CVE-2017-6632 Denial of service in Cisco FirePOWER System Software
Remote attackers can cause denial of service on Cisco FirePOWER devices by flooding crafted TCP packets if SSL policy logging is enabled.
- 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-2017-6632?
CVE-2017-6632 is a high-severity denial of service vulnerability in Cisco Secure Firewall Threat Defense, 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 logging configuration of Secure Sockets Layer (SSL) policies for Cisco FirePOWER System Software 5.3.0 through 6.2.2 could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition due to high consumption of system resources. The vulnerability is due to the logging of certain TCP packets by the affected software. An attacker could exploit this vulnerability by sending a flood of crafted TCP packets to an affected device. A successful exploit could allow the attacker to cause a DoS condition. The success of an exploit is dependent on how an administrator has configured logging for SSL policies for a device. This vulnerability affects Cisco FirePOWER System Software that is configured to log connections by using SSL policy default actions. Cisco Bug IDs: CSCvd07072.
Which versions are affected by CVE-2017-6632?
It affects 2 products.
Products include Cisco Firepower Threat Defense, Cisco Secure Firewall Threat Defense.
How do I fix CVE-2017-6632?
No fix has been published for CVE-2017-6632 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-2017-6632 being exploited?
There is no known exploitation of CVE-2017-6632 in the wild and no public exploit code.
Sources
Also known as GHSA-4rxc-c47v-3rf5.