CVE-2020-35459 : Exploit Details and Defense Strategies
Discover the impact of CVE-2020-35459, a vulnerability in ClusterLabs crmsh through 4.2.1 allowing local attackers to execute commands via shell code injection for privilege escalation. Learn how to mitigate and prevent this security risk.
An issue was discovered in ClusterLabs crmsh through 4.2.1 where local attackers could execute commands via shell code injection to the crm history commandline, potentially allowing privilege escalation.
Understanding CVE-2020-35459
What is CVE-2020-35459?
CVE-2020-35459 is a vulnerability found in ClusterLabs crmsh through version 4.2.1 that allows local attackers to execute commands through shell code injection.
The Impact of CVE-2020-35459
This vulnerability could lead to privilege escalation, enabling attackers to gain higher access levels than intended.
Technical Details of CVE-2020-35459
Vulnerability Description
The issue in crmsh allows local attackers to execute commands through shell code injection to the crm history commandline.
Affected Systems and Versions
- Product: n/a
- Vendor: n/a
- Versions affected: All versions up to 4.2.1
Exploitation Mechanism
Attackers can exploit this vulnerability by calling "crm history" when "crm" is run, allowing them to inject shell code and execute arbitrary commands.
Mitigation and Prevention
Immediate Steps to Take
- Update crmsh to the latest version to patch the vulnerability.
- Restrict access to vulnerable systems to trusted users only.
Long-Term Security Practices
- Regularly monitor and audit system logs for any suspicious activities.
- Implement the principle of least privilege to limit user access rights.
Patching and Updates
- Apply security patches promptly to all affected systems to prevent exploitation.