CVE-2020-8559 is a vulnerability in Kubernetes
Published on July 22, 2020
Privilege escalation from compromised node to cluster
The Kubernetes kube-apiserver in versions v1.6-v1.15, and versions prior to v1.16.13, v1.17.9 and v1.18.6 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.
Vulnerability Analysis
CVE-2020-8559 can be exploited with network access, requires user interaction and user privileges. This vulnerability is consided to have a high level of attack complexity. The potential impact of an exploit of this vulnerability is considered to be very high.
Weakness Type
What is an Open Redirect Vulnerability?
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. An http parameter may contain a URL value and could cause the web application to redirect the request to the specified URL. By modifying the URL value to a malicious site, an attacker may successfully launch a phishing scam and steal user credentials. Because the server name in the modified link is identical to the original site, phishing attempts have a more trustworthy appearance.
CVE-2020-8559 has been classified to as an Open Redirect vulnerability or weakness.
Products Associated with CVE-2020-8559
Want to know whenever a new CVE is published for Kubernetes? stack.watch will email you.
Affected Versions
Kubernetes:- Version 1.6 is affected.
- Version 1.7 is affected.
- Version 1.8 is affected.
- Version 1.9 is affected.
- Version 1.10 is affected.
- Version 1.11 is affected.
- Version 1.12 is affected.
- Version 1.13 is affected.
- Version 1.14 is affected.
- Version 1.15 is affected.
- Version 1.16, <= 1.16.12 is affected.
- Version 1.17, <= 1.17.8 is affected.
- Version 1.18, <= 1.18.5 is affected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.