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Cisco Bug: CSCuo09383 - ASA WebVPN Memory leak leading to Blank Portal Page/AnyConnect failure

Last Modified

Apr 16, 2020

Products (1)

  • Cisco ASA 5500-X Series Firewalls

Known Affected Releases

100.12(0.18) 9.1(3.4)

Description (partial)

Clientless WebVPN sessions fail with the following symptoms:
- When the user initiates the session, SSL Handshake takes place
- then the GET request for logon.html is sent from the client to the server, for which the server sends no response.
- Also, the client sends GET requests for favicon.ico, for which ASA sends 404.
- And the Session is gracefully terminated, where the FIN is initiated by the ASA.

AnyConnect connections fail to come up as well.

ASA acting as SSLVPN Server for Clientless or Client-based [AnyConnect] sessions.

show memory - would show the utilisation at around 60%
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