An Update to the mitigation for the current CVE:
Add - as part of the mail ACL (the ACL referenced by the main config
option "acl_smtp_mail"):
deny condition = ${if eq{\\}{${substr{-1}{1}{$tls_in_sni}}}}
deny condition = ${if eq{\\}{${substr{-1}{1}{$tls_in_peerdn}}}}
This should prevent the currently known attack vector.
Best regards from Dresden/Germany
Viele Grüße aus Dresden
Heiko Schlittermann
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SCHLITTERMANN.de ---------------------------- internet & unix support -
Heiko Schlittermann, Dipl.-Ing. (TU) - {fon,fax}: +49.351.802998{1,3} -
gnupg encrypted messages are welcome --------------- key ID: F69376CE -
! key id 7CBF764A and 972EAC9F are revoked since 2015-01 ------------ -
