When the ngx_mail_auth_http_module module is enabled on NGINX Plus or NGINX Open Source, undisclosed requests can cause worker processes to terminate. This issue may occur when (1) CRAM-MD5 or APOP authentication is enabled, and (2) the authentication server permits retry by returning the Auth-Wait response header. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
1.18.0-6ubuntu14.101.24.0-2ubuntu7.71.28.0-6ubuntu1.21.4.6-1ubuntu3.9+esm61.10.3-0ubuntu0.16.04.5+esm71.14.0-0ubuntu1.11+esm21.18.0-0ubuntu1.7+esm1Exploitability
AV:NAC:LAT:NPR:NUI:NVulnerable System
VC:NVI:NVA:HSubsequent System
SC:NSI:NSA:NCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N