VWE-2017-4267 Printable Version

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- Created by
  pegasus
  on December 2, 2017
  
  Last updated by
  pegasus
  on April 8, 2018

Common Name None
VWE-ID VWE-2017-4267
Related Report #5312
Severity LOW
Exploit Difficulty EASY
Platform XenForo
Description (Accidental) Permissions Escalation. Incorrect values in the "Not Set" column when customizing usergroup permissions for a specific area could lead an admin to grant more permissions than intended for that area. Does not affect Lite versions.

Discovered November 9, 2017
Resolved December 1, 2017
Patches Available 4.0.20 Patch Level 1
4.0.19 Patch Level 4
4.0.18 Patch Level 5
4.0.17 Patch Level 7
4.0.16 Patch Level 8
4.0.15 Patch Level 12
Workaround One might treat the "Not Set" values as unknown even if they are specified, in order to avoid acting on misleading information. Prior to 4.0.12, the "Not Set" column did not specify inherited values, so the misleading information did not exist.
The versions listed below are known to be affected by this issue. If you are using one of those versions, you should update to a newer release that has no known vulnerabilities.

Common Name	None
VWE-ID	VWE-2017-4267
Related Report	#5312
Severity	LOW
Exploit Difficulty	EASY
Platform	XenForo
Description	(Accidental) Permissions Escalation. Incorrect values in the "Not Set" column when customizing usergroup permissions for a specific area could lead an admin to grant more permissions than intended for that area. Does not affect Lite versions.
Discovered	November 9, 2017
Resolved	December 1, 2017
Patches Available	4.0.20 Patch Level 1 4.0.19 Patch Level 4 4.0.18 Patch Level 5 4.0.17 Patch Level 7 4.0.16 Patch Level 8 4.0.15 Patch Level 12
Workaround	One might treat the "Not Set" values as unknown even if they are specified, in order to avoid acting on misleading information. Prior to 4.0.12, the "Not Set" column did not specify inherited values, so the misleading information did not exist.