CVE-2017-6641 Denial of service in Cisco Remote Expert Manager
Unauthenticated remote attackers can cause denial of service by flooding TCP packets, exhausting resources and disabling ports on Cisco Remote Expert Manager.
- 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-2017-6641?
CVE-2017-6641 is a high-severity denial of service vulnerability in Cisco Remote Expert Manager, 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 connection handling functionality of Cisco Remote Expert Manager Software 11.0.0 could allow an unauthenticated, remote attacker to disable TCP ports and cause a denial of service (DoS) condition on an affected system. The vulnerability is due to a lack of rate-limiting functionality in the TCP Listen application of the affected software. An attacker could exploit this vulnerability by sending a crafted TCP traffic stream in which specific types of TCP packets are flooded to an affected device, for example a TCP packet stream in which the TCP FIN bit is set in all the TCP packets. A successful exploit could allow the attacker to cause certain TCP listening ports on the affected system to stop accepting incoming connections for a period of time or until the affected device is restarted, resulting in a DoS condition. In addition, system resources, such as CPU and memory, could be exhausted during the attack. Cisco Bug IDs: CSCva29806.
Which versions are affected by CVE-2017-6641?
It affects 1 product.
Products include Cisco Remote Expert Manager.
How do I fix CVE-2017-6641?
No fix has been published for CVE-2017-6641 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-2017-6641 being exploited?
There is no known exploitation of CVE-2017-6641 in the wild and no public exploit code.
Other vulnerabilities in Cisco Remote Expert Manager
- CVE-2017-6642 Information disclosure in Cisco Remote Expert Manager
- CVE-2017-6643 Information disclosure in Cisco Remote Expert Manager
- CVE-2017-6644 Information disclosure in Cisco Remote Expert Manager
- CVE-2017-6645 Information disclosure in Cisco Remote Expert Manager
- CVE-2017-6646 Information disclosure in Cisco Remote Expert Manager
Sources
Also known as GHSA-p3m3-vvvv-g35w.