SRC-2021-0007 : NetMotion Mobility Server MvcUtil valueStringToObject Deserialization of Untrusted Data Remote Code Execution Vulnerability

CVE ID: CVE-2021-26914

CVSS Score: 9.8, (/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)

Affected Vendors: NetMotion

Affected Products: NetMotion Mobility Server

Vulnerability Details:

This vulnerability allows remote attackers execute arbitrary code on affected installations of NetMotion Mobility Server. Authentication is not required to exploit this vulnerability.

The specific flaw exists within the MvcUtil class. The issue results from the lack of proper validation of user-supplied data, which can result in deserialization of untrusted data. An attacker can leverage this vulnerability to execute arbitrary code in the context of SYSTEM.

Vendor Response:

NetMotion has issued an update to correct this vulnerability. More details can be found at: https://www.netmotionsoftware.com/security-advisories/security-vulnerability-in-mobility-web-server-november-19-2020

Disclosure Timeline:

• 2020-11-19 – Sent to Beyond Security

• 2021-02-08 – Coordinated public release of advisory

Credit: This vulnerability was discovered by Steven Seeley (mr_me) of Qihoo 360 Vulcan Team

Acknowledgments:

Source Incite would like to acknowledge Beyond Security’s SSD program for the help with co-ordination of this vulnerability. More details can be found on their blog at https://ssd-disclosure.com/ssd-advisory-netmotion-mobility-server-multiple-deserialization-of-untrusted-data-lead-to-rce/.