CVE Vulnerabilities

CVE-2022-26704

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

Published: May 26, 2022 | Modified: Nov 10, 2022
CVSS 3.x
7.8
HIGH
Source:
NVD
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CVSS 2.x
6.8 MEDIUM
AV:N/AC:M/Au:N/C:P/I:P/A:P
RedHat/V2
RedHat/V3
Ubuntu

A validation issue existed in the handling of symlinks and was addressed with improved validation of symlinks. This issue is fixed in macOS Monterey 12.4. An app may be able to gain elevated privileges.

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
Mac_os_x Apple 10.15 (including) 10.15.7 (excluding)
Mac_os_x Apple 10.15.7 (including) 10.15.7 (including)
Mac_os_x Apple 10.15.7-security_update_2020 (including) 10.15.7-security_update_2020 (including)
Mac_os_x Apple 10.15.7-security_update_2020-001 (including) 10.15.7-security_update_2020-001 (including)
Mac_os_x Apple 10.15.7-security_update_2020-005 (including) 10.15.7-security_update_2020-005 (including)
Mac_os_x Apple 10.15.7-security_update_2020-007 (including) 10.15.7-security_update_2020-007 (including)
Mac_os_x Apple 10.15.7-security_update_2021-001 (including) 10.15.7-security_update_2021-001 (including)
Mac_os_x Apple 10.15.7-security_update_2021-002 (including) 10.15.7-security_update_2021-002 (including)
Mac_os_x Apple 10.15.7-security_update_2021-003 (including) 10.15.7-security_update_2021-003 (including)
Mac_os_x Apple 10.15.7-security_update_2021-004 (including) 10.15.7-security_update_2021-004 (including)
Mac_os_x Apple 10.15.7-security_update_2021-005 (including) 10.15.7-security_update_2021-005 (including)
Mac_os_x Apple 10.15.7-security_update_2021-006 (including) 10.15.7-security_update_2021-006 (including)
Mac_os_x Apple 10.15.7-security_update_2021-007 (including) 10.15.7-security_update_2021-007 (including)
Mac_os_x Apple 10.15.7-security_update_2021-008 (including) 10.15.7-security_update_2021-008 (including)
Mac_os_x Apple 10.15.7-security_update_2022-001 (including) 10.15.7-security_update_2022-001 (including)
Mac_os_x Apple 10.15.7-security_update_2022-002 (including) 10.15.7-security_update_2022-002 (including)
Mac_os_x Apple 10.15.7-security_update_2022-003 (including) 10.15.7-security_update_2022-003 (including)
Mac_os_x Apple 10.15.7-security_update_2022-004 (including) 10.15.7-security_update_2022-004 (including)
Macos Apple 11.0 (including) 11.6.8 (excluding)
Macos Apple 12.0.0 (including) 12.4 (excluding)

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