CVE-2017-6653 Denial of service in Cisco Identity Services Engine

High 7.5 Published 22 May 2017 Updated 5 Aug 2024

Unauthenticated remote attackers can cause a denial of service on Cisco ISE GUI by sending high-rate TCP connections due to insufficient rate limiting.

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-2017-6653?

CVE-2017-6653 is a high-severity denial of service vulnerability in Cisco Identity Services Engine, published on 22 May 2017. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

A vulnerability in the TCP throttling process for the GUI of the Cisco Identity Services Engine (ISE) 2.1(0.474) could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device where the ISE GUI may fail to respond to new or established connection requests. The vulnerability is due to insufficient TCP rate limiting protection on the GUI. An attacker could exploit this vulnerability by sending the affected device a high rate of TCP connections to the GUI. An exploit could allow the attacker to cause the GUI to stop responding while the high rate of connections is in progress. Cisco Bug IDs: CSCvc81803.

Weakness: CWE-770, CWE-399

Which versions are affected by CVE-2017-6653?

It affects 1 product.

Products include Cisco Identity Services Engine.

How do I fix CVE-2017-6653?

No fix has been published for CVE-2017-6653 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-2017-6653 being exploited?

There is no known exploitation of CVE-2017-6653 in the wild and no public exploit code.

All Cisco Identity Services Engine vulnerabilities

Sources

Also known as GHSA-px76-ghcx-4p3m.