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The remote device is missing a vendor-supplied security patch.
Multiple vulnerabilities exist in the Session Initiation Protocol
(SIP) implementation in Cisco IOS Software that could allow an
unauthenticated, remote attacker to cause a reload of an affected
device when SIP operation is enabled. Cisco has released free software
updates that address these vulnerabilities. There are no workarounds
for devices that must run SIP; however, mitigations are available to
limit exposure to the vulnerabilities.
See also :
Apply the relevant patch referenced in Cisco Security Advisory
Risk factor :
High / CVSS Base Score : 7.8
CVSS Temporal Score : 6.4
Public Exploit Available : true