Threat Level
MEDIUM
Software Affected
- Facebook Messenger Desktop Application version 460.16
Overview
This vulnerability allows an attacker to execute malicious files already present on a compromised system.
Description
According to the researchers, this vulnerability application triggers a call to load Windows Powershell from the location of “C:\python27”. This path automatically creates when installing python version 2.7 which does not commonly exist in most windows installations.
An attacker could hijack such calls to load potentially non-existence resources to covertly execute malware to gain persistence and extended access to the system.
Impact
- Possibility of exposing confidential information to unauthorized parties
- The system could be infected with malware
Solution/ Workarounds
- Upgrade to the latest Facebook Messenger Desktop version 480.5
https://www.microsoft.com/en-us/p/messenger/9wzdncrf0083?activetab=pivot:overviewtab
Reference
- https://www.cert-in.org.in
- https://blog.reasonsecurity.com/2020/06/11/persistence-method-using-facebook-messenger-desktop-app/
- https://thehackernews.com/2020/06/facebook-malware-persistence.html
Disclaimer
The information provided herein is on "as is" basis, without warranty of any kind.
Source: Sri Lanka CERT|CC
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