Insufficient Escaping in Apache HTTP Server by Apache
CVE-2024-47252

7.5HIGH

Key Information:

Vendor

Apache
Status
Apache Http Server
Vendor
CVE Published:
10 July 2025

What is CVE-2024-47252?

An issue exists in the Apache HTTP Server's mod_ssl component that allows untrusted SSL/TLS clients to manipulate log files due to insufficient escaping of user-supplied data. In configurations using CustomLog with specific variable formats to log data provided by mod_ssl—such as SSL_TLS_SNI—unsanitized client data can lead to the injection of escape characters into log files. This lack of proper data handling can pose significant security risks, especially in environments where log integrity is crucial.

Affected Version(s)

Apache HTTP Server 2.4 <= 2.4.63

References

https://httpd.apache.org/security/vulnerabilities_24.html
vendor-advisory

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
High
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

John Runyon
.
CVE-2024-47252 : Insufficient Escaping in Apache HTTP Server by Apache