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  • [SECURITY] [DSA 3904-1] bind9 security update

    From Yves-Alexis Perez@1:229/2 to All on Sat Jul 8 15:00:01 2017
    From: [email protected]

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    - ------------------------------------------------------------------------- Debian Security Advisory DSA-3904-1 [email protected] 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: [email protected]
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