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    Ubuntu 3951-1: Dovecot vulnerability

    Date
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    Posted By
    Dovecot could be made to crash if it received specially crafted network traffic.
    ==========================================================================
    Ubuntu Security Notice USN-3951-1
    April 23, 2019
    
    dovecot vulnerability
    ==========================================================================
    
    A security issue affects these releases of Ubuntu and its derivatives:
    
    - Ubuntu 19.04
    - Ubuntu 18.10
    
    Summary:
    
    Dovecot could be made to crash if it received specially crafted network
    traffic.
    
    Software Description:
    - dovecot: IMAP and POP3 email server
    
    Details:
    
    It was discovered that the Dovecot JSON encoder incorrectly handled certain
    invalid UTF-8 characters. A remote attacker could possibly use this issue
    to cause Dovecot to repeatedly crash, resulting in a denial of service.
    
    Update instructions:
    
    The problem can be corrected by updating your system to the following
    package versions:
    
    Ubuntu 19.04:
      dovecot-core                    1:2.3.4.1-1ubuntu2.1
    
    Ubuntu 18.10:
      dovecot-core                    1:2.3.2.1-1ubuntu3.3
    
    In general, a standard system update will make all the necessary changes.
    
    References:
      https://usn.ubuntu.com/usn/usn-3951-1
      CVE-2019-10691
    
    Package Information:
      https://launchpad.net/ubuntu/+source/dovecot/1:2.3.4.1-1ubuntu2.1
      https://launchpad.net/ubuntu/+source/dovecot/1:2.3.2.1-1ubuntu3.3
    
    

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