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Cisco Bug: CSCuw24694 - Cisco ACS SSH Login Denial of Service (DoS) Vulnerability

Last Modified

Feb 20, 2018

Products (1)

  • Cisco Secure Access Control Server Solution Engine

Known Affected Releases

5.7(0.15)

Description (partial)

Symptom:
A vulnerability in the Secure Shell (SSH) feature of the Cisco Secure Access Control Server (ACS) 
could allow an authenticated, remote attacker to cause a partial denial of service (DoS) condition due
 to the SSH screen process unexpectedly terminating.

The vulnerability is due to improper input validation of user commands entered at the Command Line Interface (CLI)
or GUI. An attacker could exploit this vulnerability by logging into the affected device and executing crafted user 
commands. An exploit could allow the attacker to cause a partial DoS due to the SSH screen processes unexpectedly
terminating. That SSH connection is then lost and the user must login and authenticate again.

Conditions:
Device running with default configuration running an affected version of software.
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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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