Fedora 33: FEDORA-2020-b8ebc4201e Critical: Dovecot Memory Crashes

Dovecot is an IMAP server for Linux/UNIX-like systems, written with security

primarily in mind. It also contains a small POP3 server. It supports mail

in either of maildir or mbox formats.

The SQL drivers and authentication plug-ins are in their subpackages.

CVE-2020-12100: Parsing mails with a large number of MIME parts could

have resulted in excessive CPU usage or a crash due to running out of

stack memory. CVE-2020-12673: Dovecot's NTLM implementation does not

correctly check message buffer size, which leads to reading past

allocation which can lead to crash. CVE-2020-10967: lmtp/submission:

Issuing the RCPT command with an address that has the empty quoted string

as local-part causes the lmtp service to crash. CVE-2020-12674:

Dovecot's RPA mechanism implementation accepts zero-length message, which

leads to assert-crash later on.

* Wed Sep 2 2020 Michal Hlavinka - 1:2.3.11.3-5

- fix gssapi issue

* Wed Aug 26 2020 Michal Hlavinka - 1:2.3.11.3-4

- fix FTBFS on 32bit systems

* Mon Aug 17 2020 Jeff Law - 1:2.3.11.3-2

- Disable LTO

* Sat Aug 15 2020 Michal Hlavinka - 1:2.3.11.3-1

- CVE-2020-12100: Parsing mails with a large number of MIME parts could

have resulted in excessive CPU usage or a crash due to running out of

stack memory.

- CVE-2020-12673: Dovecot's NTLM implementation does not correctly check

message buffer size, which leads to reading past allocation which can

lead to crash.

- CVE-2020-10967: lmtp/submission: Issuing the RCPT command with an

address that has the empty quoted string as local-part causes the lmtp

service to crash.

- CVE-2020-12674: Dovecot's RPA mechanism implementation accepts

zero-length message, which leads to assert-crash later on.

* Sat Aug 1 2020 Fedora Release Engineering - 1:2.3.10.1-3

- Second attempt - Rebuilt for

https://fedoraproject.org/wiki/Fedora_33_Mass_Rebuild

* Mon Jul 27 2020 Fedora Release Engineering - 1:2.3.10.1-2

- Rebuilt for https://fedoraproject.org/wiki/Fedora_33_Mass_Rebuild

[ 1 ] Bug #1868539 - CVE-2020-12100 dovecot: Resource exhaustion via deeply nested MIME parts [fedora-all]

https://bugzilla.redhat.com/show_bug.cgi?id=1868539

[ 2 ] Bug #1868540 - CVE-2020-12673 dovecot: Out of bound reads in dovecot NTLM implementation [fedora-all]

https://bugzilla.redhat.com/show_bug.cgi?id=1868540

[ 3 ] Bug #1868541 - CVE-2020-12674 dovecot: Crash due to assert in RPA implementation [fedora-all]

https://bugzilla.redhat.com/show_bug.cgi?id=1868541

su -c 'dnf upgrade --advisory FEDORA-2020-b8ebc4201e' at the command

line. For more information, refer to the dnf documentation available at

https://dnf.readthedocs.io/en/latest/command_ref.html

All packages are signed with the Fedora Project GPG key. More details on the

GPG keys used by the Fedora Project can be found at

https://fedoraproject.org/security/

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