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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)

Symptom:
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.

Conditions:
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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Bug Details Include

  • Full Description (including symptoms, conditions and workarounds)
  • Status
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