ESB-2018.0637.2 - UPDATE [Ubuntu] dovecot-core: Multiple vulnerabilities 2018-04-04

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             AUSCERT External Security Bulletin Redistribution

                              ESB-2018.0637.2
                          Dovecot vulnerabilities
                               4 April 2018

===========================================================================

        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           dovecot-core
Publisher:         Ubuntu
Operating System:  Ubuntu
Impact/Access:     Access Confidential Data -- Remote/Unauthenticated
                   Denial of Service        -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2017-15130 CVE-2017-14461 

Reference:         ESB-2018.0622

Original Bulletin: 
   https://www.ubuntu.com/usn/usn-3587-1
   https://www.ubuntu.com/usn/usn-3587-2

Comment: This bulletin contains two (2) Ubuntu security advisories.

Revision History:  April 4 2018: Added notice for Ubuntu 12.04 ESM
                   March 6 2018: Initial Release

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==========================================================================
Ubuntu Security Notice USN-3587-1
March 05, 2018

dovecot vulnerabilities
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- - Ubuntu 17.10
- - Ubuntu 16.04 LTS
- - Ubuntu 14.04 LTS

Summary:

Several security issues were fixed in Dovecot.

Software Description:
- - dovecot: IMAP and POP3 email server

Details:

It was discovered that Dovecot incorrectly handled parsing certain email
addresses. A remote attacker could use this issue to cause Dovecot to
crash, resulting in a denial of service, or possibly obtain sensitive
information. (CVE-2017-14461)

It was discovered that Dovecot incorrectly handled TLS SNI config lookups.
A remote attacker could possibly use this issue to cause Dovecot to crash,
resulting in a denial of service. (CVE-2017-15130)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 17.10:
  dovecot-core                    1:2.2.27-3ubuntu1.3

Ubuntu 16.04 LTS:
  dovecot-core                    1:2.2.22-1ubuntu2.7

Ubuntu 14.04 LTS:
  dovecot-core                    1:2.2.9-1ubuntu2.4

In general, a standard system update will make all the necessary changes.

References:
  https://usn.ubuntu.com/usn/usn-3587-1
  CVE-2017-14461, CVE-2017-15130

Package Information:
  https://launchpad.net/ubuntu/+source/dovecot/1:2.2.27-3ubuntu1.3
  https://launchpad.net/ubuntu/+source/dovecot/1:2.2.22-1ubuntu2.7
  https://launchpad.net/ubuntu/+source/dovecot/1:2.2.9-1ubuntu2.4

==========================================================================
Ubuntu Security Notice USN-3587-2
April 02, 2018

dovecot vulnerabilities
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- - Ubuntu 12.04 ESM

Summary:

Several security issues were fixed in Dovecot.

Software Description:
- - dovecot: IMAP and POP3 email server

Details:

USN-3587-1 fixed a vulnerability in Dovecot. This update provides
the corresponding update for Ubuntu 12.04 ESM.

Original advisory details:

 It was discovered that Dovecot incorrectly handled parsing certain
 email addresses. A remote attacker could use this issue to cause
 Dovecot to crash, resulting in a denial of service, or possibly obtain
 sensitive information. (CVE-2017-14461)

 It was discovered that Dovecot incorrectly handled TLS SNI config
 lookups. A remote attacker could possibly use this issue to cause
 Dovecot to crash, resulting in a denial of service. (CVE-2017-15130)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 12.04 ESM:
  dovecot-core 1:2.0.19-0ubuntu2.5

In general, a standard system update will make all the necessary
changes.

References:
  https://usn.ubuntu.com/usn/usn-3587-2
  https://usn.ubuntu.com/usn/usn-3587-1
  CVE-2017-14461, CVE-2017-15130

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