Privilege Escalation via Symlink Chain in Cylance CylancePROTECT

CVE-2018-10722 · HIGH Severity

AV:L/AC:L/AU:N/C:C/I:C/A:C

In Cylance CylancePROTECT before 1470, an unprivileged local user can obtain SYSTEM privileges because users have Modify access to the %PROGRAMFILES%\Cylance\Desktop\log 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.

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