1. Topic:
Several security vulnerabilities exist in the DNS server, 'bind'.

2. Problem description:
Various vulnerabilities exist in previous versions of bind:

• A bug in the processing of NXT records can theoretically allow a remote attacker to gain access to the DNS server as the user running bind (by default, root). This vulnerability does not affect the bind packages that shipped with Red Hat Linux 4.2 and Red Hat Linux 5.2.
• Several remote denial-of-service attacks are possible; by using abnormal TCP options, causing the DNS server to use many file descriptors, or using special SIG records, it may be possible to crash the DNS server.

  It is recommended that all users of bind upgrade to the latest packages.

  Thanks go to ISC for providing the updated packages.

  3. Bug IDs fixed: (see bugzilla for more information)
  

  4. Relevant releases/architectures:
  Red Hat Linux 6.1, all architectures

  5. Obsoleted by:
  None

  6. Conflicts with:
  None

  7. RPMs required:
  

  Intel:

  bind- 8.2.2_P3-1.i386.rpm
  bind- devel-8.2.2_P3-1.i386.rpm
  bind- utils-8.2.2_P3-1.i386.rpm
  

  Alpha:

  bind- 8.2.2_P3-1.alpha.rpm
  bind-devel-8.2.2_P3-1.alpha.rpm
  bind-utils-8.2.2_P3-1.alpha.rpm
  

  SPARC:

  bind- 8.2.2_P3-1.sparc.rpm
  bind-devel-8.2.2_P3-1.sparc.rpm
  bind-utils-8.2.2_P3-1.sparc.rpm
  

  Source:

  bind- 8.2.2_P3-1.src.rpm

  8. Solution:
  For each RPM for your particular architecture, run:

  rpm -Uvh filename

  where filename is the name of the RPM.

  Then you will want to restart the named service like so:

  /etc/rc.d/init.d/named stop
  /etc/rc.d/init.d/named start

  9. Verification:
  

  
   MD5 sum                           Package Name
  
   -------------------------------------------------------------------------
  f0c2e341fe81310d3031be7e0d67225f  i386/bind-8.2.2_P3-1.i386.rpm
  4f34e526ec52c94b9cd3411892f920df  i386/bind-devel-8.2.2_P3-1.i386.rpm
  5cb10493b44f9fe2a9c6667ebe0a0a8f  i386/bind-utils-8.2.2_P3-1.i386.rpm
  94e19627ae83388e7d4795f45676c4b6  alpha/bind-8.2.2_P3-1.alpha.rpm
  06932040ed8b8ff5eb8edb09c069acf9  alpha/bind-devel-8.2.2_P3-1.alpha.rpm
  de0fa8d33d877d2ed7f8d26949b4a937  alpha/bind-utils-8.2.2_P3-1.alpha.rpm
  54b757c6e240d4c82ca740ac49eb3db7  sparc/bind-8.2.2_P3-1.sparc.rpm
  8453658392c3b2a321f7647eb875d5d2  sparc/bind-devel-8.2.2_P3-1.sparc.rpm
  9894188ea1e8a5f657f13d940091114d  sparc/bind-utils-8.2.2_P3-1.sparc.rpm
  987d55828aab270e14777a034d029cea  SRPMS/bind-8.2.2_P3-1.src.rpm
   
  
   

  These packages are GPG signed by Red Hat, Inc. for security. Our key is available at:
  

  You can verify each package with the following command: rpm --checksig filename

  If you only wish to verify that each package has not been corrupted or tampered with, examine only the md5sum with the following command: rpm --checksig --nogpg filename

  Note that you need RPM >= 3.0 to check GnuPG keys.

  10. References: