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.
CVSS Details
- CVSS 4.0 Base Score: 5.3 (MEDIUM)
- CVSS 4.0 Vector: (CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X)
- CVSS 3.1 Base Score: 4.3
- CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alpine Linux | alpine-linux-upgrade-nginx | Aug 8, 2025 | Feb 5, 2025 | |
| Amazon Linux Ami 2 | amazon-linux-ami-2-upgrade-nginxamazon-linux-ami-2-upgrade-nginx-all-modulesamazon-linux-ami-2-upgrade-nginx-coreamazon-linux-ami-2-upgrade-nginx-debuginfoamazon-linux-ami-2-upgrade-nginx-filesystemamazon-linux-ami-2-upgrade-nginx-mod-develamazon-linux-ami-2-upgrade-nginx-mod-http-geoipamazon-linux-ami-2-upgrade-nginx-mod-http-image-filteramazon-linux-ami-2-upgrade-nginx-mod-http-perlamazon-linux-ami-2-upgrade-nginx-mod-http-xslt-filteramazon-linux-ami-2-upgrade-nginx-mod-mailamazon-linux-ami-2-upgrade-nginx-mod-stream | Mar 27, 2025 | Feb 5, 2025 | |
| Amazon_linux_2023 | amazon-linux-2023-upgrade-nginxamazon-linux-2023-upgrade-nginx-all-modulesamazon-linux-2023-upgrade-nginx-coreamazon-linux-2023-upgrade-nginx-core-debuginfoamazon-linux-2023-upgrade-nginx-debuginfoamazon-linux-2023-upgrade-nginx-debugsourceamazon-linux-2023-upgrade-nginx-filesystemamazon-linux-2023-upgrade-nginx-mod-develamazon-linux-2023-upgrade-nginx-mod-http-image-filteramazon-linux-2023-upgrade-nginx-mod-http-image-filter-debuginfoamazon-linux-2023-upgrade-nginx-mod-http-perlamazon-linux-2023-upgrade-nginx-mod-http-perl-debuginfoamazon-linux-2023-upgrade-nginx-mod-http-xslt-filteramazon-linux-2023-upgrade-nginx-mod-http-xslt-filter-debuginfoamazon-linux-2023-upgrade-nginx-mod-mailamazon-linux-2023-upgrade-nginx-mod-mail-debuginfoamazon-linux-2023-upgrade-nginx-mod-streamamazon-linux-2023-upgrade-nginx-mod-stream-debuginfo | Feb 26, 2025 | Feb 5, 2025 | |
| Debian | debian-upgrade-nginx | Mar 17, 2025 | Feb 5, 2025 | |
| Freebsd | freebsd-upgrade-package-nginx-develfreebsd-upgrade-package-nginx | Feb 6, 2025 | Feb 5, 2025 | |
| Nginx | nginx-nginx-upgrade-1_26_3nginx-nginx-upgrade-1_27_4 | Feb 6, 2025 | Feb 6, 2025 | |
| Oracle_linux | — | oracle-linux-upgrade-nginxoracle-linux-upgrade-nginx-all-modulesoracle-linux-upgrade-nginx-coreoracle-linux-upgrade-nginx-filesystemoracle-linux-upgrade-nginx-mod-develoracle-linux-upgrade-nginx-mod-http-image-filteroracle-linux-upgrade-nginx-mod-http-perloracle-linux-upgrade-nginx-mod-http-xslt-filteroracle-linux-upgrade-nginx-mod-mailoracle-linux-upgrade-nginx-mod-stream | May 26, 2025 | Feb 5, 2025 |
| Redhat_linux | redhat-upgrade-nginxredhat-upgrade-nginx-all-modulesredhat-upgrade-nginx-coreredhat-upgrade-nginx-core-debuginforedhat-upgrade-nginx-debuginforedhat-upgrade-nginx-debugsourceredhat-upgrade-nginx-filesystemredhat-upgrade-nginx-mod-develredhat-upgrade-nginx-mod-http-image-filterredhat-upgrade-nginx-mod-http-image-filter-debuginforedhat-upgrade-nginx-mod-http-perlredhat-upgrade-nginx-mod-http-perl-debuginforedhat-upgrade-nginx-mod-http-xslt-filterredhat-upgrade-nginx-mod-http-xslt-filter-debuginforedhat-upgrade-nginx-mod-mailredhat-upgrade-nginx-mod-mail-debuginforedhat-upgrade-nginx-mod-streamredhat-upgrade-nginx-mod-stream-debuginfo | May 14, 2025 | Feb 5, 2025 | |
| Suse | — | suse-upgrade-nginxsuse-upgrade-nginx-source | Dec 5, 2025 | Jun 1, 2025 |
| Ubuntu | ubuntu-upgrade-libnginx-mod-rtmpubuntu-upgrade-nginxubuntu-upgrade-nginx-commonubuntu-upgrade-nginx-coreubuntu-upgrade-nginx-devubuntu-upgrade-nginx-docubuntu-upgrade-nginx-extrasubuntu-upgrade-nginx-fullubuntu-upgrade-nginx-light | Feb 25, 2025 | Feb 5, 2025 | |
| Vmware Photon_os | vmware-photon_os_update_tdnf | Aug 20, 2025 | Feb 5, 2025 |
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