Juniper JUNOS 5.x through JUNOS 7.x allows remote attackers to cause a denial of service (routing disabled) via a large number of MPLS packets, which are not filtered or verified before being sent to the Routing Engine, which reduces the speed at which other packets are processed.
https://exchange.xforce.ibmcloud.com/vulnerabilities/19094
http://www.securityfocus.com/bid/12379
http://www.redhat.com/support/errata/RHSA-2005-081.html
http://www.niscc.gov.uk/niscc/docs/al-20050126-00067.html?lang=en
http://www.kb.cert.org/vuls/id/JSHA-68ZJCQ
http://www.kb.cert.org/vuls/id/409555