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Bug#554703: bind accepts any incomming zone transfers if t..

 
  

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Christoph Anton Mitterer
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Since: Jan 14, 2009
Posts: 29



PostPosted: Thu Nov 05, 2009 10:10 pm    Post subject: Bug#554703: bind accepts any incomming zone transfers if the tsig key is not found
Archived from groups: linux>debian>bugs>rc (more info?)

Package: bind9
Version: 1:9.6.1.dfsg.P1-3
Severity: critical
Tags: security

Hi.

I think this is quite security critical,... if my observations should
prove wrong, decrease than please priority Wink

When bind is configured to us TSIGs between master and slave when
tranferring a zone, via a
master 1.2.3.4 key somekey;
statement in a slave zone it should probably not accept such incoming
transfers from the master at 1.2.3.4 if somekey is no configured at
all in the local bind.
I does however:
Nov 6 01:10:05 kronecker named[21547]: zone example.com/IN: unable to
find key: a.example.net-b.example.net
Nov 6 01:10:05 kronecker named[21547]: zone example.com/IN: Transfer started.

I think this is quite critical as typos could easily happen, and bind
does not even refuse to start when a key that is referenced somewhere
wasn't declared.

Regards,
Chris.

Perhaps this should be sent to upstream, too.

-- System Information:
Debian Release: squeeze/sid
APT prefers unstable
APT policy: (500, 'unstable')
Architecture: i386 (i686)

Kernel: Linux 2.6.30-2-686 (SMP w/1 CPU core)
Locale: LANG=en_DE.UTF-8, LC_CTYPE=en_DE.UTF-8 (charmap=UTF-Cool
Shell: /bin/sh linked to /bin/dash

Versions of packages bind9 depends on:
ii adduser 3.111 add and remove users and groups
ii bind9utils 1:9.6.1.dfsg.P1-3 Utilities for BIND
ii debconf [debconf-2.0] 1.5.28 Debian configuration
management sy
ii libbind9-50 1:9.6.1.dfsg.P1-3 BIND9 Shared Library used by BIND
ii libc6 2.10.1-5 GNU C Library: Shared libraries
ii libcap2 1:2.17-2 support for
getting/setting POSIX.
ii libdb4.7 4.7.25-8 Berkeley v4.7 Database
Libraries [
ii libdns50 1:9.6.1.dfsg.P1-3 DNS Shared Library used by BIND
ii libgssapi-krb5-2 1.7dfsg~beta3-1 MIT Kerberos runtime
libraries - k
ii libisc50 1:9.6.1.dfsg.P1-3 ISC Shared Library used by BIND
ii libisccc50 1:9.6.1.dfsg.P1-3 Command Channel Library
used by BI
ii libisccfg50 1:9.6.1.dfsg.P1-3 Config File Handling Library used
ii libldap-2.4-2 2.4.17-2 OpenLDAP libraries
ii liblwres50 1:9.6.1.dfsg.P1-3 Lightweight Resolver Library used
ii libssl0.9.8 0.9.8k-5 SSL shared libraries
ii libxml2 2.7.6.dfsg-1 GNOME XML library
ii lsb-base 3.2-23 Linux Standard Base 3.2
init scrip
ii net-tools 1.60-23 The NET-3 networking toolkit
ii netbase 4.37 Basic TCP/IP networking system
bind9 recommends no packages.

Versions of packages bind9 suggests:
ii bind9-doc 1:9.6.1.dfsg.P1-3 Documentation for BIND
ii dnsutils 1:9.6.1.dfsg.P1-3 Clients provided with BIND
ii resolvconf 1.45 name server information handler
pn ufw <none> (no description available)

-- debconf information:
* bind9/different-configuration-file:
* bind9/run-resolvconf: true
* bind9/start-as-user: bind

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