#VU71689 Race condition in Utilities for Amazon Elastic File System (EFS) - CVE-2022-46174
Published: January 31, 2023
Vulnerability identifier: #VU71689
Vulnerability risk: Low
CVSSv4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2022-46174
CWE-ID: CWE-362
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerable software:
Utilities for Amazon Elastic File System (EFS)
Utilities for Amazon Elastic File System (EFS)
Software vendor:
Amazon Web Services
Amazon Web Services
Description
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to a race condition within the Amazon EFS mount helper when using TLS to mount file systems. The mount helper allocates a local port for stunnel to receive NFS connections prior to applying the TLS tunnel. As a result, concurrent mount operations can allocate the same local port, leading to either failed mount operations or an inappropriate mapping from an EFS customer’s local mount points to that customer’s EFS file systems.
Remediation
Install updates from vendor's website.