Bug 991457 - (CVE-2013-0149) CVE-2013-0149 quagga (ospfd): Possibility to use invalid / duplicate LSA information (VU#229804)
CVE-2013-0149 quagga (ospfd): Possibility to use invalid / duplicate LSA info...
Status: CLOSED NOTABUG
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
unspecified
All Linux
medium Severity medium
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Assigned To: Red Hat Product Security
impact=moderate,public=20130801,repor...
: Security
Depends On:
Blocks: 968577
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Reported: 2013-08-02 08:43 EDT by Jan Lieskovsky
Modified: 2013-08-02 09:24 EDT (History)
4 users (show)

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Doc Type: Bug Fix
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Last Closed: 2013-08-02 09:24:04 EDT
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Description Jan Lieskovsky 2013-08-02 08:43:34 EDT
A security flaw was found in the way how certain Open Shortest Path First (OSPF) protocol implementations used to perform Link State Advertisement (LSA) identifiers lookup in the LSA database during the routing table calculation phase (certain implementations searched for LSA id using only Link State ID). On certain implementations a remote attacker could use this flaw to subvert the routing table of the victim router by sending false link state advertisements on behalf of other routers (resulting into situation where the victim router would drop the entire table [denial of service] or re-route the network traffic).

References:
[1] http://www.kb.cert.org/vuls/id/229804
[2] https://bugzilla.novell.com/show_bug.cgi?id=822572

The OSPF protocol implementation in Quagga routing suite was not vulnerable to this problem:
[3] http://lists.quagga.net/pipermail/quagga-dev/2013-August/010701.html

since it performs LSA id lookup based on two identifiers - (Router-ID, LS-ID) pair.
Comment 2 Jan Lieskovsky 2013-08-02 09:24:04 EDT
Statement:

Not vulnerable. This issue did not affect the versions of quagga as shipped with Red Hat Enterprise Linux 5 and 6, since the OSPF protocol implementation in Quagga performs LSA id lookup based on two identifiers - (Router-ID, LS-ID) pair.

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