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             AUSCERT External Security Bulletin Redistribution

                               ESB-2020.1762
                    USN-4361-1: Dovecot vulnerabilities
                                19 May 2020

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

Product:           Dovecot
Publisher:         Ubuntu
Operating System:  Ubuntu
                   UNIX variants (UNIX, Linux, OSX)
Impact/Access:     Execute Arbitrary Code/Commands -- Remote/Unauthenticated
                   Denial of Service               -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2020-10967 CVE-2020-10958 CVE-2020-10957

Original Bulletin: 
   https://usn.ubuntu.com/4361-1/

Comment: This advisory references vulnerabilities in products which run on 
         platforms other than Ubuntu. It is recommended that administrators 
         running Dovecot check for an updated version of the software for 
         their operating system.

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USN-4361-1: Dovecot vulnerabilities
18 May 2020

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

  o Ubuntu 20.04 LTS
  o Ubuntu 19.10

Summary

Several security issues were fixed in Dovecot.

Software Description

  o dovecot - IMAP and POP3 email server

Details

Philippe Antoine discovered that Dovecot incorrectly handled certain data. An
attacker could possibly use this issue to cause a denial of service.
(CVE-2020-10957, CVE-2020-10967)

Philippe Antoine discovered that Dovecot incorrectly handled certain data. An
attacker could possibly use this issue to cause a denial of service or execute
arbitrary code. (CVE-2020-10958)

Update instructions

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

Ubuntu 20.04 LTS
    dovecot-core - 1:2.3.7.2-1ubuntu3.1
Ubuntu 19.10
    dovecot-core - 1:2.3.4.1-5ubuntu3.1

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-2020-10957
  o CVE-2020-10958
  o CVE-2020-10967

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