Juniper Junos contains a flaw in the Flow Daemon (flowd) that may allow a remote denial of service. The issue is triggered when handling TCP packet sequences. This may allow a remote attacker to crash the system.
It has been reported that this issue has been fixed. Upgrade to releases built on or after 2013-09-18, or versions 10.4S14, 11.4R5-S2, 11.4R6, 12.1R3, 12.1X44-D20, and 12.1X45-D15, or higher, to address this vulnerability.
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