CVE-2018-0358 : Security Advisory and Response
Learn about CVE-2018-0358, a vulnerability in Cisco TelePresence Video Communication Server (VCS) Expressway that could lead to a DoS attack. Find mitigation steps and patching details here.
Cisco TelePresence Video Communication Server (VCS) Expressway is vulnerable to a file descriptor handling weakness that could lead to a denial of service (DoS) attack.
Understanding CVE-2018-0358
This CVE identifies a vulnerability in Cisco TelePresence Video Communication Server (VCS) Expressway that could be exploited by an unauthorized attacker to trigger a DoS situation.
What is CVE-2018-0358?
The vulnerability in Cisco TelePresence VCS Expressway stems from the depletion of file descriptors during the processing of a large volume of network traffic. Attackers could exploit this weakness to initiate a DoS attack by establishing multiple simultaneous TCP connections, causing a restart in a specific process and disrupting services temporarily.
The Impact of CVE-2018-0358
The vulnerability could result in a temporary interruption of services due to a DoS attack initiated by exploiting the file descriptor handling weakness in Cisco TelePresence VCS Expressway.
Technical Details of CVE-2018-0358
Vulnerability Description
- Weakness in file descriptor handling of Cisco TelePresence VCS Expressway
- Allows unauthenticated remote attackers to trigger a DoS condition
Affected Systems and Versions
- Product: Cisco TelePresence Video Communication Server unknown
- Version: Cisco TelePresence Video Communication Server unknown
Exploitation Mechanism
- Attacker exhausts file descriptors processing high traffic volume
- Exploits by establishing numerous concurrent TCP connections
- Results in a restart of a specific process and service disruption
Mitigation and Prevention
Immediate Steps to Take
- Apply vendor-provided patches and updates promptly
- Monitor network traffic for unusual patterns
- Implement network segmentation to limit attack surface
Long-Term Security Practices
- Regularly update and patch all software and systems
- Conduct security assessments and audits periodically
Patching and Updates
- Refer to Cisco's security advisory for specific patch details and instructions