Permissions, Privileges, and Access Controls in Rancher - CVE-2021-31999
Published: July 23, 2021
Vulnerability identifier: #VU55281
CSH Severity: High
CVSS v4: 9.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2021-31999
CWE-ID: CWE-264
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to escalate privileges on the system.
The vulnerability exists due to a reliance on untrusted inputs in a security decision issue. A remote attacker can forge the "Impersonate-User" or "Impersonate-Group" headers and gain elevated privileges on the target system.
Affected software
Rancher
How to mitigate CVE-2021-31999
Install updates from vendor's website.
Rancher - addressed in versions 2.4.16, 2.5.9