Summary
Package updates are available for Amazon Linux 2023 that fix the following vulnerabilities: CVE-2025-23419: 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.
Fixed packages 18
| Release | Package | Fixed in |
|---|---|---|
| Amazon Linux · 2023 | nginx | 1:1.26.3-1.amzn2023.0.1 |
| Amazon Linux · 2023 | nginx-all-modules | 1:1.26.3-1.amzn2023.0.1 |
| Amazon Linux · 2023 | nginx-core | 1:1.26.3-1.amzn2023.0.1 |
| Amazon Linux · 2023 | nginx-core-debuginfo | 1:1.26.3-1.amzn2023.0.1 |
| Amazon Linux · 2023 | nginx-debuginfo | 1:1.26.3-1.amzn2023.0.1 |
| Amazon Linux · 2023 | nginx-debugsource | 1:1.26.3-1.amzn2023.0.1 |
| Amazon Linux · 2023 | nginx-filesystem | 1:1.26.3-1.amzn2023.0.1 |
| Amazon Linux · 2023 | nginx-mod-devel | 1:1.26.3-1.amzn2023.0.1 |
| Amazon Linux · 2023 | nginx-mod-http-image-filter | 1:1.26.3-1.amzn2023.0.1 |
| Amazon Linux · 2023 | nginx-mod-http-image-filter-debuginfo | 1:1.26.3-1.amzn2023.0.1 |
| Amazon Linux · 2023 | nginx-mod-http-perl | 1:1.26.3-1.amzn2023.0.1 |
| Amazon Linux · 2023 | nginx-mod-http-perl-debuginfo | 1:1.26.3-1.amzn2023.0.1 |
| Amazon Linux · 2023 | nginx-mod-http-xslt-filter | 1:1.26.3-1.amzn2023.0.1 |
| Amazon Linux · 2023 | nginx-mod-http-xslt-filter-debuginfo | 1:1.26.3-1.amzn2023.0.1 |
| Amazon Linux · 2023 | nginx-mod-mail | 1:1.26.3-1.amzn2023.0.1 |
| Amazon Linux · 2023 | nginx-mod-mail-debuginfo | 1:1.26.3-1.amzn2023.0.1 |
| Amazon Linux · 2023 | nginx-mod-stream | 1:1.26.3-1.amzn2023.0.1 |
| Amazon Linux · 2023 | nginx-mod-stream-debuginfo | 1:1.26.3-1.amzn2023.0.1 |
Vulnerabilities 1
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Medium 4.3CVE-2025-23419 Public exploit
TLS Session Resumption Vulnerability
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://ngin…
References
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web
https://alas.aws.amazon.com/cve/html/CVE-2025-23419.html