products View all →

Exploitability

Official Patch Available

References

https://httpd.apache.org/security/vulnerabilities_24.html
httpd.apache.org
http://www.openwall.com/lists/oss-security/2025/07/10/2
openwall.com
http://www.openwall.com/lists/oss-security/2025/07/10/6
openwall.com
and 16 more references View all →

Timeline

Published
Jul 10, 2025
Last Updated
Nov 4, 2025

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