Vulnerability Monitor

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CVE-2020-8555

The Kubernetes kube-controller-manager in versions v1.0-1.14, versions prior to v1.15.12, v1.16.9, v1.17.5, and version v1.18.0 are vulnerable to a Server Side Request Forgery (SSRF) that allows certain authorized users to leak up to 500 bytes of arbitrary information from unprotected endpoints within the master's host network (such as link-local or loopback services).

Security Impact Summary

This vulnerability carries a MEDIUM severity rating with a CVSS v3.1 score of 6.3, indicating it can be exploited remotely over the network but requires specific conditions to be met without requiring user interaction requiring only low-level privileges . The vulnerability impacts confidentiality (data exposure), for affected systems. Impacting 2 products from kubernetes, from fedoraproject organizations running these solutions should prioritize assessment and patching.

Historical Context

Reported in 2020, this vulnerability emerged during an era marked by increased sophistication in supply chain attacks, cloud infrastructure vulnerabilities, and software-as-a-service (SaaS) security challenges. Security practices during this period emphasized zero-trust architectures, container security, and API protection.

Published

2020-06-05T17:15:11.640

Last Modified

2024-11-21T05:39:01.533

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 6.3 (MEDIUM)

CVSSv2 Vector

AV:N/AC:M/Au:S/C:P/I:N/A:N

Access Vector: NETWORK
Access Complexity: MEDIUM
Authentication: SINGLE
Confidentiality Impact: PARTIAL
Integrity Impact: NONE
Availability Impact: NONE

Exploitability Score

6.8

Impact Score

2.9

Weaknesses

Type: Secondary
CWE-918
Type: Primary
CWE-918

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	kubernetes	kubernetes	< 1.15.11	Yes
Application	kubernetes	kubernetes	< 1.16.9	Yes
Application	kubernetes	kubernetes	< 1.17.5	Yes
Application	kubernetes	kubernetes	1.18.0	Yes
Operating System	fedoraproject	fedora	32	Yes

References

http://www.openwall.com/lists/oss-security/2020/06/01/4 Mailing List, Third Party Advisory ([email protected])
http://www.openwall.com/lists/oss-security/2021/05/04/8 Mailing List, Third Party Advisory ([email protected])
https://github.com/kubernetes/kubernetes/issues/91542 Third Party Advisory ([email protected])
https://groups.google.com/d/topic/kubernetes-security-announce/kEK27tqqs30/discussion Mailing List, Third Party Advisory ([email protected])
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3SOCLOPTSYABTE4CLTSPDIFE6ZZZR4LX/ ([email protected])
https://security.netapp.com/advisory/ntap-20200724-0005/ Third Party Advisory ([email protected])
http://www.openwall.com/lists/oss-security/2020/06/01/4 Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://www.openwall.com/lists/oss-security/2021/05/04/8 Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/kubernetes/kubernetes/issues/91542 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://groups.google.com/d/topic/kubernetes-security-announce/kEK27tqqs30/discussion Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3SOCLOPTSYABTE4CLTSPDIFE6ZZZR4LX/ (af854a3a-2127-422b-91ae-364da2661108)
https://security.netapp.com/advisory/ntap-20200724-0005/ Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For kubernetes's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.