ESB-2019.1094 - [Ubuntu] Dovecot: Multiple vulnerabilities 2019-04-02

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2019.1094
                     USN-3928-1: Dovecot vulnerability
                               2 April 2019

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

Product:           Dovecot
Publisher:         Ubuntu
Operating System:  Ubuntu
Impact/Access:     Execute Arbitrary Code/Commands -- Existing Account
                   Increased Privileges            -- Existing Account
                   Denial of Service               -- Existing Account
Resolution:        Patch/Upgrade
CVE Names:         CVE-2019-7524  

Reference:         ESB-2019.1071
                   ESB-2019.1045
                   ESB-2019.1038

Original Bulletin: 
   https://usn.ubuntu.com/3928-1/

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USN-3928-1: Dovecot vulnerability

1 April 2019

dovecot vulnerability

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

  o Ubuntu 18.10
  o Ubuntu 18.04 LTS
  o Ubuntu 16.04 LTS
  o Ubuntu 14.04 LTS

Summary

Dovecot could be made to crash or run programs as an administrator if it opened
a specially crafted file.

Software Description

  o dovecot - IMAP and POP3 email server

Details

It was discovered that Dovecot incorrectly handled reading certain headers from
the index. A local attacker could possibly use this issue to escalate
privileges.

Update instructions

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

Ubuntu 18.10
    dovecot-core - 1:2.3.2.1-1ubuntu3.2
Ubuntu 18.04 LTS
    dovecot-core - 1:2.2.33.2-1ubuntu4.3
Ubuntu 16.04 LTS
    dovecot-core - 1:2.2.22-1ubuntu2.10
Ubuntu 14.04 LTS
    dovecot-core - 1:2.2.9-1ubuntu2.6

To update your system, please follow these instructions: https://
wiki.ubuntu.com/Security/Upgrades .

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

References

  o CVE-2019-7524

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