Linux Security
    Linux Security
    Linux Security

    ArchLinux: 202002-6: dovecot: denial of service

    Date
    485
    Posted By
    The package dovecot before version 2.3.9.3-1 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    : https://security.archlinux.org/AVG-1097
    
    Summary
    =======
    
    The package dovecot before version 2.3.9.3-1 is vulnerable to denial of
    service.
    
    Resolution
    ==========
    
    Upgrade to 2.3.9.3-1.
    
    # pacman -Syu "dovecot>=2.3.9.3-1"
    
    The problems have been fixed upstream in version 2.3.9.3.
    
    Workaround
    ==========
    
    None.
    
    Description
    ===========
    
    - CVE-2020-7046 (denial of service)
    
    A denial of service has been found in Dovecot before 2.3.9.3, 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 2.3.9.3, 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 '>'.
    
    Impact
    ======
    
    A remote, unauthenticated user can cause a denial of service via a
    crafted message.
    
    References
    ==========
    
    https://dovecot.org/pipermail/dovecot-news/2020-February/000430.html
    https://dovecot.org/pipermail/dovecot-news/2020-February/000431.html
    https://security.archlinux.org/CVE-2020-7046
    https://security.archlinux.org/CVE-2020-7957
    
    

    LinuxSecurity Poll

    How are you contributing to Open Source?

    No answer selected. Please try again.
    Please select either existing option or enter your own, however not both.
    Please select minimum 0 answer(s) and maximum 4 answer(s).
    /main-polls/37-how-are-you-contributing-to-open-source?task=poll.vote&format=json
    37
    radio
    [{"id":"127","title":"I'm involved with the development of an open-source project(s).","votes":"2","type":"x","order":"1","pct":100,"resources":[]},{"id":"128","title":"I've reported vulnerabilities I've discovered in open-source code.","votes":"0","type":"x","order":"2","pct":0,"resources":[]},{"id":"129","title":"I've provided developers with feedback on their projects.","votes":"0","type":"x","order":"3","pct":0,"resources":[]},{"id":"130","title":"I've helped another community member get started contributing to Open Source.","votes":"0","type":"x","order":"4","pct":0,"resources":[]}] ["#ff5b00","#4ac0f2","#b80028","#eef66c","#60bb22","#b96a9a","#62c2cc"] ["rgba(255,91,0,0.7)","rgba(74,192,242,0.7)","rgba(184,0,40,0.7)","rgba(238,246,108,0.7)","rgba(96,187,34,0.7)","rgba(185,106,154,0.7)","rgba(98,194,204,0.7)"] 350


    VIEW MORE POLLS

    bottom 200

    Please enable / Bitte aktiviere JavaScript!
    Veuillez activer / Por favor activa el Javascript![ ? ]

    We use cookies to provide and improve our services. By using our site, you consent to our Cookie Policy.