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.
References
| Link | Resource |
|---|---|
| https://my.f5.com/manage/s/article/K000149173 | Vendor Advisory |
| http://www.openwall.com/lists/oss-security/2025/02/05/8 | Mailing List Third Party Advisory |
| https://lists.debian.org/debian-lts-announce/2025/03/msg00017.html | Issue Tracking Third Party Advisory |
Configurations
Configuration 1 (hide)
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Configuration 2 (hide)
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History
12 Nov 2025, 14:50
| Type | Values Removed | Values Added |
|---|---|---|
| First Time |
Debian debian Linux
F5 F5 nginx Plus F5 nginx Debian |
|
| CWE | CWE-613 | |
| References | () https://my.f5.com/manage/s/article/K000149173 - Vendor Advisory | |
| References | () http://www.openwall.com/lists/oss-security/2025/02/05/8 - Mailing List, Third Party Advisory | |
| References | () https://lists.debian.org/debian-lts-announce/2025/03/msg00017.html - Issue Tracking, Third Party Advisory | |
| CPE | cpe:2.3:a:f5:nginx_plus:r33:-:*:*:*:*:*:* cpe:2.3:a:f5:nginx_plus:*:*:*:*:*:*:*:* cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:* cpe:2.3:a:f5:nginx_plus:r32:p1:*:*:*:*:*:* cpe:2.3:a:f5:nginx_plus:r32:-:*:*:*:*:*:* cpe:2.3:a:f5:nginx:*:*:*:*:*:*:*:* cpe:2.3:a:f5:nginx_plus:r33:p1:*:*:*:*:*:* |
03 Nov 2025, 21:19
| Type | Values Removed | Values Added |
|---|---|---|
| References |
|
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| Summary |
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05 Feb 2025, 20:15
| Type | Values Removed | Values Added |
|---|---|---|
| References |
|
05 Feb 2025, 18:15
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2025-02-05 18:15
Updated : 2025-11-12 14:50
NVD link : CVE-2025-23419
Mitre link : CVE-2025-23419
CVE.ORG link : CVE-2025-23419
JSON object : View
Products Affected
f5
- nginx
- nginx_plus
debian
- debian_linux
