CVE-2017-1002102 : Vulnerability Insights and Analysis
Learn about CVE-2017-1002102 affecting Kubernetes containers, allowing unauthorized deletion of files. Discover impact, affected versions, and mitigation steps.
Containers utilizing a secret, configMap, projected, or downwardAPI volume in Kubernetes versions 1.3.x, 1.4.x, 1.5.x, 1.6.x, and versions prior to 1.7.14, 1.8.9, and 1.9.4, have the potential to delete arbitrary files or directories from the nodes on which they are actively operating.
Understanding CVE-2017-1002102
This CVE affects Kubernetes versions and poses a risk of unauthorized deletion of files or directories within the nodes.
What is CVE-2017-1002102?
This vulnerability allows containers in specific Kubernetes versions to delete files or directories on the nodes they operate on, potentially leading to data loss or system instability.
The Impact of CVE-2017-1002102
The vulnerability has a CVSS base score of 7.1 (High severity) and can result in the deletion of arbitrary files or directories, impacting the availability of the affected systems.
Technical Details of CVE-2017-1002102
Containers using certain volumes in Kubernetes are susceptible to triggering file or directory deletions.
Vulnerability Description
The flaw arises from insecure handling of symbolic links, enabling containers to delete files or directories on the nodes.
Affected Systems and Versions
- Kubernetes versions 1.3.x, 1.4.x, 1.5.x, 1.6.x
- Versions prior to 1.7.14, 1.8.9, and 1.9.4
Exploitation Mechanism
The vulnerability allows containers to exploit certain volume types to trigger the deletion of files or directories on the nodes.
Mitigation and Prevention
Immediate action and long-term security practices are crucial to mitigate the risks posed by CVE-2017-1002102.
Immediate Steps to Take
- Update Kubernetes to versions beyond the vulnerable ones specified.
- Monitor file system changes and access permissions within containers.
- Implement strict access controls and least privilege principles.
Long-Term Security Practices
- Regularly audit and review container configurations and permissions.
- Educate personnel on secure container practices and potential risks.
Patching and Updates
- Apply patches provided by Kubernetes to address the vulnerability and prevent unauthorized file deletions.