Insecure storage of credentials in Kubernetes



| Updated: 2019-12-17
Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2019-11250
CWE-ID CWE-256
Exploitation vector Local
Public exploit N/A
Vulnerable software
 Kubernetes
Server applications / Frameworks for developing and running applications

Vendor Kubernetes

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Unprotected storage of credentials

EUVDB-ID: #VU23636

Risk: Low

CVSSv4.0: 1.1 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2019-11250

CWE-ID: CWE-256 - Unprotected Storage of Credentials

Exploit availability: No

Description

The vulnerability allows a local user to gain access to other users' credentials.

The vulnerability exists due Kubernetes client-go library logs request headers at verbosity levels of 7 or higher. This can disclose credentials to unauthorized users via logs or command output. Kubernetes components (such as kube-apiserver) prior to v1.16.0, which make use of basic or bearer token authentication, and run at high verbosity levels, are affected. A local user can view contents of the configuration file and gain access to passwords for 3rd party integration.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Kubernetes: 1.13.0 rc1 - 1.15.7

CPE2.3 External links

https://github.com/kubernetes/kubernetes/issues/81114
https://security.netapp.com/advisory/ntap-20190919-0003/
https://github.com/kubernetes/kubernetes/pull/81330/commits/010d8382642119c73cb2405286b347c08d704287#diff-f5423923c5f61f08517f3eb0014e48ee


Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.



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