This update fixes the following security issues :

  - 718056: OSPF6D buffer overflow while decoding Link State     Update with Inter Area Prefix Lsa. (CVE-2011-3323)

  - 718058: OSPF6D DoS while decoding Database Description     packet. (CVE-2011-3324)

  - 718059: OSPFD DoS while decoding Hello packet.
    (CVE-2011-3325)

  - 718061: OSPFD DoS while decoding Link State Update.
    (CVE-2011-3326)

  - 718062: DoS while decoding EXTENDED_COMMUNITIES in     Quagga's BGP (CVE-2011-3327)

The remote host is affected by the vulnerability described in GLSA-201202-02 (Quagga: Multiple vulnerabilities)

    Multiple vulnerabilities have been discovered in Quagga. Please review       the CVE identifiers referenced below for details.
  Impact :

    A BGP peer could send a Route-Refresh message with specially crafted ORF       record, which can cause Quagga's bgpd to crash or possibly execute       arbitrary code with the privileges of the user running Quagga's bgpd; a       BGP update AS path request with unknown AS type, or malformed       AS-Pathlimit or Extended-Community attributes could lead to Denial of       Service (daemon crash), an error in bgpd when handling AS_PATH attributes       within UPDATE messages can       be exploited to cause a heap-based buffer overflow resulting in a crash       of the       daemon and disruption of IPv4 routing, two errors in ospf6d and ospfd can       each be exploited to crash the daemon and disrupt IP routing.
  Workaround :

    There is no known workaround at this time.

According to its self-reported version number, the installation of Quagga listening on the remote host is affected by multiple vulnerabilities :

  - A denial of service vulnerability in OSPF6D can be     triggered by a specially crafted Link Status Update     message with an invalid IPv6 prefix length.
    (CVE-2011-3323)

  - A denial of service vulnerability in OSPF6D can be     triggered by a specially crafted IPv6 Database     Description message with trailing zero values in the     Link State Advertisement header list. (CVE-2011-3324)

  - A denial of service vulnerability in OSPFD can be     triggered by a 0x0A type field in an IPv4 packet header     or a truncated IPv4 Hello packet. (CVE-2011-3325)

  - A denial of service vulnerability in OSPFD can be     triggered by a specially crafted IPv4 Link State Update     message with an invalid Link State Advertisement type.
    (CVE-2011-3326)

  - A heap-based buffer overflow in BGPD can be triggered by     a specially crafted UPDATE message over IPv4.
    (CVE-2011-3326)

Updated quagga packages that fix multiple security issues are now available for Red Hat Enterprise Linux 5.

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.

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 NULL pointer dereference flaw was found in the way the 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)

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)

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 and CVE-2012-0250. CERT-FI acknowledges Riku Hietamaki, 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 and CVE-2012-0250.

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.

ID	名称	产品	系列	发布时间	最近更新时间	严重程度
57131	SuSE 11.1 Security Update : quagga (SAT Patch Number 5169)	Nessus	SuSE Local Security Checks	2011/12/13	2021/1/19	high
58081	GLSA-201202-02 : Quagga: Multiple vulnerabilities	Nessus	Gentoo Local Security Checks	2012/2/22	2021/1/6	high
59790	Quagga < 0.99.19 Multiple Vulnerabilities	Nessus	Misc.	2012/6/29	2019/12/4	high
62066	CentOS 5 : quagga (CESA-2012:1258)	Nessus	CentOS Local Security Checks	2012/9/13	2021/1/4	high

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