CVE Vulnerabilities

CVE-2018-10722

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

Published: May 04, 2018 | Modified: Jun 13, 2018
CVSS 3.x
7.8
HIGH
Source:
NVD
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS 2.x
7.2 HIGH
AV:L/AC:L/Au:N/C:C/I:C/A:C
RedHat/V2
RedHat/V3
Ubuntu

In Cylance CylancePROTECT before 1470, an unprivileged local user can obtain SYSTEM privileges because users have Modify access to the %PROGRAMFILES%CylanceDesktoplog folder, the CyUpdate process grants users Modify access to new files created in this folder, and a new file can be a symlink chain to a pathname of an arbitrary DLL that CyUpdate uses.

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
Cylanceprotect Cylance * *

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