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CVE-2025-23419— TLS Session Resumption Vulnerability

Quick assessment

Affected
F5 NGINX Open Source
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

F5 Nginx是美国F5公司的一款轻量级Web服务器/反向代理服务器及电子邮件（IMAP/POP3）代理服务器，在BSD-like协议下发行。 F5 Nginx存在安全漏洞，该漏洞源于TLS会话票证或SSL会话缓存的使用，这可能使攻击者利用会话恢复来绕过这些服务器上的客户端证书认证要求。

CVSS 4.3 · Medium EPSS 2.79% · P86

Possible ATT&CK Techniques 1 AI

T1078 · Valid Accounts
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I. Basic Information for CVE-2025-23419

Vulnerability Information
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Vulnerability Title
TLS Session Resumption Vulnerability
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制不正确
Source: CVE Program / CVE List V5
Vulnerability Title
F5 Nginx 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
F5 Nginx是美国F5公司的一款轻量级Web服务器/反向代理服务器及电子邮件（IMAP/POP3）代理服务器，在BSD-like协议下发行。 F5 Nginx存在安全漏洞，该漏洞源于TLS会话票证或SSL会话缓存的使用，这可能使攻击者利用会话恢复来绕过这些服务器上的客户端证书认证要求。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
F5 NGINX Open Source 1.11.4 ~ * -
F5 NGINX Plus R17 ~ * -

II. Public POCs for CVE-2025-23419

# POC Description Source Link Shenlong Link
1 Script em python scanner safe-check da CVE-2025-23419 https://github.com/harley-ghostie/safe-check-CVE-2025-23419 POC Details
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III. Intelligence Information for CVE-2025-23419

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Vendor Advisories for CVE-2025-23419 (1)

Same Patch Batch · F5 · 2025-02-05 · 17 CVEs total

CVE-2025-20029 8.8 HIGH BIG-IP iControl REST and tmsh vulnerability
CVE-2025-23239 8.7 HIGH BIG-IP iControl REST vulnerability
CVE-2025-24320 8.0 HIGH BIG-IP Configuration utility vulnerability
CVE-2025-24497 7.5 HIGH BIG-IP PEM vulnerability
CVE-2025-24312 7.5 HIGH BIG-IP AFM vulnerability
CVE-2025-22846 7.5 HIGH BIG-IP SIP Vulnerability
CVE-2025-23412 7.5 HIGH BIG-IP APM access profile vulnerability
CVE-2025-24326 7.5 HIGH BIG-IP Advanced WAF/ASM BADoS vulnerability
CVE-2025-22891 7.5 HIGH BIG-IP PEM Vulnerability
CVE-2025-20045 7.5 HIGH BIG-IP SIP MRF Vulnerability
CVE-2025-20058 7.5 HIGH BIG-IP message routing vulnerability
CVE-2025-21091 7.5 HIGH BIG-IP SNMP vulnerability
CVE-2025-21087 7.5 HIGH TMM Vulnerability
CVE-2025-24319 6.5 MEDIUM BIG-IP Next Central Manager vulnerability
CVE-2025-23413 4.4 MEDIUM BIG-IP Next Central Manager vulnerability
CVE-2025-23415 3.1 LOW BIG-IP APM Endpoint Inspection vulnerability

IV. Related Vulnerabilities

Same product: NGINX Open Source
Same vendor: F5
Same weakness: CWE-863

V. Comments for CVE-2025-23419

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