CVE-2018-0455 Cisco Firepower System Software Detection Engine Denial of Service Vulnerability
Remote attackers can cause memory exhaustion and traffic forwarding failure in Cisco Firepower devices by sending malicious SMBv2 or SMBv3 traffic.
- 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-2018-0455?
CVE-2018-0455 is a high-severity denial of service vulnerability in Cisco FireSIGHT System Software, published on 5 Oct 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A vulnerability in the Server Message Block Version 2 (SMBv2) and Version 3 (SMBv3) protocol implementation for the Cisco Firepower System Software could allow an unauthenticated, remote attacker to cause the device to run low on system memory, possibly preventing the device from forwarding traffic. It is also possible that a manual reload of the device may be required to clear the condition. The vulnerability is due to incorrect SMB header validation. An attacker could exploit this vulnerability by sending a custom SMB file transfer through the targeted device. A successful exploit could cause the device to consume an excessive amount of system memory and prevent the SNORT process from forwarding network traffic. This vulnerability can be exploited using either IPv4 or IPv6 in combination with SMBv2 or SMBv3 network traffic.
Weakness: CWE-19
Which versions are affected by CVE-2018-0455?
It affects 1 product.
Products include Cisco Firepower System Software.
How do I fix CVE-2018-0455?
No fix has been published for CVE-2018-0455 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-2018-0455 being exploited?
There is no known exploitation of CVE-2018-0455 in the wild and no public exploit code.
Other vulnerabilities in Cisco FireSIGHT System Software
Sources
Also known as GHSA-8cr6-pqj8-xf85.