CVE-2020-8555

Kubernetes kube-controller-manager SSRF

Severity Score

6.3

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

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).

El Kubernetes kube-controller-manager en las versiones v1.0-1.14, versiones anteriores a v1.15.12, v1.16.9, v1.17.5 y v1.18.0, son vulnerables a un ataque de tipo Server Side Request Forgery (SSRF) que permite que determinados usuarios autorizados pierdan hasta 500 bytes de información arbitraria de endpoints desprotegidos dentro de la red host del maestro (tales como los servicios link-local o loopback)

A server side request forgery (SSRF) flaw was found in Kubernetes. The kube-controller-manager allows authorized users with the ability to create StorageClasses or certain Volume types to leak up to 500 bytes of arbitrary information from the master's host network. This can include secrets from the kube-apiserver through the unauthenticated localhost port (if enabled).

*Credits: Brice Augras from Groupe-Asten and Christophe Hauquiert from Nokia

Attack Vector

Network

Attack Complexity

High

Privileges Required

Low

User Interaction

None

Scope

Changed

Confidentiality

High

Integrity

None

Availability

None

Attack Vector

Network

Attack Complexity

Medium

Authentication

Single

Confidentiality

Partial

Integrity

None

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2020-02-03 CVE Reserved
2020-06-04 CVE Published
2024-09-16 CVE Updated
2024-09-28 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-200: Exposure of Sensitive Information to an Unauthorized Actor
CWE-918: Server-Side Request Forgery (SSRF)

CAPEC

References (8)

URL	Tag	Source
http://www.openwall.com/lists/oss-security/2020/06/01/4	Mailing List
http://www.openwall.com/lists/oss-security/2021/05/04/8	Mailing List
https://github.com/kubernetes/kubernetes/issues/91542	Third Party Advisory
https://groups.google.com/d/topic/kubernetes-security-announce/kEK27tqqs30/discussion	Mailing List
https://security.netapp.com/advisory/ntap-20200724-0005	Third Party Advisory

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3SOCLOPTSYABTE4CLTSPDIFE6ZZZR4LX	2023-11-07
https://access.redhat.com/security/cve/CVE-2020-8555	2020-07-01
https://bugzilla.redhat.com/show_bug.cgi?id=1821583	2020-07-01

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Kubernetes Search vendor "Kubernetes"		Kubernetes Search vendor "Kubernetes" for product "Kubernetes"				< 1.15.11 Search vendor "Kubernetes" for product "Kubernetes" and version " < 1.15.11"		-		Affected
Kubernetes Search vendor "Kubernetes"		Kubernetes Search vendor "Kubernetes" for product "Kubernetes"				>= 1.16.0 < 1.16.9 Search vendor "Kubernetes" for product "Kubernetes" and version " >= 1.16.0 < 1.16.9"		-		Affected
Kubernetes Search vendor "Kubernetes"		Kubernetes Search vendor "Kubernetes" for product "Kubernetes"				>= 1.17.0 < 1.17.5 Search vendor "Kubernetes" for product "Kubernetes" and version " >= 1.17.0 < 1.17.5"		-		Affected
Kubernetes Search vendor "Kubernetes"		Kubernetes Search vendor "Kubernetes" for product "Kubernetes"				1.18.0 Search vendor "Kubernetes" for product "Kubernetes" and version "1.18.0"		-		Affected
Fedoraproject Search vendor "Fedoraproject"		Fedora Search vendor "Fedoraproject" for product "Fedora"				32 Search vendor "Fedoraproject" for product "Fedora" and version "32"		-		Affected