CVE-2017-5872 : Vulnerability Insights and Analysis
Learn about CVE-2017-5872 affecting Unisys ClearPath MCP systems with TCP-IP-SW versions 57.1 to 59.172. Find out how to prevent network disruption and denial of service attacks.
Unisys ClearPath MCP systems with TCP-IP-SW versions 57.1 prior to 57.152, 58.1 prior to 58.142, or 59.1 prior to 59.172 may experience a network connectivity disruption due to a vulnerability in the TCP/IP networking module.
Understanding CVE-2017-5872
This CVE involves a denial of service vulnerability that can be exploited by remote attackers.
What is CVE-2017-5872?
The vulnerability in Unisys ClearPath MCP systems allows attackers to trigger a denial of service by sending a client hello with a signature_algorithms extension that exceeds defined limits.
The Impact of CVE-2017-5872
Exploiting this vulnerability can lead to a network connectivity disruption on affected systems, potentially causing a denial of service.
Technical Details of CVE-2017-5872
Unpacking the technical aspects of this CVE.
Vulnerability Description
- Attackers exploit a vulnerability in the TCP/IP networking module of Unisys ClearPath MCP systems with specific versions to trigger a denial of service by causing a full memory dump.
Affected Systems and Versions
- Unisys ClearPath MCP systems with TCP-IP-SW versions 57.1 to 57.152, 58.1 to 58.142, or 59.1 to 59.172 are vulnerable.
Exploitation Mechanism
- Attackers send a client hello with a signature_algorithms extension that surpasses defined limits in RFC 5246, leading to a full memory dump and denial of service.
Mitigation and Prevention
Exploring steps to mitigate and prevent the CVE-2017-5872 vulnerability.
Immediate Steps to Take
- Disable TLS 1.2 services on affected Unisys ClearPath MCP systems to prevent exploitation.
- Monitor network traffic for any suspicious activity that could indicate an attack.
Long-Term Security Practices
- Regularly update and patch Unisys ClearPath MCP systems to address known vulnerabilities.
- Implement network segmentation and access controls to limit the impact of potential attacks.
Patching and Updates
- Apply patches provided by Unisys for TCP-IP-SW versions 57.152, 58.142, and 59.172 to mitigate the vulnerability.