Software: Ivanti Endpoint Manager
Affected Versions: <= 2020.1; <= 2019.1.3
Vendor page: www.ivanti.com
CVE Reference: CVE-2020-13774
Published: 12/11/2020
CVSS 3.1 Score: 9.9 – AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Attack Vector: Remote, authenticated
Credits: Andrei Constantin Scutariu, Lenk Ratchakrit, Calvin Yau
Summary
Improper validation on file upload functionality present in Ivanti Unified Endpoint Manager’s web management console permits an authenticated user to upload .aspx files and execute them on the MS IIS server’s context. The issue is caused by insufficient file extension validation and insecure file operations on the uploaded image, which upon failure will leave the temporarily created files in an accessible location on the server.
Solution
The issue has been successfully resolved by the vendor in version 2020.1.1. Customers can install the latest available software update to fix the vulnerability. The vendor also communicated this has also been fixed in version 2019.1.4, although this has not been verified by JUMPSEC.
Technical details
The “/LDMS/softwaredistribution/EditLaunchPadDialog.aspx” URL permits the upload of an image file on the server. Security controls on the file extension are implemented client-side and can thus be easily bypassed. By crafting a proper .ico image file containing ASP code and uploading it with .aspx extension, it is later possible to access and execute the malicious file on “/landesk/files/<filename>.aspx”.
The user must be authenticated and either part of “LANDesk Admnistrators” group or both part of “Landesk Management Suite” group and be assigned to the “Software Distribution” role in order to access the vulnerable component.
Timeline
15/04/2020: Issue reported to the vendor
16/04/2020: Vendor acknowledged the issues
02/06/2020: CVE number assigned from MITRE
13/07/2020: 90 days notice period for disclosure given to the vendor
12/11/2020: Advisory published by JUMPSEC
