RHSA-2012:1259 - Security Advisory

Topic

Updated quagga packages that fix multiple 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. The Quagga
ospfd and ospf6d daemons implement the OSPF (Open Shortest Path First)
routing protocol.

A heap-based buffer overflow flaw was found in the way the bgpd daemon
processed malformed Extended Communities path attributes. An attacker could
send a specially-crafted BGP message, causing bgpd on a target system to
crash or, possibly, execute arbitrary code with the privileges of the user
running bgpd. The UPDATE message would have to arrive from an explicitly
configured BGP peer, but could have originated elsewhere in the BGP
network. (CVE-2011-3327)

A stack-based buffer overflow flaw was found in the way the ospf6d daemon
processed malformed Link State Update packets. An OSPF router could use
this flaw to crash ospf6d on an adjacent router. (CVE-2011-3323)

A flaw was found in the way the ospf6d daemon processed malformed link
state advertisements. An OSPF neighbor could use this flaw to crash
ospf6d on a target system. (CVE-2011-3324)

A flaw was found in the way the ospfd daemon processed malformed Hello
packets. An OSPF neighbor could use this flaw to crash ospfd on a
target system. (CVE-2011-3325)

A flaw was found in the way the ospfd daemon processed malformed link state
advertisements. An OSPF router in the autonomous system could use this flaw
to crash ospfd on a target system. (CVE-2011-3326)

An assertion failure was found in the way the ospfd daemon processed
certain Link State Update packets. An OSPF router could use this flaw to
cause ospfd on an adjacent router to abort. (CVE-2012-0249)

A buffer overflow flaw was found in the way the ospfd daemon processed
certain Link State Update packets. An OSPF router could use this flaw to
crash ospfd on an adjacent router. (CVE-2012-0250)

Two flaws were found in the way the bgpd daemon processed certain BGP OPEN
messages. A configured BGP peer could cause bgpd on a target system to
abort via a specially-crafted BGP OPEN message. (CVE-2012-0255,
CVE-2012-1820)

Red Hat would like to thank CERT-FI for reporting CVE-2011-3327,
CVE-2011-3323, CVE-2011-3324, CVE-2011-3325, and CVE-2011-3326; and the
CERT/CC for reporting CVE-2012-0249, CVE-2012-0250, CVE-2012-0255, and
CVE-2012-1820. CERT-FI acknowledges Riku Hietamäki, Tuomo Untinen and Jukka
Taimisto of the Codenomicon CROSS project as the original reporters of
CVE-2011-3327, CVE-2011-3323, CVE-2011-3324, CVE-2011-3325, and
CVE-2011-3326. The CERT/CC acknowledges Martin Winter at
OpenSourceRouting.org as the original reporter of CVE-2012-0249,
CVE-2012-0250, and CVE-2012-0255, and Denis Ovsienko as the original
reporter of CVE-2012-1820.

Users of quagga should upgrade to these updated packages, which contain
backported patches to correct these issues. After installing the updated
packages, the bgpd, ospfd, and ospf6d daemons will be restarted
automatically.

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/knowledge/articles/11258

Affected Products

• Red Hat Enterprise Linux Server 6 x86_64
• Red Hat Enterprise Linux Server 6 i386
• Red Hat Enterprise Linux for x86_64 - Extended Update Support 6.3 x86_64
• Red Hat Enterprise Linux for x86_64 - Extended Update Support 6.3 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 IBM z Systems - Extended Update Support 6.3 s390x
• Red Hat Enterprise Linux for Power, big endian 6 ppc64
• Red Hat Enterprise Linux for Power, big endian - Extended Update Support 6.3 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
• Red Hat Enterprise Linux Server - Extended Update Support from RHUI 6.3 x86_64
• Red Hat Enterprise Linux Server - Extended Update Support from RHUI 6.3 i386
• Red Hat Enterprise Linux Server - Extended Life Cycle Support Extension 6 x86_64
• Red Hat Enterprise Linux Server - Extended Life Cycle Support Extension 6 i386
• Red Hat Enterprise Linux Server - Extended Life Cycle Support Extension (for IBM z Systems) 6 s390x

Fixes

• BZ - 738393 - CVE-2011-3323 Quagga (ospf6d): Stack-based buffer overflow while decoding Link State Update packet with malformed Inter Area Prefix LSA
• BZ - 738394 - CVE-2011-3324 Quagga (ospf6d): Denial of service by decoding malformed Database Description packet headers
• BZ - 738396 - CVE-2011-3325 Quagga (ospfd): Denial of service by decoding too short Hello packet or Hello packet with invalid OSPFv2 header type
• BZ - 738398 - CVE-2011-3326 Quagga (ospfd): Denial of service by decoding Link State Update LSAs of unknown type
• BZ - 738400 - CVE-2011-3327 Quagga (bgpd): Heap-based buffer overflow by decoding BGP UPDATE message with unknown AS_PATH attributes
• BZ - 802781 - CVE-2012-0255 quagga (bgpd): Assertion failure by processing malformed AS4 capability in BGP OPEN message
• BZ - 802827 - CVE-2012-0249 quagga (ospfd): Assertion failure due improper length check for a received LS-Update OSPF packet
• BZ - 802829 - CVE-2012-0250 quagga (ospfd): Crash by processing LS-Update OSPF packet due improper length check of the Network-LSA structures
• BZ - 817580 - CVE-2012-1820 quagga (bgpd): Assertion failure by processing BGP OPEN message with malformed ORF capability TLV (VU#962587)

CVEs

• CVE-2011-3327
• CVE-2011-3326
• CVE-2011-3325
• CVE-2011-3324
• CVE-2011-3323
• CVE-2012-0250
• CVE-2012-0249
• CVE-2012-1820
• CVE-2012-0255

References

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