VAR-200210-0277

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

Cisco Virtual Private Network (VPN) Client software 2.x.x, and 3.x before 3.5.1C, does not properly verify that certificate DN fields match those of the certificate from the VPN Concentrator, which allows remote attackers to conduct man-in-the-middle attacks. A flaw in the Cisco VPN Client prevents the client from sufficiently validating credentials supplied in a certificate used for VPN privacy. The client does not properly validate Distinguished Names (DN) contained in some certificates, and may trust certificates supplied by a third party that represent a malicious host. 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: CSCdw87717

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