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OpenAdvisories
Low ALAS2023-2025-1152 1 CVE

Low: nginx security update (Amazon Linux 2023)

Published Aug 13, 2025 · Updated Aug 25, 2025

Summary

Package updates are available for Amazon Linux 2023 that fix the following vulnerabilities: CVE-2025-53859: NGINX Open Source and NGINX Plus have a vulnerability in the ngx_mail_smtp_module that might allow an unauthenticated attacker to over-read NGINX SMTP authentication process memory; as a result, the server side may leak arbitrary bytes sent in a request to the authentication server. This issue happens during the NGINX SMTP authentication process and requires the attacker to make preparations against the target system to extract the leaked data. The issue affects NGINX only if (1) it is built with the ngx_mail_smtp_module, (2) the smtp_auth directive is configured with method "none," and (3) the authentication server returns the "Auth-Wait" response header. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

Fixed packages 18

ReleasePackageFixed in
Amazon Linux · 2023 nginx 1:1.28.0-1.amzn2023.0.2
Amazon Linux · 2023 nginx-all-modules 1:1.28.0-1.amzn2023.0.2
Amazon Linux · 2023 nginx-core 1:1.28.0-1.amzn2023.0.2
Amazon Linux · 2023 nginx-core-debuginfo 1:1.28.0-1.amzn2023.0.2
Amazon Linux · 2023 nginx-debuginfo 1:1.28.0-1.amzn2023.0.2
Amazon Linux · 2023 nginx-debugsource 1:1.28.0-1.amzn2023.0.2
Amazon Linux · 2023 nginx-filesystem 1:1.28.0-1.amzn2023.0.2
Amazon Linux · 2023 nginx-mod-devel 1:1.28.0-1.amzn2023.0.2
Amazon Linux · 2023 nginx-mod-http-image-filter 1:1.28.0-1.amzn2023.0.2
Amazon Linux · 2023 nginx-mod-http-image-filter-debuginfo 1:1.28.0-1.amzn2023.0.2
Amazon Linux · 2023 nginx-mod-http-perl 1:1.28.0-1.amzn2023.0.2
Amazon Linux · 2023 nginx-mod-http-perl-debuginfo 1:1.28.0-1.amzn2023.0.2
Amazon Linux · 2023 nginx-mod-http-xslt-filter 1:1.28.0-1.amzn2023.0.2
Amazon Linux · 2023 nginx-mod-http-xslt-filter-debuginfo 1:1.28.0-1.amzn2023.0.2
Amazon Linux · 2023 nginx-mod-mail 1:1.28.0-1.amzn2023.0.2
Amazon Linux · 2023 nginx-mod-mail-debuginfo 1:1.28.0-1.amzn2023.0.2
Amazon Linux · 2023 nginx-mod-stream 1:1.28.0-1.amzn2023.0.2
Amazon Linux · 2023 nginx-mod-stream-debuginfo 1:1.28.0-1.amzn2023.0.2

Vulnerabilities 1

References

  • web
    https://alas.aws.amazon.com/cve/html/CVE-2025-53859.html