CVE Vulnerabilities

CVE-2022-22995

Improper Link Resolution Before File Access ('Link Following')

Published: Mar 25, 2022 | Modified: Jan 04, 2024
CVSS 3.x
9.8
CRITICAL
Source:
NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 2.x
7.5 HIGH
AV:N/AC:L/Au:N/C:P/I:P/A:P
RedHat/V2
RedHat/V3
Ubuntu
MEDIUM

The combination of primitives offered by SMB and AFP in their default configuration allows the arbitrary writing of files. By exploiting these combination of primitives, an attacker can execute arbitrary code.

Weakness

The product attempts to access a file based on the filename, but it does not properly prevent that filename from identifying a link or shortcut that resolves to an unintended resource.

Affected Software

Name Vendor Start Version End Version
My_cloud_pr2100_firmware Westerndigital * 5.19.117 (excluding)
Netatalk Ubuntu bionic *
Netatalk Ubuntu esm-apps/focal *
Netatalk Ubuntu esm-apps/jammy *
Netatalk Ubuntu focal *
Netatalk Ubuntu jammy *
Netatalk Ubuntu lunar *
Netatalk Ubuntu mantic *
Netatalk Ubuntu trusty *
Netatalk Ubuntu upstream *
Netatalk Ubuntu xenial *

Potential Mitigations

  • Follow the principle of least privilege when assigning access rights to entities in a software system.
  • Denying access to a file can prevent an attacker from replacing that file with a link to a sensitive file. Ensure good compartmentalization in the system to provide protected areas that can be trusted.

References