CVE-2018-1256 Explained : Impact and Mitigation
Learn about CVE-2018-1256, a vulnerability in Spring Cloud SSO Connector version 2.1.2 that enables unauthorized access to unconnected resource servers. Find mitigation steps and prevention measures here.
CVE-2018-1256 pertains to a vulnerability in the Spring Cloud SSO Connector version 2.1.2, affecting systems where issuer validation is disabled in resource servers not linked to the SSO service.
Understanding CVE-2018-1256
This CVE involves an improper access control issue in the Spring Cloud SSO Connector, potentially enabling unauthorized access to unconnected resource servers.
What is CVE-2018-1256?
The vulnerability in version 2.1.2 of Spring Cloud SSO Connector allows attackers to authenticate on unconnected resource servers using tokens from a different service plan in PCF deployments.
The Impact of CVE-2018-1256
The vulnerability poses a risk of unauthorized access to resource servers not bound to the SSO service, compromising the security of the affected systems.
Technical Details of CVE-2018-1256
This section provides detailed technical insights into the CVE.
Vulnerability Description
The regression in Spring Cloud SSO Connector 2.1.2 disables issuer validation in resource servers not connected to the SSO service, enabling remote attackers to authenticate on unconnected servers using tokens from another service plan.
Affected Systems and Versions
- Product: Spring Cloud SSO Connector
- Vendor: Pivotal
- Versions Affected: 2.1.2
Exploitation Mechanism
Attackers can exploit this vulnerability by leveraging tokens from a different service plan to authenticate on unconnected resource servers in PCF deployments.
Mitigation and Prevention
Protecting systems from CVE-2018-1256 requires immediate actions and long-term security practices.
Immediate Steps to Take
- Upgrade to a patched version of Spring Cloud SSO Connector that addresses the vulnerability.
- Implement network segmentation to restrict unauthorized access.
Long-Term Security Practices
- Regularly monitor and audit access controls within the environment.
- Conduct security training to educate users on best practices for handling authentication tokens.
Patching and Updates
Ensure timely application of security patches and updates to mitigate the risk of exploitation.