Updated: 2025-08-20 03:18:38.254599
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.
| Links | NIST | CIRCL | RHEL | Ubuntu |
| Severity | Score | |
|---|---|---|
| CVSS Version 2.x | NONE | 0.0 |
| CVSS Version 3.x | HIGH | 7.5 |
| OS name | Project name | Version | Score | Severity | Status | Errata | Last updated | Statement |
|---|---|---|---|---|---|---|---|---|
| Ubuntu 16.04 ELS | apache2 | 2.4.18 | 7.5 | HIGH | Released | CLSA-2025:1757014860 | 2025-09-04 21:31:58 | |
| Ubuntu 18.04 ELS | apache2 | 2.4.29 | 7.5 | HIGH | Released | CLSA-2025:1756830276 | 2025-09-02 22:39:22 |