This update should fix CVE-2007-4826 quagga bgpd DoS. For more info see rhbz#285691.

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.

Updated quagga packages that fix multiple security issues are now available for Red Hat Enterprise Linux 4 and 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.

A stack-based buffer overflow flaw was found in the way the Quagga bgpd daemon processed certain BGP Route Refresh (RR) messages. A configured BGP peer 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.
(CVE-2010-2948)

Note: On Red Hat Enterprise Linux 5 it is not possible to exploit CVE-2010-2948 to run arbitrary code as the overflow is blocked by FORTIFY_SOURCE.

Multiple NULL pointer dereference flaws were found in the way the Quagga bgpd daemon processed certain specially crafted BGP messages. A configured BGP peer could crash bgpd on a target system via specially crafted BGP messages. (CVE-2007-4826)

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.

From Red Hat Security Advisory 2010:0785 :

Updated quagga packages that fix multiple security issues are now available for Red Hat Enterprise Linux 4 and 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.

A stack-based buffer overflow flaw was found in the way the Quagga bgpd daemon processed certain BGP Route Refresh (RR) messages. A configured BGP peer 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.
(CVE-2010-2948)

Note: On Red Hat Enterprise Linux 5 it is not possible to exploit CVE-2010-2948 to run arbitrary code as the overflow is blocked by FORTIFY_SOURCE.

Multiple NULL pointer dereference flaws were found in the way the Quagga bgpd daemon processed certain specially crafted BGP messages. A configured BGP peer could crash bgpd on a target system via specially crafted BGP messages. (CVE-2007-4826)

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.

It was discovered that BGP peers can trigger a NULL pointer dereference in the BGP daemon if debug logging is enabled, causing the BGP daemon to crash.

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)

It was discovered that Quagga did not correctly verify OPEN messages or COMMUNITY attributes sent from configured peers. Malicious authenticated remote peers could send a specially crafted message which would 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.

According to its self-reported version number, the installation of Quagga's BGP daemon listening on the remote host is affected by multiple denial of service vulnerabilities :

  - A denial of service vulnerability can be triggered by a     malformed OPEN message from an explicitly configured BGP     peer.

  - A denial of service vulnerability can be triggered by a     malformed COMMUNITY attribute from an explicitly     configured BGP peer, when the daemon has debugging     enabled.

A stack-based buffer overflow flaw was found in the way the Quagga bgpd daemon processed certain BGP Route Refresh (RR) messages. A configured BGP peer 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.
(CVE-2010-2948)

Note: On Scientific Linux 5 it is not possible to exploit CVE-2010-2948 to run arbitrary code as the overflow is blocked by FORTIFY_SOURCE.

Multiple NULL pointer dereference flaws were found in the way the Quagga bgpd daemon processed certain specially crafted BGP messages. A configured BGP peer could crash bgpd on a target system via specially crafted BGP messages. (CVE-2007-4826)

After installing the updated packages, the bgpd daemon must be restarted for the update to take effect.

ID	Name	Product	Family	Published	Updated	Severity
27756	Fedora 7 : quagga-0.99.9-1.fc7 (2007-2196)	Nessus	Fedora Local Security Checks	11/6/2007	1/11/2021	low
50794	CentOS 4 / 5 : quagga (CESA-2010:0785)	Nessus	CentOS Local Security Checks	11/24/2010	1/4/2021	medium
68122	Oracle Linux 4 / 5 : quagga (ELSA-2010-0785)	Nessus	Oracle Linux Local Security Checks	7/12/2013	1/14/2021	medium
26975	Debian DSA-1382-1 : quagga - NULL pointer dereference	Nessus	Debian Local Security Checks	10/12/2007	1/4/2021	low
50077	RHEL 4 / 5 : quagga (RHSA-2010:0785)	Nessus	Red Hat Local Security Checks	10/21/2010	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
28117	Ubuntu 6.06 LTS / 6.10 / 7.04 : quagga vulnerability (USN-512-1)	Nessus	Ubuntu Local Security Checks	11/10/2007	1/19/2021	low
59795	Quagga < 0.99.9 BGPD Multiple Denial of Service Vulnerabilities	Nessus	Misc.	6/29/2012	11/15/2018	low
60875	Scientific Linux Security Update : quagga on SL4.x, SL5.x i386/x86_64	Nessus	Scientific Linux Local Security Checks	8/1/2012	1/14/2021	medium

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