Kubernetes up to 1.15/1.16.12/1.17.8/1.18.6 kube-apiserver Request redirect

Summaryinfo

A vulnerability categorized as critical has been discovered in Kubernetes up to 1.15/1.16.12/1.17.8/1.18.6. This issue affects some unknown processing of the component kube-apiserver. Executing a manipulation as part of Request can lead to redirect. This vulnerability is handled as CVE-2020-8559. The attack can be executed remotely. There is not any exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Kubernetes up to 1.15/1.16.12/1.17.8/1.18.6 (Virtualization Software). It has been declared as problematic. This vulnerability affects an unknown functionality of the component kube-apiserver. The manipulation as part of a Request leads to a redirect vulnerability. The CWE definition for the vulnerability is CWE-601. A web application accepts a user-controlled input that specifies a link to an external site, and uses that link in a Redirect. This simplifies phishing attacks. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

The Kubernetes kube-apiserver in versions v1.6-v1.15, and versions prior to v1.16.13, v1.17.9 and v1.18.7 are vulnerable to an unvalidated redirect on proxied upgrade requests that could allow an attacker to escalate privileges from a node compromise to a full cluster compromise.

The weakness was released 07/22/2020 (GitHub Repository). The advisory is available at github.com. This vulnerability was named CVE-2020-8559 since 02/03/2020. The exploitation appears to be difficult. The attack can be initiated remotely. The exploitation needs additional levels of successful authentication. Successful exploitation requires user interaction by the victim. The technical details are unknown and an exploit is not available. This vulnerability is assigned to T1204.001 by the MITRE ATT&CK project.

Upgrading to version 1.16.13, 1.17.9 or 1.18.7 eliminates this vulnerability.

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Productinfo

Type

• Virtualization Software

Name

• Kubernetes

Version

• 1.0
• 1.1
• 1.2
• 1.3
• 1.4
• 1.5
• 1.6
• 1.7
• 1.8
• 1.9
• 1.10
• 1.11
• 1.12
• 1.13
• 1.14
• 1.15
• 1.16.0
• 1.16.1
• 1.16.2
• 1.16.3
• 1.16.4
• 1.16.5
• 1.16.6
• 1.16.7
• 1.16.8
• 1.16.9
• 1.16.10
• 1.16.11
• 1.16.12
• 1.17.0
• 1.17.1
• 1.17.2
• 1.17.3
• 1.17.4
• 1.17.5
• 1.17.6
• 1.17.7
• 1.17.8
• 1.18.0
• 1.18.1
• 1.18.2
• 1.18.3
• 1.18.4
• 1.18.5
• 1.18.6

License

• open-source

Website

• Product: https://github.com/kubernetes/kubernetes/

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