Ubuntu 1143-1: Dovecot vulnerability

    Date01 Jun 2011
    CategoryUbuntu
    95
    Posted ByLinuxSecurity Advisories
    An attacker could send a crafted email message that could disrupt emailservice.
    ==========================================================================
    Ubuntu Security Notice USN-1143-1
    June 02, 2011
    
    dovecot vulnerability
    ==========================================================================
    
    A security issue affects these releases of Ubuntu and its derivatives:
    
    - Ubuntu 11.04
    - Ubuntu 10.10
    - Ubuntu 10.04 LTS
    
    Summary:
    
    An attacker could send a crafted email message that could disrupt email
    service.
    
    Software Description:
    - dovecot: IMAP and POP3 email server
    
    Details:
    
    It was discovered that the message header parser in Dovecot did not
    properly handle '\0' characters in header names. This could allow a
    remote attacker to cause a denial of service through a crafted email
    message by crashing the Dovecot daemon or corrupting mailboxes.
    
    Update instructions:
    
    The problem can be corrected by updating your system to the following
    package versions:
    
    Ubuntu 11.04:
      dovecot-common                  1:1.2.15-3ubuntu2.1
    
    Ubuntu 10.10:
      dovecot-common                  1:1.2.12-1ubuntu8.2
    
    Ubuntu 10.04 LTS:
      dovecot-common                  1:1.2.9-1ubuntu6.4
    
    In general, a standard system update will make all the necessary changes.
    
    References:
      CVE-2011-1929
    
    Package Information:
      https://launchpad.net/ubuntu/+source/dovecot/1:1.2.15-3ubuntu2.1
      https://launchpad.net/ubuntu/+source/dovecot/1:1.2.12-1ubuntu8.2
      https://launchpad.net/ubuntu/+source/dovecot/1:1.2.9-1ubuntu6.4
    
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