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.
2025-07-10T17:15:46.400
2025-07-29T15:15:35.107
Analyzed
CVSSv3.1: 7.5 (HIGH)
Type | Vendor | Product | Version/Range | Vulnerable? |
---|---|---|---|---|
Application | apache | http_server | < 2.4.64 | Yes |