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RHEL 5: RHSA-2008:0789-01 Moderate: dnsmasq DNS Source Port Update

red hat
Calendar Grey August 11, 2008
Dist Redhat Esm H88
The update to DNS source-port randomization significantly enhances defense against spoofing attacks. Vital for users of Red Hat Enterprise Linux 5.
An updated dnsmasq package that implements UDP source-port randomization is now available for Red Hat Enterprise Linux 5

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

Summary

Dnsmasq is lightweight DNS forwarder and DHCP server. It is designed to provide DNS and, optionally, DHCP, to a small network.
The dnsmasq DNS resolver used a fixed source UDP port. This could have made DNS spoofing attacks easier. dnsmasq has been updated to use random UDP source ports, helping to make DNS spoofing attacks harder. (CVE-2008-1447)
All dnsmasq users are advised to upgrade to this updated package, that upgrades dnsmasq to version 2.45, which resolves this issue.

Topics%20covered

Topics Covered

security advisory network security red hat enterprise dns spoofing dnsmasq update

References

https://www.cve.org/CVERecord?id=CVE-2008-1447 https://access.redhat.com/security/updates/classification#moderate https://thekelleys.org.uk/dnsmasq/CHANGELOG

Package List

Red Hat Enterprise Linux Desktop (v. 5 client):
Source:
i386: dnsmasq-2.45-1.el5_2.1.i386.rpm dnsmasq-debuginfo-2.45-1.el5_2.1.i386.rpm
x86_64: dnsmasq-2.45-1.el5_2.1.x86_64.rpm dnsmasq-debuginfo-2.45-1.el5_2.1.x86_64.rpm
Red Hat Enterprise Linux (v. 5 server):
Source:
i386: dnsmasq-2.45-1.el5_2.1.i386.rpm dnsmasq-debuginfo-2.45-1.el5_2.1.i386.rpm
ia64: dnsmasq-2.45-1.el5_2.1.ia64.rpm dnsmasq-debuginfo-2.45-1.el5_2.1.ia64.rpm
ppc: dnsmasq-2.45-1.el5_2.1.ppc.rpm dnsmasq-debuginfo-2.45-1.el5_2.1.ppc.rpm
s390x: dnsmasq-2.45-1.el5_2.1.s390x.rpm dnsmasq-debuginfo-2.45-1.el5_2.1.s390x.rpm
x86_64: dnsmasq-2.45-1.el5_2.1.x86_64.rpm dnsmasq-debuginfo-2.45-1.el5_2.1.x86_64.rpm
These packages are GPG signed by Red Hat for security. Our key and details on how to verify the signature are available from https://access.redhat.com/security/team/key#package


Advisory ID: RHSA-2008:0789-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2008:0789.html
Issue date: 2008-08-11

Topic

An updated dnsmasq package that implements UDP source-port randomization is now available for Red Hat Enterprise Linux 5.

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

Topics%20covered

Topics Covered

security advisory network security red hat enterprise dns spoofing dnsmasq update

Relevant Releases Architectures

Red Hat Enterprise Linux Desktop (v. 5 client) - i386, x86_64

Red Hat Enterprise Linux (v. 5 server) - i386, ia64, ppc, s390x, x86_64

Bugs Fixed

449345 - CVE-2008-1447 implement source UDP port randomization (CERT VU#800113)

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