#VU48795 Improper access control in containerd - CVE-2020-15257
Published: December 1, 2020 / Updated: January 18, 2021
Vulnerability identifier: #VU48795
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:P/U:Green
CVE-ID: CVE-2020-15257
CWE-ID: CWE-284
Exploitation vector: Local access
Exploit availability:
Public exploit is available
Vulnerable software:
containerd
containerd
Software vendor:
containerd
containerd
Description
The vulnerability allows a remote attacker to gain unauthorized access to otherwise restricted functionality.
The vulnerability exists due to improper access restrictions. Access controls for the shim’s API socket verified that the connecting process had an effective UID of 0, but did not otherwise restrict access to the abstract Unix domain socket. This would allow malicious containers running in the same network namespace as the shim, with an effective UID of 0 but otherwise reduced privileges, to cause new processes to be run with elevated privileges.
Remediation
Install updates from vendor's website.