Linux Security
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    Linux Security

    Debian: DSA-4745-1: dovecot security update

    Date 12 Aug 2020
    192
    Posted By LinuxSecurity Advisories
    Several vulnerabilities have been discovered in the Dovecot email server. CVE-2020-12100
    
    - -------------------------------------------------------------------------
    Debian Security Advisory DSA-4745-1                   This email address is being protected from spambots. You need JavaScript enabled to view it.
    https://www.debian.org/security/                     Salvatore Bonaccorso
    August 12, 2020                       https://www.debian.org/security/faq
    - -------------------------------------------------------------------------
    
    Package        : dovecot
    CVE ID         : CVE-2020-12100 CVE-2020-12673 CVE-2020-12674
    
    Several vulnerabilities have been discovered in the Dovecot email
    server.
    
    CVE-2020-12100
    
        Receiving mail with deeply nested MIME parts leads to resource
        exhaustion as Dovecot attempts to parse it.
    
    CVE-2020-12673
    
        Dovecot's NTLM implementation does not correctly check message
        buffer size, which leads to a crash when reading past allocation.
    
    CVE-2020-12674
    
        Dovecot's RPA mechanism implementation accepts zero-length message,
        which leads to assert-crash later on.
    
    For the stable distribution (buster), these problems have been fixed in
    version 1:2.3.4.1-5+deb10u3.
    
    We recommend that you upgrade your dovecot packages.
    
    For the detailed security status of dovecot please refer to its security
    tracker page at:
    https://security-tracker.debian.org/tracker/dovecot
    
    Further information about Debian Security Advisories, how to apply
    these updates to your system and frequently asked questions can be
    found at: https://www.debian.org/security/
    
    Mailing list: This email address is being protected from spambots. You need JavaScript enabled to view it.
    

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