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=====================================================================
                   Red Hat Security Advisory

Synopsis:          Moderate: quagga security update
Advisory ID:       RHSA-2012:1259-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://rhn.redhat.com/errata/RHSA-2012-1259.html
Issue date:        2012-09-12
CVE Names:         CVE-2011-3323 CVE-2011-3324 CVE-2011-3325 
                   CVE-2011-3326 CVE-2011-3327 CVE-2012-0249 
                   CVE-2012-0250 CVE-2012-0255 CVE-2012-1820 
=====================================================================

1. Summary:

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.

2. Relevant releases/architectures:

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

3. 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.

4. 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

5. Bugs fixed (https://bugzilla.redhat.com/):

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

6. Package List:

Red Hat Enterprise Linux Server (v. 6):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Server/en/os/SRPMS/quagga-0.99.15-7.el6_3.2.src.rpm

i386:
quagga-0.99.15-7.el6_3.2.i686.rpm
quagga-debuginfo-0.99.15-7.el6_3.2.i686.rpm

ppc64:
quagga-0.99.15-7.el6_3.2.ppc64.rpm
quagga-debuginfo-0.99.15-7.el6_3.2.ppc64.rpm

s390x:
quagga-0.99.15-7.el6_3.2.s390x.rpm
quagga-debuginfo-0.99.15-7.el6_3.2.s390x.rpm

x86_64:
quagga-0.99.15-7.el6_3.2.x86_64.rpm
quagga-debuginfo-0.99.15-7.el6_3.2.x86_64.rpm

Red Hat Enterprise Linux Server Optional (v. 6):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Server/en/os/SRPMS/quagga-0.99.15-7.el6_3.2.src.rpm

i386:
quagga-contrib-0.99.15-7.el6_3.2.i686.rpm
quagga-debuginfo-0.99.15-7.el6_3.2.i686.rpm
quagga-devel-0.99.15-7.el6_3.2.i686.rpm

ppc64:
quagga-contrib-0.99.15-7.el6_3.2.ppc64.rpm
quagga-debuginfo-0.99.15-7.el6_3.2.ppc.rpm
quagga-debuginfo-0.99.15-7.el6_3.2.ppc64.rpm
quagga-devel-0.99.15-7.el6_3.2.ppc.rpm
quagga-devel-0.99.15-7.el6_3.2.ppc64.rpm

s390x:
quagga-contrib-0.99.15-7.el6_3.2.s390x.rpm
quagga-debuginfo-0.99.15-7.el6_3.2.s390.rpm
quagga-debuginfo-0.99.15-7.el6_3.2.s390x.rpm
quagga-devel-0.99.15-7.el6_3.2.s390.rpm
quagga-devel-0.99.15-7.el6_3.2.s390x.rpm

x86_64:
quagga-contrib-0.99.15-7.el6_3.2.x86_64.rpm
quagga-debuginfo-0.99.15-7.el6_3.2.i686.rpm
quagga-debuginfo-0.99.15-7.el6_3.2.x86_64.rpm
quagga-devel-0.99.15-7.el6_3.2.i686.rpm
quagga-devel-0.99.15-7.el6_3.2.x86_64.rpm

Red Hat Enterprise Linux Workstation (v. 6):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Workstation/en/os/SRPMS/quagga-0.99.15-7.el6_3.2.src.rpm

i386:
quagga-0.99.15-7.el6_3.2.i686.rpm
quagga-debuginfo-0.99.15-7.el6_3.2.i686.rpm

x86_64:
quagga-0.99.15-7.el6_3.2.x86_64.rpm
quagga-debuginfo-0.99.15-7.el6_3.2.x86_64.rpm

Red Hat Enterprise Linux Workstation Optional (v. 6):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Workstation/en/os/SRPMS/quagga-0.99.15-7.el6_3.2.src.rpm

i386:
quagga-contrib-0.99.15-7.el6_3.2.i686.rpm
quagga-debuginfo-0.99.15-7.el6_3.2.i686.rpm
quagga-devel-0.99.15-7.el6_3.2.i686.rpm

x86_64:
quagga-contrib-0.99.15-7.el6_3.2.x86_64.rpm
quagga-debuginfo-0.99.15-7.el6_3.2.i686.rpm
quagga-debuginfo-0.99.15-7.el6_3.2.x86_64.rpm
quagga-devel-0.99.15-7.el6_3.2.i686.rpm
quagga-devel-0.99.15-7.el6_3.2.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

7. References:

https://www.redhat.com/security/data/cve/CVE-2011-3323.html
https://www.redhat.com/security/data/cve/CVE-2011-3324.html
https://www.redhat.com/security/data/cve/CVE-2011-3325.html
https://www.redhat.com/security/data/cve/CVE-2011-3326.html
https://www.redhat.com/security/data/cve/CVE-2011-3327.html
https://www.redhat.com/security/data/cve/CVE-2012-0249.html
https://www.redhat.com/security/data/cve/CVE-2012-0250.html
https://www.redhat.com/security/data/cve/CVE-2012-0255.html
https://www.redhat.com/security/data/cve/CVE-2012-1820.html
https://access.redhat.com/security/updates/classification/#moderate

8. Contact:

The Red Hat security contact is <secalert@redhat.com>.  More contact
details at https://access.redhat.com/security/team/contact/

Copyright 2012 Red Hat, Inc.
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