Description
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.
Problem types
Product status
R35
R34 before R34 P2
R33 before R33 P3
R32 before R32 P3
R31 before *
R30 before *
0.7 before 1.29.1
Credits
F5 acknowledges the Amazon Web Services Security team for bringing this issue to our attention and following the highest standards of coordinated disclosure.
References
my.f5.com/manage/s/article/K000152786
