This update fixes a remote denial of service bug in quagga that can be triggered via an AS path containing ASN elements whose string representation is longer than expected. (CVE-2009-1572)

It was discovered that the BGP service in Quagga did not correctly handle certain AS paths containing 4-byte ASNs. An authenticated remote attacker could exploit this flaw to cause bgpd to abort, leading to a denial of service.

Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

The remote Solaris system is missing necessary patches to address security updates :

  - bgpd in Quagga before 0.99.9 allows explicitly     configured BGP peers to cause a denial of service     (crash) via a malformed (1) OPEN message or (2) a     COMMUNITY attribute, which triggers a NULL pointer     dereference. NOTE: vector 2 only exists when debugging     is enabled. (CVE-2007-4826)

  - The BGP daemon (bgpd) in Quagga 0.99.11 and earlier     allows remote attackers to cause a denial of service     (crash) via an AS path containing ASN elements whose     string representation is longer than expected, which     triggers an assert error. (CVE-2009-1572)

  - The extended-community parser in bgpd in Quagga before     0.99.18 allows remote attackers to cause a denial of     service (NULL pointer dereference and application crash)     via a malformed Extended Communities attribute.
    (CVE-2010-1674)

  - bgpd in Quagga before 0.99.18 allows remote attackers to     cause a denial of service (session reset) via a     malformed AS_PATHLIMIT path attribute. (CVE-2010-1675)

  - Stack-based buffer overflow in the     bgp_route_refresh_receive function in bgp_packet.c in     bgpd in Quagga before 0.99.17 allows remote     authenticated users to cause a denial of service (daemon     crash) or possibly execute arbitrary code via a     malformed Outbound Route Filtering (ORF) record in a BGP     ROUTE-REFRESH (RR) message. (CVE-2010-2948)

  - bgpd in Quagga before 0.99.17 does not properly parse AS     paths, which allows remote attackers to cause a denial     of service (NULL pointer dereference and daemon crash)     via an unknown AS type in an AS path attribute in a BGP     UPDATE message. (CVE-2010-2949)

  - The OSPFv3 implementation in ospf6d in Quagga before     0.99.19 allows remote attackers to cause a denial of     service (out-of-bounds memory access and daemon crash)     via a Link State Update message with an invalid IPv6     prefix length. (CVE-2011-3323)

  - The ospf6_lsa_is_changed function in ospf6_lsa.c in the     OSPFv3 implementation in ospf6d in Quagga before 0.99.19     allows remote attackers to cause a denial of service     (assertion failure and daemon exit) via trailing zero     values in the Link State Advertisement (LSA) header list     of an IPv6 Database Description message. (CVE-2011-3324)

  - ospf_packet.c in ospfd in Quagga before 0.99.19 allows     remote attackers to cause a denial of service (daemon     crash) via (1) a 0x0a type field in an IPv4 packet     header or (2) a truncated IPv4 Hello packet.
    (CVE-2011-3325)

  - The ospf_flood function in ospf_flood.c in ospfd in     Quagga before 0.99.19 allows remote attackers to cause a     denial of service (daemon crash) via an invalid Link     State Advertisement (LSA) type in an IPv4 Link State     Update message. (CVE-2011-3326)

The latest upstream version fixes serious assert crashing with ASN4's.

Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Debian Security Team reports :

It was discovered that Quagga, an IP routing daemon, could no longer process the Internet routing table due to broken handling of multiple 4-byte AS numbers in an AS path. If such a prefix is received, the BGP daemon crashes with an assert failure leading to a denial of service.

According to its self-reported version number, the installation of Quagga's BGP daemon listening on the remote host is affected by a denial of service vulnerability. The issue can be triggered via an AS path containing ASN elements whose string representation is longer than expected.

It was discovered that Quagga, an IP routing daemon, could no longer process the Internet routing table due to broken handling of multiple 4-byte AS numbers in an AS path. If such a prefix is received, the BGP daemon crashes with an assert failure, leading to a denial of service.

ID	Name	Product	Family	Published	Updated	Severity
41451	SuSE 11 Security Update : quagga (SAT Patch Number 864)	Nessus	SuSE Local Security Checks	9/24/2009	1/14/2021	medium
38758	Ubuntu 6.06 LTS / 8.04 LTS / 8.10 / 9.04 : quagga vulnerability (USN-775-1)	Nessus	Ubuntu Local Security Checks	5/13/2009	1/19/2021	medium
41299	SuSE9 Security Update : quagga (YOU Patch Number 12416)	Nessus	SuSE Local Security Checks	9/24/2009	1/14/2021	medium
80751	Oracle Solaris Third-Party Patch Update : quagga (multiple_denial_of_service_vulnerabilities4)	Nessus	Solaris Local Security Checks	1/19/2015	1/14/2021	medium
41582	SuSE 10 Security Update : quagga (ZYPP Patch Number 6240)	Nessus	SuSE Local Security Checks	9/24/2009	1/14/2021	medium
38863	Fedora 11 : quagga-0.99.12-1.fc11 (2009-5324)	Nessus	Fedora Local Security Checks	5/22/2009	1/11/2021	medium
40119	openSUSE Security Update : quagga (quagga-866)	Nessus	SuSE Local Security Checks	7/21/2009	1/14/2021	medium
38697	FreeBSD : quagga -- Denial of Service (2748fdde-3a3c-11de-bbc5-00e0815b8da8)	Nessus	FreeBSD Local Security Checks	5/7/2009	1/6/2021	medium
59787	Quagga < 0.99.12 BGPD Denial of Service Vulnerability	Nessus	Misc.	6/29/2012	11/15/2018	medium
38690	Debian DSA-1788-1 : quagga - improper assertion	Nessus	Debian Local Security Checks	5/6/2009	1/4/2021	medium
40303	openSUSE Security Update : quagga (quagga-866)	Nessus	SuSE Local Security Checks	7/21/2009	1/14/2021	medium
39418	openSUSE 10 Security Update : quagga (quagga-6233)	Nessus	SuSE Local Security Checks	6/16/2009	1/14/2021	medium
38862	Fedora 10 : quagga-0.99.12-1.fc10 (2009-5284)	Nessus	Fedora Local Security Checks	5/22/2009	1/11/2021	medium

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