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Quagga "reachable/unreachable" NLRI Attributes Denial of Service
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Secunia Advisory:
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SA24808
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Release Date:
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2007-04-10
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Last Update:
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2007-04-18
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Popularity:
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4,867 views
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Critical:
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Less critical
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Impact:
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DoS
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Where:
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From remote
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Solution Status:
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Unpatched
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| Software: | Quagga 0.x
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| CVE reference: | CVE-2007-1995
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Description:
Paul Jakma has reported a vulnerability in Quagga, which can be exploited by malicious users to cause a DoS (Denial of Service).
The vulnerability is caused due to bgpd not checking the length information of the "MP_UNREACH_NLRI" and "MP_REACH_NLRI" attributes. This can be exploited to cause an assertion error or out of bounds read by sending a specially crafted UPDATE message.
Successful exploitation requires that the attacker is configured as peer of the victim system.
The vulnerability is reported in all existing Quagga versions.
Solution:
Connect to trusted peers only.
Provided and/or discovered by:
Paul Jakma
Changelog:
2007-04-18: Added CVE reference.
Original Advisory:
http://www.quagga.net/news2.php?y=2007&m=4&d=8#id1176073740
http://bugzilla.quagga.net/show_bug.cgi?id=354
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Please note: The information that this Secunia Advisory is based on comes from a third party unless stated otherwise.
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