RHSA-2007:0740

Executive Summary

Summary
Title	bind security update

Informations
Name	RHSA-2007:0740	First vendor Publication	2007-07-24
Vendor	RedHat	Last vendor Modification	2007-07-24
Severity (Vendor)	Moderate	Revision	01

Security-Database Scoring CVSS v2

Cvss vector : (AV:N/AC:M/Au:N/C:N/I:P/A:N)
Cvss Base Score	4.3	Attack Range	Network
Cvss Impact Score	2.9	Attack Complexity	Medium
Cvss Expoit Score	8.6	Authentification	None Required
Calculate full CVSS 2.0 Vectors scores

Detail

Problem Description:

Updated bind packages that fix a security issue are now available.

This update has been rated as having moderate security impact by the Red
Hat Security Response Team.

2. Relevant releases/architectures:

Red Hat Enterprise Linux AS (Advanced Server) version 2.1 - i386, ia64
Red Hat Linux Advanced Workstation 2.1 - ia64
Red Hat Enterprise Linux ES version 2.1 - i386
Red Hat Enterprise Linux WS version 2.1 - i386
Red Hat Enterprise Linux AS version 3 - i386, ia64, ppc, s390, s390x, x86_64
Red Hat Desktop version 3 - i386, x86_64
Red Hat Enterprise Linux ES version 3 - i386, ia64, x86_64
Red Hat Enterprise Linux WS version 3 - i386, ia64, x86_64
Red Hat Enterprise Linux AS version 4 - i386, ia64, ppc, s390, s390x, x86_64
Red Hat Enterprise Linux Desktop version 4 - i386, x86_64
Red Hat Enterprise Linux ES version 4 - i386, ia64, x86_64
Red Hat Enterprise Linux WS version 4 - i386, ia64, x86_64
Red Hat Enterprise Linux Desktop (v. 5 client) - i386, x86_64
RHEL Desktop Workstation (v. 5 client) - i386, x86_64
Red Hat Enterprise Linux (v. 5 server) - i386, ia64, ppc, s390x, x86_64

3. Problem description:

ISC BIND (Berkeley Internet Name Domain) is an implementation of the DNS
(Domain Name System) protocols.

A flaw was found in the way BIND generates outbound DNS query ids. If an
attacker is able to acquire a finite set of query IDs, it becomes possible
to accurately predict future query IDs. Future query ID prediction may
allow an attacker to conduct a DNS cache poisoning attack, which can result
in the DNS server returning incorrect client query data. (CVE-2007-2926)

Users of BIND are advised to upgrade to these updated packages, which
contain backported patches to correct this issue.

4. Solution:

Before applying this update, make sure that all previously-released
errata relevant to your system have been applied.

This update is available via Red Hat Network. Details on how to use
the Red Hat Network to apply this update are available at
http://kbase.redhat.com/faq/FAQ_58_10188

5. Bug IDs fixed (http://bugzilla.redhat.com/):

248851 - CVE-2007-2926 bind cryptographically weak query ids

Original Source

Url : https://rhn.redhat.com/errata/RHSA-2007-0740.html

OVAL Definitions

Definition Id: oval:org.mitre.oval:def:2226

Oval ID:	oval:org.mitre.oval:def:2226
Title:	Security Vulnerability in Solaris 10 BIND: Susceptible to Cache Poisoning Attack
Description:	ISC BIND 9 through 9.5.0a5 uses a weak random number generator during generation of DNS query ids when answering resolver questions or sending NOTIFY messages to slave name servers, which makes it easier for remote attackers to guess the next query id and perform DNS cache poisoning.
Family:	unix	Class:	vulnerability
Reference(s):	CVE-2007-2926	Version:	1
Platform(s):	Sun Solaris 10	Product(s):
Definition Synopsis:
Solaris 10 (SPARC) meets Sun Alert 103018 Solaris 10 (SPARC) is installed AND BIND DNS Name server (SUNWbind) is installed AND NOT Patch 119783-05 or later installed OR Solaris 10 (x86) meets Sun Alert 103018 Solaris 10 (x86) is installed AND BIND DNS Name server (SUNWbind) installed AND NOT Patch 119784-05 or later installed

