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TUCoPS :: Linux :: Gentoo :: va2816.htm

BIND: Incorrect signature verification



BIND: Incorrect signature verification
BIND: Incorrect signature verification



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Gentoo Linux Security Advisory                           GLSA 200903-14
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http://security.gentoo.org/ 
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  Severity: Normal
     Title: BIND: Incorrect signature verification
      Date: March 09, 2009
      Bugs: #254134, #257949
        ID: 200903-14

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Synopsis
=======
Incomplete verification of RSA and DSA certificates might lead to
spoofed records authenticated using DNSSEC.

Background
=========
ISC BIND is the Internet Systems Consortium implementation of the
Domain Name System (DNS) protocol.

Affected packages
================
    -------------------------------------------------------------------
     Package       /  Vulnerable  /                         Unaffected
    -------------------------------------------------------------------
  1  net-dns/bind     < 9.4.3_p1                           >= 9.4.3_p1

Description
==========
BIND does not properly check the return value from the OpenSSL
functions to verify DSA (CVE-2009-0025) and RSA (CVE-2009-0265)
certificates.

Impact
=====
A remote attacker could bypass validation of the certificate chain to
spoof DNSSEC-authenticated records.

Workaround
=========
There is no known workaround at this time.

Resolution
=========
All BIND users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=net-dns/bind-9.4.3_p1"

References
=========
  [ 1 ] CVE-2009-0025
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-0025 
  [ 2 ] CVE-2009-0265
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-0265 

Availability
===========
This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:

http://security.gentoo.org/glsa/glsa-200903-14.xml 

Concerns?
========
Security is a primary focus of Gentoo Linux and ensuring the
confidentiality and security of our users machines is of utmost
importance to us. Any security concerns should be addressed to
security@gentoo.org or alternatively, you may file a bug at 
http://bugs.gentoo.org. 

License
======
Copyright 2009 Gentoo Foundation, Inc; referenced text
belongs to its owner(s).

The contents of this document are licensed under the
Creative Commons - Attribution / Share Alike license.

http://creativecommons.org/licenses/by-sa/2.5 

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