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Computer Security Incident Response Team of Mauritius (CERT-MU)

VN-2017-65


Cisco Wide Area Application Services SMART-SSL Accelerator Denial of Service Vulnerability
Severity Rating: Medium
Systems Affected:
  • Cisco Wide Area Application Services (WAAS)
Description
A vulnerability in SMART-SSL Accelerator functionality for Cisco Wide Area Application Services (WAAS) could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition where the WAN optimization could stop functioning while the process restarts. The vulnerability is due to a Secure Sockets Layer/Transport Layer Security (SSL/TLS) alert being incorrectly handled when in a specific SSL/TLS connection state. An attacker could exploit this vulnerability by establishing a SMART-SSL connection through the targeted device. The attacker would then send a crafted stream of SSL/TLS traffic. An exploit could allow the attacker to cause a DoS condition where WAN optimization could stop processing traffic for a short period of time.
 
Solution
Users are advised to apply updates.
More information about the update is available on:
 
Vendor Information
Cisco
 
References
Cisco Security Bulletin
 
Security Tracker
 
Contact Information
 
Postal address
Mauritian Computer Emergency Response Team (CERT-MU)
National Computer Board
7th Floor, Stratton Court
La Poudriere Street
Port Louis