Definition Id: oval:org.mitre.oval:def:10293

Oval ID:	oval:org.mitre.oval:def:10293
Title:	ISC BIND 9 through 9.5.0a5 uses a weak random number generator during generation of DNS query ids when answering resolver questions or sending NOTIFY messages to slave name servers, which makes it easier for remote attackers to guess the next query id and perform DNS cache poisoning.
Description:	ISC BIND 9 through 9.5.0a5 uses a weak random number generator during generation of DNS query ids when answering resolver questions or sending NOTIFY messages to slave name servers, which makes it easier for remote attackers to guess the next query id and perform DNS cache poisoning.
Family:	unix	Class:	vulnerability
Reference(s):	CVE-2007-2926	Version:	5
Platform(s):	Red Hat Enterprise Linux 3 CentOS Linux 3 Red Hat Enterprise Linux 4 CentOS Linux 4 Oracle Linux 4 Red Hat Enterprise Linux 5 CentOS Linux 5 Oracle Linux 5	Product(s):
Definition Synopsis:
OS Section: RHEL3, CentOS3 RHEL3 or CentOS3 The operating system installed on the system is Red Hat Enterprise Linux 3 AND CentOS Linux 3.x AND Configuration section bind-utils is earlier than 20:9.2.4-21.el3 AND bind-devel is earlier than 20:9.2.4-21.el3 AND bind-chroot is earlier than 20:9.2.4-21.el3 AND bind is earlier than 20:9.2.4-21.el3 AND bind-libs is earlier than 20:9.2.4-21.el3 OR OS Section: RHEL4, CentOS4, Oracle Linux 4 RHEL4, CentOS4 or Oracle Linux 4 The operating system installed on the system is Red Hat Enterprise Linux 4 AND CentOS Linux 4.x AND Oracle Linux 4.x AND Configuration section bind-utils is earlier than 20:9.2.4-27.0.1.el4 AND bind-devel is earlier than 20:9.2.4-27.0.1.el4 AND bind-chroot is earlier than 20:9.2.4-27.0.1.el4 AND bind is earlier than 20:9.2.4-27.0.1.el4 AND bind-libs is earlier than 20:9.2.4-27.0.1.el4 OR OS Section: RHEL5, CentOS5, Oracle Linux 5 RHEL5, CentOS5 or Oracle Linux 5 The operating system installed on the system is Red Hat Enterprise Linux 5 AND CentOS Linux 5.x AND Oracle Linux 5.x AND Configuration section bind-utils is earlier than 30:9.3.3-9.0.1.el5 AND bind-libbind-devel is earlier than 30:9.3.3-9.0.1.el5 AND bind-devel is earlier than 30:9.3.3-9.0.1.el5 AND bind-chroot is earlier than 30:9.3.3-9.0.1.el5 AND caching-nameserver is earlier than 30:9.3.3-9.0.1.el5 AND bind-sdb is earlier than 30:9.3.3-9.0.1.el5 AND bind is earlier than 30:9.3.3-9.0.1.el5 AND bind-libs is earlier than 30:9.3.3-9.0.1.el5

CPE : Common Platform Enumeration

Type	Description	Count
Application	Isc Bind cpe:/a:isc:bind:9.5.0a5 cpe:/a:isc:bind:9.5.0a4 cpe:/a:isc:bind:9.5.0a3 cpe:/a:isc:bind:9.5.0a2 cpe:/a:isc:bind:9.5.0a1 cpe:/a:isc:bind:9.5 cpe:/a:isc:bind:9.4 cpe:/a:isc:bind:9.3 cpe:/a:isc:bind:9.2 cpe:/a:isc:bind:9.1 cpe:/a:isc:bind:9.0	11

Open Source Vulnerability Database (OSVDB)

id	Description
36235	ISC BIND Predictable DNS Query IDs Cache Poisoning

Type	Count
Oval ID(s)	2
CPE ID(s)	11
osvdb(s)	1

Related	Severity
CVE-2007-2926	(Medium)

Same Subject	Severity
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RHSA-2007:0740

Executive Summary

Security-Database Scoring CVSS v2

Detail

Original Source

OVAL Definitions

CPE : Common Platform Enumeration

Open Source Vulnerability Database (OSVDB)

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