CVE-2017-5219 Information

Description

An issue was discovered in SageCRM 7.x before 7.3 SP3. The Component Manager functionality provided by SageCRM permits additional components to be added to the application to enhance provided functionality. This functionality allows a zip file to be uploaded containing a valid .ecf component file which will be extracted to the inf directory outside of the webroot. By creating a zip file containing an empty .ecf file to pass file-validation checks any other file provided in zip file will be extracted onto the filesystem. In this case a web shell with the filename ‘..\WWWRoot\CustomPages\aspshell.asp’ was included within the zip file that when extracted traversed back out of the inf directory and into the SageCRM webroot. This permitted remote interaction with the underlying filesystem with the highest privilege level SYSTEM.

CVSS Vector

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Reference

http://research.aurainfosec.io/disclosures/sagecrm-CVE-2017-5219-CVE-2017-5218/ http://www.securityfocus.com/bid/95968

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

9.8