Vulnerabilities > CVE-2021-25737 - Open Redirect vulnerability in Kubernetes
Attack vector
NETWORK Attack complexity
LOW Privileges required
HIGH Confidentiality impact
LOW Integrity impact
LOW Availability impact
NONE Summary
A security issue was discovered in Kubernetes where a user may be able to redirect pod traffic to private networks on a Node. Kubernetes already prevents creation of Endpoint IPs in the localhost or link-local range, but the same validation was not performed on EndpointSlice IPs.
Vulnerable Configurations
Common Weakness Enumeration (CWE)
Common Attack Pattern Enumeration and Classification (CAPEC)
- Fake the Source of Data An adversary provides data under a falsified identity. The purpose of using the falsified identity may be to prevent traceability of the provided data or it might be an attempt by the adversary to assume the rights granted to another identity. One of the simplest forms of this attack would be the creation of an email message with a modified "From" field in order to appear that the message was sent from someone other than the actual sender. Results of the attack vary depending on the details of the attack, but common results include privilege escalation, obfuscation of other attacks, and data corruption/manipulation.
References
- https://github.com/kubernetes/kubernetes/issues/102106
- https://github.com/kubernetes/kubernetes/issues/102106
- https://groups.google.com/g/kubernetes-security-announce/c/xAiN3924thY
- https://groups.google.com/g/kubernetes-security-announce/c/xAiN3924thY
- https://security.netapp.com/advisory/ntap-20211004-0004/
- https://security.netapp.com/advisory/ntap-20211004-0004/