Security Advisory zebra security update

Advisory: RHSA-2006:0533-4
Type: Security Advisory
Severity: Moderate
Issued on: 2006-06-01
Last updated on: 2006-06-01
Affected Products: Red Hat Enterprise Linux AS (v. 2.1)
Red Hat Linux Advanced Workstation 2.1 for the Itanium Processor
CVEs ( CVE-2006-2223


Updated zebra packages that fix several security vulnerabilities are now

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

GNU Zebra is a free software that manages TCP/IP based routing protocol.

An information disclosure flaw was found in the way GNU Zebra interprets
RIP REQUEST packets. RIPd in GNU Zebra will respond to RIP REQUEST packets
for RIP versions that have been disabled or that have authentication
enabled, allowing a remote attacker to acquire information about the local
network. (CVE-2006-2223)

A route injection flaw was found in the way GNU Zebra interprets RIPv1
RESPONSE packets when RIPv2 authentication is enabled. It is possible for a
remote attacker to inject arbitrary route information into the RIPd routing
tables. This issue does not affect GNU Zebra configurations where only
RIPv2 is specified. (CVE-2006-2224)

A denial of service flaw was found in GNU Zebra's telnet interface. If an
attacker is able to connect to the GNU Zebra telnet interface, it is
possible to cause GNU Zebra to consume vast quantities of CPU resources by
issuing a malformed 'sh' command. (CVE-2006-2276)

Users of GNU Zebra should upgrade to these updated packages, which contain
backported patches that correct these issues.


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

This update is available via Red Hat Network. To use Red Hat Network,
launch the Red Hat Update Agent with the following command:


This will start an interactive process that will result in the appropriate
RPMs being upgraded on your system.

Updated packages

Red Hat Enterprise Linux AS (v. 2.1)

zebra-0.91a-11.21AS.i386.rpm     MD5: 4d2926158a338aa627b941e3e03e9fbc
zebra-0.91a-11.21AS.ia64.rpm     MD5: abb964bf1fe301e0faea7e05c4bd048f
Red Hat Linux Advanced Workstation 2.1 for the Itanium Processor

zebra-0.91a-11.21AS.ia64.rpm     MD5: abb964bf1fe301e0faea7e05c4bd048f
(The unlinked packages above are only available from the Red Hat Network)

Bugs fixed (see bugzilla for more information)

192757 - CVE-2006-2224 zebra RIPd route injection
192758 - CVE-2006-2276 zebra locks with command sh ip bgp
192759 - CVE-2006-2223 zebra RIPd information disclosure


These packages are GPG signed by Red Hat for security. Our key and details on how to verify the signature are available from:

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