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 | — | Upgrade nginx | Aug 8, 2025 | Feb 5, 2025 |
| Amazon Linux Ami 2 | — | Upgrade nginx-all-modulesUpgrade nginx-filesystemUpgrade nginxUpgrade nginx-mod-http-geoipUpgrade nginx-mod-mailUpgrade nginx-debuginfoUpgrade nginx-mod-streamUpgrade nginx-mod-develUpgrade nginx-mod-http-image-filterUpgrade nginx-mod-http-xslt-filterUpgrade nginx-coreUpgrade nginx-mod-http-perl | Mar 27, 2025 | Feb 5, 2025 |
| Amazon_linux_2023 | — | Upgrade nginx-mod-mail-debuginfoUpgrade nginx-mod-http-perl-debuginfoUpgrade nginx-mod-stream-debuginfoUpgrade nginx-mod-http-xslt-filter-debuginfoUpgrade nginx-core-debuginfoUpgrade nginx-mod-http-image-filterUpgrade nginx-all-modulesUpgrade nginx-filesystemUpgrade nginx-mod-http-image-filter-debuginfoUpgrade nginxUpgrade nginx-mod-mailUpgrade nginx-coreUpgrade nginx-debuginfoUpgrade nginx-mod-develUpgrade nginx-mod-http-perlUpgrade nginx-mod-http-xslt-filterUpgrade nginx-debugsourceUpgrade nginx-mod-stream | Feb 26, 2025 | Feb 5, 2025 |
| Debian | — | Upgrade nginx | Mar 17, 2025 | Feb 5, 2025 |
| Freebsd | — | Upgrade nginx-develUpgrade nginx | Feb 6, 2025 | Feb 5, 2025 |
| Nginx | — | Upgrade to nginx version 1.26.3Upgrade to nginx version 1.27.4 | Feb 6, 2025 | Feb 5, 2025 |
| Oracle_linux | — | Upgrade nginx-mod-http-xslt-filterUpgrade nginx-mod-streamUpgrade nginx-mod-develUpgrade nginx-mod-http-image-filterUpgrade nginx-all-modulesUpgrade nginx-filesystemUpgrade nginxUpgrade nginx-mod-mailUpgrade nginx-mod-http-perlUpgrade nginx-core | May 26, 2025 | Feb 5, 2025 |
| Redhat_linux | — | Upgrade nginx-mod-stream-debuginfoUpgrade nginx-mod-develUpgrade nginx-mod-streamUpgrade nginx-debuginfoNo solution existsUpgrade nginx-mod-http-image-filterUpgrade nginx-debugsourceUpgrade nginx-core-debuginfoUpgrade nginx-mod-http-xslt-filterUpgrade nginx-mod-http-image-filter-debuginfoUpgrade nginx-mod-mailUpgrade nginx-mod-mail-debuginfoUpgrade nginx-mod-http-xslt-filter-debuginfoUpgrade nginx-mod-http-perl-debuginfoUpgrade nginx-all-modulesUpgrade nginxUpgrade nginx-filesystemUpgrade nginx-mod-http-perlUpgrade nginx-core | May 14, 2025 | Feb 5, 2025 |
| Suse | — | Upgrade nginx-sourceUpgrade nginx | Dec 5, 2025 | Jun 1, 2025 |
| Ubuntu | — | Upgrade nginx-docUpgrade nginx-lightUpgrade nginx-extrasUpgrade nginx-devUpgrade nginxUpgrade nginx-commonUpgrade nginx-coreUpgrade nginx-fullUpgrade libnginx-mod-rtmp | Feb 25, 2025 | Feb 5, 2025 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Aug 20, 2025 | Feb 5, 2025 |
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