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    Ubuntu 4361-1: Dovecot vulnerabilities

    Date
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    Several security issues were fixed in Dovecot.
    ==========================================================================
    Ubuntu Security Notice USN-4361-1
    May 18, 2020
    
    dovecot vulnerabilities
    ==========================================================================
    
    A security issue affects these releases of Ubuntu and its derivatives:
    
    - Ubuntu 20.04 LTS
    - Ubuntu 19.10
    
    Summary:
    
    Several security issues were fixed in Dovecot.
    
    Software Description:
    - 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
    
    In general, a standard system update will make all the necessary changes.
    
    References:
      https://usn.ubuntu.com/4361-1
      CVE-2020-10957, CVE-2020-10958, CVE-2020-10967
    
    Package Information:
      https://launchpad.net/ubuntu/+source/dovecot/1:2.3.7.2-1ubuntu3.1
      https://launchpad.net/ubuntu/+source/dovecot/1:2.3.4.1-5ubuntu3.1
    

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