CVE-2024-47252

HIGH7.5

Apache HTTP Server: mod_ssl error log variable escaping

Published Jul 10, 2025

Modified 2 months ago

No fix available

Details

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.

References

WEBhttp://www.openwall.com/lists/oss-security/2025/07/10/2 WEBhttp://www.openwall.com/lists/oss-security/2025/07/10/6 ADVISORYhttps://httpd.apache.org/security/vulnerabilities_24.html WEBhttps://lists.debian.org/debian-lts-announce/2025/08/msg00009.html ADVISORYhttps://www.cve.org/CVERecord?id=CVE-2024-47252

CVSS Analysis

CVSS v3.1

7.5

Exploitability

Attack Vector

NetworkAV:N

Attack Complexity

LowAC:L

Privileges Required

NonePR:N

User Interaction

NoneUI:N

Scope

UnchangedS:U

Impact

Confidentiality

HighC:H

Integrity

NoneI:N

Availability

NoneA:N

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

Weakness Type (CWE)

Other

CWE-150

Ecosystems

Timeline

PublishedJul 10, 2025

ModifiedNov 4, 2025