Cyborg via Exim-users <[email protected]> (Fr 06 Sep 2019 14:37:23 CEST): > Hi, > > this post is only relevant for European Corps or Organisations WITH > mailerservers > in or outside of the EU. if you are not based in the EU, you can skip this. > > As a possible Mitigation for CVE-2019-15846 stopping to use TLS in form of > > tls_advertise_hosts = > > in your config, is a bigger deal, as you may think.
For that reason I've published another mitigation method
# to be prepended to your mail acl (the ACL referenced
# by the acl_smtp_mail main config option)
deny condition = ${if eq{\\}{${substr{-1}{1}{$tls_in_sni}}}}
deny condition = ${if eq{\\}{${substr{-1}{1}{$tls_in_peerdn}}}}
Best regards from Dresden/Germany
Viele Grüße aus Dresden
Heiko Schlittermann
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SCHLITTERMANN.de ---------------------------- internet & unix support -
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gnupg encrypted messages are welcome --------------- key ID: F69376CE -
! key id 7CBF764A and 972EAC9F are revoked since 2015-01 ------------ -
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