ESB-2017.1713.2 - UPDATE [Debian] bind9: Multiple vulnerabilities 2017-07-24

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             AUSCERT External Security Bulletin Redistribution

                              ESB-2017.1713.2
                           bind9 security update
                               24 July 2017

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        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           bind9
Publisher:         Debian
Operating System:  Debian GNU/Linux 9
Impact/Access:     Access Confidential Data       -- Remote/Unauthenticated
                   Provide Misleading Information -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2017-3143 CVE-2017-3142 

Reference:         ESB-2017.1640

Original Bulletin: 
   http://www.debian.org/security/2017/dsa-3904

Revision History:  July 24 2017: DSA-3904-1 introduced a regression
                   July 10 2017: Initial Release

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- -------------------------------------------------------------------------
Debian Security Advisory DSA-3904-2                   security@debian.org
https://www.debian.org/security/                        Yves-Alexis Perez
July 23, 2017                         https://www.debian.org/security/faq
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Package        : bind9
Debian Bug     : 868952

The security update announced as DSA-3904-1 in bind9 introduced a regression.
The fix for CVE-2017-3142 broke verification of TSIG signed TCP message
sequences where not all the messages contain TSIG records. This is conform to
the spec and may be used in AXFR and IXFR response.

For the oldstable distribution (jessie), this problem has been fixed
in version 1:9.9.5.dfsg-9+deb8u13.

For the stable distribution (stretch), this problem has been fixed in
version 1:9.10.3.dfsg.P4-12.3+deb9u2.

For the testing distribution (buster), this problem has been fixed
in version 1:9.10.3.dfsg.P4-12.5.

For the unstable distribution (sid), this problem has been fixed in
version 1:9.10.3.dfsg.P4-12.5.

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: debian-security-announce@lists.debian.org

====

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Debian Security Advisory DSA-3904-1                   security@debian.org
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

Clement 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/

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