CVE-2020-8555 in Kubernetes and Fedora Project Products
Published on June 5, 2020
Kubernetes kube-controller-manager SSRF
Vulnerability Analysis
CVE-2020-8555 can be exploited with network access, and requires small amount of 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 have a high impact on confidentiality, with no impact on integrity and availability.
Weakness Type
What is a SSRF Vulnerability?
The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination. By providing URLs to unexpected hosts or ports, attackers can make it appear that the server is sending the request, possibly bypassing access controls such as firewalls that prevent the attackers from accessing the URLs directly. The server can be used as a proxy to conduct port scanning of hosts in internal networks, use other URLs such as that can access documents on the system (using file://), or use other protocols such as gopher:// or tftp://, which may provide greater control over the contents of requests.
CVE-2020-8555 has been classified to as a SSRF vulnerability or weakness.
Products Associated with CVE-2020-8555
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Affected Versions
Kubernetes:- Version 1.18.0 is affected.
- Version 1.1 is affected.
- Version 1.2 is affected.
- Version 1.3 is affected.
- Version 1.4 is affected.
- Version 1.5 is affected.
- 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 and below 1.15.12 is affected.
- Version 1.16 and below 1.16.9 is affected.
- Version 1.17 and below 1.17.5 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.