Fedora 31: dovecot FEDORA-2020-b60344c987

    Date 27 May 2020
    199
    Posted By LinuxSecurity Advisories
    - CVE-2020-10957: lmtp/submission: A client can crash the server by sending a NOOP command with an invalid string parameter. This occurs particularly for a parameter that doesn't start with a double quote. This applies to all SMTP services, including submission-login, which makes it possible to crash the submission service without authentication. - CVE-2020-10958: lmtp/submission:
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    Fedora Update Notification
    FEDORA-2020-b60344c987
    2020-05-28 01:59:14.571867
    --------------------------------------------------------------------------------
    
    Name        : dovecot
    Product     : Fedora 31
    Version     : 2.3.10.1
    Release     : 1.fc31
    URL         : https://www.dovecot.org/
    Summary     : Secure imap and pop3 server
    Description :
    Dovecot is an IMAP server for Linux/UNIX-like systems, written with security
    primarily in mind.  It also contains a small POP3 server.  It supports mail
    in either of maildir or mbox formats.
    
    The SQL drivers and authentication plug-ins are in their subpackages.
    
    --------------------------------------------------------------------------------
    Update Information:
    
    - CVE-2020-10957: lmtp/submission: A client can crash the server by   sending a
    NOOP command with an invalid string parameter. This occurs   particularly for a
    parameter that doesn't start with a double quote.   This applies to all SMTP
    services, including submission-login, which   makes it possible to crash the
    submission service without   authentication. - CVE-2020-10958: lmtp/submission:
    Sending many invalid or unknown   commands can cause the server to access freed
    memory, which can lead   to a server crash. This happens when the server closes
    the connection   with a "421 Too many invalid commands" error. The bad command
    limit   depends on the service (lmtp or submission) and varies between 10 to
    20 bad commands. - CVE-2020-10967: lmtp/submission: Issuing the RCPT command
    with an   address that has the empty quoted string as local-part causes the
    lmtp service to crash.
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    ChangeLog:
    
    * Mon May 18 2020 Michal Hlavinka  - 1:2.3.10.1-1
    - dovecot updated to 2.3.10.1
    - fixes CVE-2020-10967, CVE-2020-10958, CVE-2020-10957
    --------------------------------------------------------------------------------
    References:
    
      [ 1 ] Bug #1834317 - CVE-2020-10957 dovecot: malformed NOOP commands leads to DoS
            https://bugzilla.redhat.com/show_bug.cgi?id=1834317
      [ 2 ] Bug #1834323 - CVE-2020-10958 dovecot: command followed by sufficient number of newlines leads to use-after-free
            https://bugzilla.redhat.com/show_bug.cgi?id=1834323
      [ 3 ] Bug #1834326 - CVE-2020-10967 dovecot: sending mail with empty quoted localpart leads to DoS
            https://bugzilla.redhat.com/show_bug.cgi?id=1834326
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    This update can be installed with the "dnf" update program. Use
    su -c 'dnf upgrade --advisory FEDORA-2020-b60344c987' at the command
    line. For more information, refer to the dnf documentation available at
    https://dnf.readthedocs.io/en/latest/command_ref.html#upgrade-command-label
    
    All packages are signed with the Fedora Project GPG key. More details on the
    GPG keys used by the Fedora Project can be found at
    https://fedoraproject.org/keys
    --------------------------------------------------------------------------------
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