CVE-2017-6633 Denial of service in Cisco UCS C-Series Rack Servers
Remote attackers can cause denial of service on Cisco UCS C-Series servers by flooding TCP SYN packets 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-2017-6633?
CVE-2017-6633 is a high-severity denial of service vulnerability in Cisco Unified Computing System, 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 of Cisco UCS C-Series Rack Servers 3.0(0.234) could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability is due to insufficient rate-limiting protection. An attacker could exploit this vulnerability by sending a high rate of TCP SYN packets to a specific TCP listening port on an affected device. An exploit could allow the attacker to cause a specific TCP listening port to stop accepting new connections, resulting in a DoS condition. Cisco Bug IDs: CSCva65544.
Weakness: CWE-119
Which versions are affected by CVE-2017-6633?
It affects 1 product.
Products include Cisco Unified Computing System.
How do I fix CVE-2017-6633?
No fix has been published for CVE-2017-6633 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-2017-6633 being exploited?
There is no known exploitation of CVE-2017-6633 in the wild and no public exploit code.
Other vulnerabilities in Cisco Unified Computing System
- CVE-2026-20200 Cisco Integrated Management Controller Argument Injection and Remote Code Execution Vulnerability
- CVE-2026-20094 Cisco Integrated Management Controller Command Injection Vulnerability
- CVE-2018-0430 Cisco Integrated Management Controller Command Injection Vulnerability
- CVE-2018-0431 Cisco Integrated Management Controller Command Injection Vulnerability
- CVE-2012-4078 Auth bypass in n/a
Sources
Also known as GHSA-g9pg-mx97-6ghh.