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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