UNIX symbolic link following in Kubernetes - CVE-2019-11251
Published: October 31, 2019
Vulnerability identifier: #VU22431
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2019-11251
CWE-ID: CWE-61
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Kubernetes
Affected software:
Kubernetes
Kubernetes
Detailed vulnerability description
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a symlink following issue in kubectl cp. A local user can create two symbolic links and overwrite files on the system with privileges of the application.
Successful exploitation of this vulnerability may result in privilege escalation.
How to mitigate CVE-2019-11251
Install updates from vendor's website.