Tracker / CVE-2025-23419
CVE-2025-23419
Medium 4.3
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.
Affected products and versions
| debian | debian_linux |
|---|---|
| f5 | nginx · 1.11.4 → 1.26.3 |
| f5 | nginx · 1.27.0 → 1.27.4 |
| f5 | nginx_plus |
| f5 | nginx_plus · r28 → r32 |
Analysis
This page is not indexable yet.Until it carries original analysis — what it actually exposes, how to check in two minutes whether a system was touched, what to do if it was — the page stays noindex. The database decides that, not the template.