CVE-2017-1000095 : What You Need to Know
Learn about CVE-2017-1000095, a Jenkins vulnerability allowing bypassing access restrictions via whitelist manipulation. Find mitigation steps and update recommendations here.
This CVE involves a vulnerability in Jenkins that allowed bypassing access restrictions by manipulating the whitelist. Learn about the impact, technical details, and mitigation steps.
Understanding CVE-2017-1000095
This CVE highlights a flaw in Jenkins' whitelist configuration that could be exploited to circumvent access restrictions and access private data.
What is CVE-2017-1000095?
The initial whitelist in Jenkins contained unsafe entries that could be used to bypass access restrictions imposed by the script sandbox, potentially leading to unauthorized access to private data.
The Impact of CVE-2017-1000095
The vulnerability allowed attackers to manipulate the whitelist to access private data and bypass security restrictions, posing a risk of unauthorized data exposure and potential system compromise.
Technical Details of CVE-2017-1000095
This section provides detailed technical information about the vulnerability.
Vulnerability Description
The default whitelist in Jenkins included entries like DefaultGroovyMethods.putAt(Object, String, Object) and DefaultGroovyMethods.getAt(Object, String), enabling attackers to bypass access restrictions. Additionally, certain whitelist entries allowed access to private data, such as groovy.json.JsonOutput.toJson(Closure) and groovy.json.JsonOutput.toJson(Object).
Affected Systems and Versions
- Affected Product: Not applicable
- Affected Vendor: Not applicable
- Affected Versions: Not applicable
Exploitation Mechanism
Attackers could exploit the vulnerability by manipulating the whitelist entries to use alternative methods that bypassed access restrictions and accessed private data.
Mitigation and Prevention
Protect your systems from CVE-2017-1000095 with these mitigation strategies.
Immediate Steps to Take
- Update Jenkins to the latest version to patch the vulnerability.
- Review and adjust the whitelist configuration to remove unsafe entries.
Long-Term Security Practices
- Regularly review and update Jenkins configurations to ensure security.
- Educate users on secure coding practices to prevent similar vulnerabilities.
Patching and Updates
Ensure timely patching and updates for Jenkins to address security vulnerabilities and protect against potential exploits.