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Junos BFD Crash Vulnerability
Information
Severity
Severity
Family
Family
CVSSv2 Base
CVSSv2 Base
CVSSv2 Vector
CVSSv2 Vector
Solution Type
Solution Type
Created
Created
Modified
Modified
Summary
Junos OS is prone to a vulnerability in BFD daemon.
Insight
Insight
Receipt of a specially crafted BFD packet can cause the BFD daemon (bfdd) to crash and restart, generating a bfdd core file. The issue can affect all configurations and topologies utilizing BFD including: single-hop and multi-hop BFD, centralized and distributed mode BFD, micro-BFD and LSP BFD. Note that the bfdd crash can be triggered by a crafted BFD packet even if BFD is not enabled on the interface.
Affected Software
Affected Software
Junos OS 12.1, 12.3, 13.2, 13.3, 14.1, 14.2 and 15.1
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. As a workaround and BFD is not used at all, disable the BFD daemon by 'set system processes neighbor-liveness disable'