The Nortel PC Client SIP Soft Phone 4.1 3.5.208 allows remote attackers to cause a denial of service (device crash) via a SIP message with a malformed header.
CVSS Severity (version 2.0):
Impact Subscore: 6.9
Exploitability Subscore: 10.0
CVSS Version 2 Metrics:
Access Vector: Network exploitable
Access Complexity: Low
Authentication: Not required to exploit
Impact Type: Allows disruption of service
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Vulnerable software and versions