A vulnerability in SMART-SSL Accelerator functionality for Cisco Wide Area Application Services (WAAS) 6.2.1, 6.2.1a, and 6.2.3a 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. Cisco Bug IDs: CSCvb71133.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Wide_area_application_services | Cisco | 6.2.1 (including) | 6.2.1 (including) |
| Wide_area_application_services | Cisco | 6.2.1a (including) | 6.2.1a (including) |
| Wide_area_application_services | Cisco | 6.2.3a (including) | 6.2.3a (including) |
References
- http://www.securityfocus.com/bid/98294
- http://www.securitytracker.com/id/1038399
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170503-waas
- http://www.securityfocus.com/bid/98294
- http://www.securitytracker.com/id/1038399
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170503-waas