The Versa Director GUI contains an unrestricted upload of file with dangerous type vulnerability that allows administrators with Provider-Data-Center-Admin or Provider-Data-Center-System-Admin privileges to customize the user interface. The “Change Favicon” (Favorite Icon) enables the upload of a .png file, which can be exploited to upload a malicious file with a .png extension disguised as an image.

The Versa Director SD-WAN orchestration platform provides an option to upload various types of files. The Versa Director does not correctly limit file upload permissions. The UI appears not to allow file uploads but uploads still succeed. In addition, the Versa Director discloses the full filename of uploaded temporary files, including the UUID prefix. Insecure UCPE image upload in Versa Director allows an authenticated attacker to upload a webshell. Exploitation Status: Versa Networks is not aware of any reported instance where this vulnerability was exploited. Proof of concept for this vulnerability has been disclosed by third party security researchers. Workarounds or Mitigation: There are no workarounds to disable the GUI option. Versa recommends that Director be upgraded to one of the remediated software versions.

The Versa Director offers REST APIs for orchestration and management. By design, certain APIs, such as the login screen, banner display, and device registration, do not require authentication. However, it was discovered that for Directors directly connected to the Internet, one of these APIs can be exploited by injecting invalid arguments into a GET request, potentially exposing the authentication tokens of other currently logged-in users. These tokens can then be used to invoke additional APIs on port 9183. This exploit does not disclose any username or password information. Currently, there are no workarounds in Versa Director. However, if there is Web Application Firewall (WAF) or API Gateway fronting the Versa Director, it can be used to block access to the URLs of vulnerable API. /vnms/devicereg/device/ (on ports 9182 & 9183) and /versa/vnms/devicereg/device/ (on port 443). Versa recommends that Directors be upgraded to one of the remediated software versions. This vulnerability is not exploitable on Versa Directors not exposed to the Internet.We have validated that no Versa-hosted head ends have been affected by this vulnerability. Please contact Versa Technical Support or Versa account team for any further assistance.

A XSS vulnerability exists in Versa Director Release: 16.1R2 Build: S8. An attacker can use the administration web interface URL to create a XSS based attack.