VAR-200210-0275

Vulnerability from variot - Updated: 2025-04-03 22:14

Cisco Virtual Private Network (VPN) Client software 2.x.x and 3.x before 3.0.5 allows remote attackers to cause a denial of service (crash) via TCP packets with source and destination ports of 137 (NETBIOS). It is possible for a remote attacker to exploit this condition to shut down a connection that the client has initiated by sending a NETBIOS packet to port 137 of the host running the client. It can be used under the Microsoft Windows operating system, and can also be used under the Linux operating system. CISCO designated this vulnerability number as: CSCdt35749

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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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