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Junos Oversized BGP UPDATE DoS Vulnerability
Information
Severity
Severity
Family
Family
CVSSv2 Base
CVSSv2 Base
CVSSv2 Vector
CVSSv2 Vector
Solution Type
Solution Type
Created
Created
Modified
Modified
Summary
Denial of Service vulnerability in routing daemon from oversized BGP UPDATE message.
Insight
Insight
A large BGP UPDATE message which immediately triggers a withdraw message to be sent, as demonstrated by a long AS_PATH and a large number of BGP Communities, cause the routing daemon to crash. This vulnerability can be triggered in both IPv4 and IPv6 environments.
Affected Software
Affected Software
Junos OS i10.4, 11.4, 12.1, 12.2, 12.3, 13.1, 13.2
Detection Method
Detection Method
Checks if a vulnerable OS build is present on the target host.
Solution
Solution
New builds of Junos OS software are available from Juniper. For a workaround restrict received communities and/or create an import policy to drop updates with AS_PATH longer than a specified number. See security bulletin from Juniper for further details.