In Dovecot before 2.3.11.3, sending a specially formatted RPA request will crash the auth service because a length of zero is mishandled.Referenceshttps://dovecot.org/securityhttps://www.openwall.com/lists/oss-security/2020/08/12/3https://www.debian.org/security/2020/dsa-4745https://lists.debian.org/debian-lts-announce/2020/08/msg00024.htmlhttps://usn.ubuntu.com/4456-1/https://usn.ubuntu.com/4456-2/http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00048.htmlhttp://lists.opensuse.org/opensuse-security-announce/2020-08/msg00059.htmlhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4AAX2MJEULPVSRZOBX3PNPFSYP4FM4TT/https://security.gentoo.org/glsa/202009-02https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XKKAL3OMG76ZZ7CIEMQP2K6KCTD2RAKE/https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EYZU6CHA3VMYYAUCMHSCCQKJEVEIKPQ2/
