RHSA-2011:0406 - Security Advisory

Topic

Updated quagga packages that fix two security issues are now available for
Red Hat Enterprise Linux 6.

The Red Hat Security Response Team has rated this update as having moderate
security impact. Common Vulnerability Scoring System (CVSS) base scores,
which give detailed severity ratings, are available for each vulnerability
from the CVE links in the References section.

Description

Quagga is a TCP/IP based routing software suite. The Quagga bgpd daemon
implements the BGP (Border Gateway Protocol) routing protocol.

A denial of service flaw was found in the way the Quagga bgpd daemon
processed certain route metrics information. A BGP message with a
specially-crafted path limit attribute would cause the bgpd daemon to reset
its session with the peer through which this message was received.
(CVE-2010-1675)

A NULL pointer dereference flaw was found in the way the Quagga bgpd daemon
processed malformed route extended communities attributes. A configured BGP
peer could crash bgpd on a target system via a specially-crafted BGP
message. (CVE-2010-1674)

Users of quagga should upgrade to these updated packages, which contain
backported patches to correct these issues. After installing the updated
packages, the bgpd daemon must be restarted for the update to take effect.

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

Affected Products

• Red Hat Enterprise Linux Server 6 x86_64
• Red Hat Enterprise Linux Server 6 i386
• Red Hat Enterprise Linux Workstation 6 x86_64
• Red Hat Enterprise Linux Workstation 6 i386
• Red Hat Enterprise Linux for IBM z Systems 6 s390x
• Red Hat Enterprise Linux for Power, big endian 6 ppc64
• Red Hat Enterprise Linux Server from RHUI 6 x86_64
• Red Hat Enterprise Linux Server from RHUI 6 i386
• Red Hat Enterprise Linux Server - Extended Life Cycle Support 6 x86_64
• Red Hat Enterprise Linux Server - Extended Life Cycle Support 6 i386
• Red Hat Enterprise Linux Server - Extended Life Cycle Support (for IBM z Systems) 6 s390x

Fixes

• BZ - 654603 - CVE-2010-1674 quagga: DoS (crash) by processing malformed extended community attribute in a route
• BZ - 654614 - CVE-2010-1675 quagga: BGP session reset by processing BGP Update message with malformed AS-path attributes

CVEs

• CVE-2010-1674
• CVE-2010-1675

References

• https://access.redhat.com/security/updates/classification/#moderate