ArchLinux: 202002-6: dovecot: denial of service

    Date13 Feb 2020
    Posted ByLinuxSecurity Advisories
    The package dovecot before version is vulnerable to denial of service.
    Arch Linux Security Advisory ASA-202002-6
    Severity: Medium
    Date    : 2020-02-12
    CVE-ID  : CVE-2020-7046 CVE-2020-7957
    Package : dovecot
    Type    : denial of service
    Remote  : Yes
    Link    :
    The package dovecot before version is vulnerable to denial of
    Upgrade to
    # pacman -Syu "dovecot>="
    The problems have been fixed upstream in version
    - CVE-2020-7046 (denial of service)
    A denial of service has been found in Dovecot before, where
    lib-smtp doesn't handle truncated command parameters properly,
    resulting in infinite loop taking 100% CPU for the process. This
    happens for LMTP (where it doesn't matter so much) and also for
    submission-login where unauthenticated users can trigger it.
    - CVE-2020-7957 (denial of service)
    A denial of service have been found in Dovecot before, where a
    specially crafted e-mail can cause a mailbox to have permanently
    inaccessible mail, or the e-mail itself can be stuck in delivery. This
    happens because the snippet generation crashes if a message is large
    enough that message-parser returns multiple body blocks, the first
    block(s) don't contain the full snippet (e.g. full of whitespace) and
    the input ends with '>'.
    A remote, unauthenticated user can cause a denial of service via a
    crafted message.

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