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Cisco Bug: CSCut12263 - AnyConnect Large Headend Response Application Crash

Last Modified

Mar 28, 2017

Products (1)

  • Cisco AnyConnect Secure Mobility Client

Known Affected Releases

4.0(2049)

Description (partial)

Symptom:
A vulnerability in the extensible markup language parsing and handling during the virtual private network establishment phase of Cisco AnyConnect
Secure Mobility Client could allow an unauthenticated, remote attacker to cause a denial of service condition.

The vulnerability is due to insufficient input validation of messages received from the headend. An attacker could exploit this vulnerability by
enducing a victim to connect to an attacker controlled headend. An exploit could allow the attacker to crash the AnyConnect application. A
successful attack requires the attacker to trick the victim, or their computer into connecting to an attacker controlled headend.

Conditions:
None
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Bug Details Include

  • Full Description (including symptoms, conditions and workarounds)
  • Status
  • Severity
  • Known Fixed Releases
  • Related Community Discussions
  • Number of Related Support Cases
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