CVE-2017-6628 Denial of service in Cisco Wide Area Application Services SMART-SSL Accelerator
An unauthenticated remote attacker can cause a denial of service in Cisco WAAS by sending crafted SSL/TLS traffic, disrupting WAN optimization.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2017-6628?
CVE-2017-6628 is a medium-severity denial of service vulnerability in Cisco Wide Area Application Services SMART-SSL Accelerator, published on 3 May 2017. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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.
Which versions are affected by CVE-2017-6628?
It affects 1 product.
Products include Cisco Wide Area Application Services.
How do I fix CVE-2017-6628?
No fix has been published for CVE-2017-6628 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2017-6628 being exploited?
There is no known exploitation of CVE-2017-6628 in the wild and no public exploit code.
Other vulnerabilities in Cisco Wide Area Application Services SMART-SSL Accelerator
Sources
Also known as GHSA-cx3x-jr7v-gvm8.