CVE-2025-23419

MEDIUM

4.3

Description

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.

CVE Details

CVSS v3.1 Score4.3

SeverityMEDIUM

CVSS VectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredLOW

User InteractionNONE

Published2/5/2025

Last Modified1/27/2026

Sourcenvd

Honeypot Sightings0

Affected Products

debian:debian_linuxf5:nginxf5:nginx_plus

Weaknesses (CWE)

CWE-863CWE-863

References

https://my.f5.com/manage/s/article/K000149173(f5sirt@f5.com)

http://www.openwall.com/lists/oss-security/2025/02/05/8(af854a3a-2127-422b-91ae-364da2661108)

https://lists.debian.org/debian-lts-announce/2025/03/msg00017.html(af854a3a-2127-422b-91ae-364da2661108)

IOC Correlations

No correlations recorded

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