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-mod-mailUpgrade nginxUpgrade nginx-filesystemUpgrade nginx-mod-http-geoipUpgrade nginx-all-modulesUpgrade nginx-mod-develUpgrade nginx-mod-http-perlUpgrade nginx-mod-http-image-filterUpgrade nginx-coreUpgrade nginx-debuginfoUpgrade nginx-mod-http-xslt-filterUpgrade nginx-mod-stream | Mar 27, 2025 | Feb 5, 2025 |
| Amazon_linux_2023 | — | Upgrade nginx-all-modulesUpgrade nginx-mod-http-xslt-filter-debuginfoUpgrade nginx-mod-mailUpgrade nginx-coreUpgrade nginx-mod-http-image-filterUpgrade nginx-mod-mail-debuginfoUpgrade nginx-filesystemUpgrade nginxUpgrade nginx-core-debuginfoUpgrade nginx-mod-stream-debuginfoUpgrade nginx-mod-http-perl-debuginfoUpgrade nginx-mod-http-image-filter-debuginfoUpgrade nginx-mod-http-xslt-filterUpgrade nginx-debugsourceUpgrade nginx-mod-http-perlUpgrade nginx-mod-streamUpgrade nginx-debuginfoUpgrade nginx-mod-devel | Feb 26, 2025 | Feb 5, 2025 |
| Debian | — | Upgrade nginx | Mar 17, 2025 | Feb 5, 2025 |
| Freebsd | — | Upgrade nginxUpgrade nginx-devel | Feb 6, 2025 | Feb 5, 2025 |
| Gentoo Linux | — | Upgrade www-servers/nginx. | Aug 17, 2026 | Aug 17, 2026 |
| 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-streamUpgrade nginx-mod-http-xslt-filterUpgrade nginx-mod-develUpgrade nginx-all-modulesUpgrade nginxUpgrade nginx-coreUpgrade nginx-filesystemUpgrade nginx-mod-http-image-filterUpgrade nginx-mod-http-perlUpgrade nginx-mod-mail | May 26, 2025 | Feb 5, 2025 |
| Redhat_linux | — | Upgrade nginx-coreUpgrade nginx-mod-http-perlUpgrade nginx-mod-mailUpgrade nginxUpgrade nginx-filesystemUpgrade nginx-mod-mail-debuginfoUpgrade nginx-all-modulesUpgrade nginx-mod-http-perl-debuginfoUpgrade nginx-mod-http-xslt-filter-debuginfoUpgrade nginx-core-debuginfoUpgrade nginx-mod-http-xslt-filterUpgrade nginx-debuginfoNo solution existsUpgrade nginx-mod-stream-debuginfoUpgrade nginx-mod-develUpgrade nginx-mod-http-image-filterUpgrade nginx-mod-streamUpgrade nginx-debugsourceUpgrade nginx-mod-http-image-filter-debuginfo | May 14, 2025 | Feb 5, 2025 |
| Suse | — | Upgrade nginx-sourceUpgrade nginx | Dec 5, 2025 | Jun 1, 2025 |
| Ubuntu | — | Upgrade nginx-devUpgrade nginx-docUpgrade nginxUpgrade nginx-lightUpgrade nginx-extrasUpgrade nginx-fullUpgrade libnginx-mod-rtmpUpgrade nginx-coreUpgrade nginx-common | 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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