CVE-2018-0455 : What You Need to Know
Learn about CVE-2018-0455, a Cisco Firepower System Software vulnerability allowing attackers to deplete system memory via SMBv2 and SMBv3, potentially disrupting traffic forwarding. Find mitigation steps and patch information.
A vulnerability in the Cisco Firepower System Software's implementation of SMBv2 and SMBv3 protocols could allow an attacker to deplete system memory, potentially disrupting traffic forwarding.
Understanding CVE-2018-0455
What is CVE-2018-0455?
A flaw in Cisco Firepower System Software allows unauthorized attackers to exhaust system memory by exploiting SMBv2 and SMBv3 protocols, leading to traffic disruptions.
The Impact of CVE-2018-0455
The vulnerability could result in excessive consumption of system memory, hindering the SNORT process responsible for network traffic forwarding.
Technical Details of CVE-2018-0455
Vulnerability Description
- Inaccurate validation of SMB headers in Cisco Firepower System Software
- Attacker can exploit by sending a specially crafted SMB file transfer
Affected Systems and Versions
- Product: Cisco FireSIGHT System Software
- Vendor: Cisco
- Affected Version: n/a
Exploitation Mechanism
- Attacker transmits a malicious SMB file transfer through the device
- Vulnerable to both IPv4 and IPv6 with SMBv2 or SMBv3 network traffic
Mitigation and Prevention
Immediate Steps to Take
- Apply vendor-provided patches and updates
- Monitor network traffic for any suspicious activity
Long-Term Security Practices
- Regularly update and patch all software and firmware
- Implement network segmentation and access controls
Patching and Updates
- Cisco has released patches to address this vulnerability