Alerts This Week
Warning Icon 1 692
Alerts This Week
Warning Icon 1 692

Red Hat Linux 4, 5, 6 RHSA-2011:1160-01 Moderate: DHCP DoS Threat

red hat
Calendar Grey August 15, 2011
Dist Redhat Esm H88
Several vulnerabilities in DHCP can result in Denial of Service; new patches released for Red Hat Enterprise Linux. Ensure you install the update immediately!
Updated dhcp packages that fix two security issues are now available for Red Hat Enterprise Linux 4, 5, and 6

Solution

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

This update is available via the Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at https://access.redhat.com/kb/docs/DOC-11259

Summary

The Dynamic Host Configuration Protocol (DHCP) is a protocol that allows individual devices on an IP network to get their own network configuration information, including an IP address, a subnet mask, and a broadcast address.
Two denial of service flaws were found in the way the dhcpd daemon handled certain incomplete request packets. A remote attacker could use these flaws to crash dhcpd via a specially-crafted request. (CVE-2011-2748, CVE-2011-2749)
Users of DHCP should upgrade to these updated packages, which contain a backported patch to correct these issues. After installing this update, all DHCP servers will be restarted automatically.

Topics%20covered

Topics Covered

security advisory denial of service update red hat dhcp risk

References

https://access.redhat.com/security/cve/CVE-2011-2748 https://access.redhat.com/security/cve/CVE-2011-2749 https://access.redhat.com/security/updates/classification/#moderate

Package List

Red Hat Enterprise Linux AS version 4:
Source:
i386: dhclient-3.0.1-68.el4.i386.rpm dhcp-3.0.1-68.el4.i386.rpm dhcp-debuginfo-3.0.1-68.el4.i386.rpm dhcp-devel-3.0.1-68.el4.i386.rpm
ia64: dhclient-3.0.1-68.el4.ia64.rpm dhcp-3.0.1-68.el4.ia64.rpm dhcp-debuginfo-3.0.1-68.el4.ia64.rpm dhcp-devel-3.0.1-68.el4.ia64.rpm
ppc: dhclient-3.0.1-68.el4.ppc.rpm dhcp-3.0.1-68.el4.ppc.rpm dhcp-debuginfo-3.0.1-68.el4.ppc.rpm dhcp-devel-3.0.1-68.el4.ppc.rpm
s390: dhclient-3.0.1-68.el4.s390.rpm dhcp-3.0.1-68.el4.s390.rpm dhcp-debuginfo-3.0.1-68.el4.s390.rpm dhcp-devel-3.0.1-68.el4.s390.rpm
s390x: dhclient-3.0.1-68.el4.s390x.rpm dhcp-3.0.1-68.el4.s390x.rpm dhcp-debuginfo-3.0.1-68.el4.s390x.rpm dhcp-devel-3.0.1-68.el4.s390x.rpm
x86_64: dhclient-3.0.1-68.el4.x86_64.rpm dhcp-3.0.1-68.el4.x86_64.rpm dhcp-debuginfo-3.0.1-68.el4.x86_64.rpm dhcp-devel-3.0.1-68.el4.x86_64.rpm
Red Hat Enterprise Linux Desktop version 4:
Source:
i386: dhclient-3.0.1-68.el4.i386.rpm dhcp-3.0.1-68.el4.i386.rpm dhcp-debuginfo-3.0.1-68.el4.i386.rpm dhcp-devel-3.0.1-68.el4.i386.rpm
x86_64: dhclient-3.0.1-68.el4.x86_64.rpm dhcp-3.0.1-68.el4.x86_64.rpm dhcp-debuginfo-3.0.1-68.el4.x86_64.rpm dhcp-devel-3.0.1-68.el4.x86_64.rpm
Red Hat Enterprise Linux ES version 4:
Source:
i386: dhclient-3.0.1-68.el4.i386.rpm

Read the Full Advisory


Advisory ID: RHSA-2011:1160-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2011:1160.html
Issue date: 2011-08-15

Topic

Updated dhcp packages that fix two security issues are now available forRed Hat Enterprise Linux 4, 5, and 6.The Red Hat Security Response Team has rated this update as having moderatesecurity impact. Common Vulnerability Scoring System (CVSS) base scores,which give detailed severity ratings, are available for each vulnerabilityfrom the CVE links in the References section.

Topics%20covered

Topics Covered

security advisory denial of service update red hat dhcp risk

Relevant Releases Architectures

RHEL Desktop Workstation (v. 5 client) - i386, x86_64

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

Red Hat Enterprise Linux AS version 4 - i386, ia64, ppc, s390, s390x, x86_64

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

Red Hat Enterprise Linux Desktop (v. 6) - i386, x86_64

Red Hat Enterprise Linux Desktop Optional (v. 6) - i386, 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 HPC Node (v. 6) - x86_64

Red Hat Enterprise Linux HPC Node Optional (v. 6) - x86_64

Red Hat Enterprise Linux Server (v. 6) - i386, ppc64, s390x, x86_64

Red Hat Enterprise Linux Server Optional (v. 6) - i386, ppc64, s390x, x86_64

Red Hat Enterprise Linux WS version 4 - i386, ia64, x86_64

Red Hat Enterprise Linux Workstation (v. 6) - i386, x86_64

Red Hat Enterprise Linux Workstation Optional (v. 6) - i386, x86_64

Bugs Fixed

729382 - CVE-2011-2748 CVE-2011-2749 dhcp: denial of service flaws

Get the latest News and Insights

Get the latest Linux and open source security news straight to your inbox.

Your message here