CVE-2020-12690 : What You Need to Know
Learn about CVE-2020-12690, a vulnerability in OpenStack Keystone allowing unauthorized access due to mishandling of roles in OAuth1 access tokens. Find out how to mitigate and prevent this security issue.
An issue was discovered in OpenStack Keystone before 15.0.1, and 16.0.0, where the list of roles provided for an OAuth1 access token is silently ignored, potentially leading to unintended escalated access.
Understanding CVE-2020-12690
This CVE highlights a vulnerability in OpenStack Keystone that could result in unauthorized access due to role assignment issues.
What is CVE-2020-12690?
CVE-2020-12690 is a security vulnerability in OpenStack Keystone that allows for the unintended escalation of access privileges due to the mishandling of roles in OAuth1 access tokens.
The Impact of CVE-2020-12690
The vulnerability could lead to unauthorized users gaining more role assignments than intended, potentially resulting in escalated access privileges within the Keystone system.
Technical Details of CVE-2020-12690
This section provides more in-depth technical information about the CVE.
Vulnerability Description
The issue arises from OpenStack Keystone versions before 15.0.1 and 16.0.0, where the roles specified in an OAuth1 access token are not properly enforced, leading to excessive role assignments in the resulting Keystone token.
Affected Systems and Versions
- OpenStack Keystone versions before 15.0.1 and 16.0.0
Exploitation Mechanism
- Attackers can exploit this vulnerability by using an OAuth1 access token to request a Keystone token, which may contain more role assignments than intended, potentially granting unauthorized access.
Mitigation and Prevention
Protecting systems from CVE-2020-12690 requires immediate actions and long-term security practices.
Immediate Steps to Take
- Upgrade OpenStack Keystone to version 15.0.1 or higher to mitigate the vulnerability.
- Monitor and review role assignments in Keystone tokens to detect any unauthorized access.
Long-Term Security Practices
- Regularly review and update access control policies within the Keystone system.
- Conduct security audits to identify and address any role assignment discrepancies.
Patching and Updates
- Apply security patches provided by OpenStack to address the vulnerability and prevent unauthorized access.