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             AUSCERT External Security Bulletin Redistribution

                   USN-4256-1: Cyrus SASL vulnerability
                              29 January 2020


        AusCERT Security Bulletin Summary

Product:           cyrus-sasl2
Publisher:         Ubuntu
Operating System:  Ubuntu
Impact/Access:     Execute Arbitrary Code/Commands -- Remote/Unauthenticated
                   Denial of Service               -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2019-19906  

Reference:         ESB-2019.4770.2

Original Bulletin: 

- --------------------------BEGIN INCLUDED TEXT--------------------

USN-4256-1: Cyrus SASL vulnerability
28 January 2020

cyrus-sasl2 vulnerability
A security issue affects these releases of Ubuntu and its derivatives:

  o Ubuntu 19.10
  o Ubuntu 18.04 LTS
  o Ubuntu 16.04 LTS
  o Ubuntu 14.04 ESM
  o Ubuntu 12.04 ESM


Cyrus SASL could be made to crash or execute arbitrary code if it received a
specially crafted LDAP packet.

Software Description

  o cyrus-sasl2 - Cyrus Simple Authentication and Security Layer


It was discovered that Cyrus SASL incorrectly handled certain LDAP packets. An
attacker could possibly use this issue to execute arbitrary code or cause a
denial of service.

Update instructions

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

Ubuntu 19.10
    libsasl2-2 - 2.1.27+dfsg-1ubuntu0.1
Ubuntu 18.04 LTS
    libsasl2-2 - 2.1.27~101-g0780600+dfsg-3ubuntu2.1
Ubuntu 16.04 LTS
    libsasl2-2 - 2.1.26.dfsg1-14ubuntu0.2
Ubuntu 14.04 ESM
    libsasl2-2 - 2.1.25.dfsg1-17ubuntu0.1~esm1
Ubuntu 12.04 ESM
    libsasl2-2 - 2.1.25.dfsg1-3ubuntu0.2

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

After a standard system update you need to restart services using SASL to
effect the necessary changes.


  o CVE-2019-19906

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