Debian: DSA-3904-1: bind9 security update

    Date08 Jul 2017
    CategoryDebian
    72
    Posted ByLinuxSecurity Advisories
    Clément Berthaux from Synaktiv discovered two vulnerabilities in BIND, a DNS server implementation. They allow an attacker to bypass TSIG authentication by sending crafted DNS packets to a server.
    
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    Debian Security Advisory DSA-3904-1                   This email address is being protected from spambots. You need JavaScript enabled to view it.
    https://www.debian.org/security/                        Yves-Alexis Perez
    July 08, 2017                         https://www.debian.org/security/faq
    - -------------------------------------------------------------------------
    
    Package        : bind9
    CVE ID         : CVE-2017-3142 CVE-2017-3143
    Debian Bug     : 866564
    
    Clément Berthaux from Synaktiv discovered two vulnerabilities in BIND, a DNS
    server implementation. They allow an attacker to bypass TSIG authentication by
    sending crafted DNS packets to a server.
    
    CVE-2017-3142
    
        An attacker who is able to send and receive messages to an authoritative
        DNS server and who has knowledge of a valid TSIG key name may be able to
        circumvent TSIG authentication of AXFR requests via a carefully constructed
        request packet. A server that relies solely on TSIG keys for protection
        with no other ACL protection could be manipulated into:
        - providing an AXFR of a zone to an unauthorized recipient
        - accepting bogus NOTIFY packets
    
    CVE-2017-3143
    
        An attacker who is able to send and receive messages to an authoritative
        DNS server and who has knowledge of a valid TSIG key name for the zone and
        service being targeted may be able to manipulate BIND into accepting an
        unauthorized dynamic update. 
    
    For the oldstable distribution (jessie), these problems have been fixed
    in version 1:9.9.5.dfsg-9+deb8u12.
    
    For the stable distribution (stretch), these problems have been fixed in
    version 1:9.10.3.dfsg.P4-12.4.
    
    We recommend that you upgrade your bind9 packages.
    
    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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