Vulnerability Monitor

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CVE-2025-23419

When multiple server blocks are configured to share the same IP address and port, an attacker can use session resumption to bypass client certificate authentication requirements on these servers. This vulnerability arises when TLS Session Tickets https://nginx.org/en/docs/http/ngx_http_ssl_module.html#ssl_session_ticket_key are used and/or the SSL session cache https://nginx.org/en/docs/http/ngx_http_ssl_module.html#ssl_session_cache are used in the default server and the default server is performing client certificate authentication.   Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

Published

2025-02-05T18:15:33.347

Last Modified

2025-11-12T14:50:08.157

Status

Analyzed

Source

[email protected]

Severity

CVSSv3.1: 4.3 (MEDIUM)

Weaknesses
  • Type: Secondary
    CWE-287
  • Type: Primary
    CWE-613
Affected Vendors & Products
Type Vendor Product Version/Range Vulnerable?
Application f5 nginx < 1.26.3 Yes
Application f5 nginx < 1.27.4 Yes
Application f5 nginx_plus < r32 Yes
Application f5 nginx_plus r32 Yes
Application f5 nginx_plus r32 Yes
Application f5 nginx_plus r33 Yes
Application f5 nginx_plus r33 Yes
Operating System debian debian_linux 11.0 Yes
References