SB2021090123 - Authentication bypass in Kubernetes

CSH
CYBERSECURITY HELP
Sign In REGISTER

Main Vulnerability Database SB2021090123

SB2021090123 - Authentication bypass in Kubernetes

Published: September 1, 2021

Security Bulletin ID SB2021090123
Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Adjecent network
Highest impact Data manipulation

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 security vulnerability.


1) Improper Authentication (CVE-ID: CVE-2021-3636)

The vulnerability allows a remote attacker to bypass authentication process.

The vulnerability exists due to the generated certificate for the in-cluster Service CA, incorrectly included additional certificates. The Service CA is automatically mounted into all pods, allowing them to safely connect to trusted in-cluster services that present certificates signed by the trusted Service CA. The incorrect inclusion of additional CAs in this certificate would allow an attacker that compromises any of the additional CAs to masquerade as a trusted in-cluster service.


Remediation

Install update from vendor's website.

References