ArchLinux: 201905-6: dovecot: denial of service
Summary
- CVE-2019-11494 (denial of service)
Submission-login crashes with signal 11 due to null pointer access when
authentication is aborted by disconnecting. This can lead to denial-of
service attack by persistent attacker(s).
- CVE-2019-11499 (denial of service)
Submission-login crashes when authentication is started over TLS
secured channel and invalid authentication message is sent. This can
lead to denial-of-service attack by persistent attacker(s).
Resolution
Upgrade to 2.3.6-1.
# pacman -Syu "dovecot>=2.3.6-1"
The problems have been fixed upstream in version 2.3.6.
References
https://dovecot.org/doc/NEWS-2.3 https://www.mail-archive.com/fulldisclosure@seclists.org/msg06126.html https://dovecot.org/pipermail/dovecot/2019-April/115757.html https://dovecot.org/pipermail/dovecot/2019-April/115758.html https://security.archlinux.org/CVE-2019-11494 https://security.archlinux.org/CVE-2019-11499
Workaround
None.