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Severity
High
Analysis Summary
A zero-day vulnerability in Microsoft Office is being actively exploited in the wild, and while there isn’t currently a patch, the software giant has published workarounds to thwart attacks. CVE-2022-30190, also known as “Follina,” is a remote code execution (RCE) vulnerability affecting the Microsoft Support Diagnostic Tool (MSDT) in Windows.
CVE-2022-30190
Microsoft Windows could allow a remote attacker to execute arbitrary code on the system, caused by a flaw in the Support Diagnostic Tool (MSDT) component. By persuading a victim to open specially-crafted content, an attacker could exploit this vulnerability to execute arbitrary code on the system. Microsoft Support Diagnostics Tool (MSDT) is used by support professionals for troubleshooting.
According to the researcher, maldoc retrieves an HTML file from a server using Word’s template feature. The malicious payload is then obtained via the “ms-msdt: //” URI scheme.
The attackers who successfully exploit this vulnerability can run arbitrary code with the privileges of the calling application. The attacker can then install programs, view, change, delete data, or create new accounts in the context allowed by the user’s permissions.
Here are the workaround guidance shared by Microsoft:
Impact
- Code Execution
- Privilege Escalation
Indicators Of Compromise
MD5
- d16427f5cff23f456934e7aecaba226c
- 8336a6aeb41b066918c5cc7f27a4c36b
SHA-256
- e96e066197c5b3fd38e7a12318a232de2c8a703a0f419e0b7e30087f7525e530
- 50961ee399fc45bdfcec9201e069417a8bd00bc38bd1707a32c65451c33a17da
SHA-1
- 3938dd5317ff3f2fa4baa06f39c2b240e2a896e9
- 2f0a7feac7da9c714aed0783b7f9e2f4bcf7783b
URL
- https[:]//consumerfinanceguide[.]com/blog/index/blog[.]html
Affected Vendors
Microsoft
Affected Products
- Microsoft Windows 7 SP1 x32
- Microsoft Windows 7 SP1 x64
- Microsoft Windows Server 2008 R2 X64
- Microsoft Windows Server 2012
- Microsoft Windows 8.1 x32
- Microsoft Windows 8.1 x64
- Microsoft Windows RT 8.1
- Microsoft Windows Server 2012 R2
- Microsoft Windows 10 x32
- Microsoft Windows 10 x64
- Microsoft Windows Server 2016
- Microsoft Windows Server 2019
- Microsoft Windows 10 1809 for x64-based Systems
- Microsoft Windows 10 1809 for 32-bit Systems
- Microsoft Windows 10 1809 for ARM64-based Systems
- Microsoft Windows 10 1607 for 32-bit Systems
- Microsoft Windows 10 1607 for x64-based Systems
- Microsoft Windows 10 20H2 for 32-bit Systems
- Microsoft Windows 10 20H2 for ARM64-based Systems
- Microsoft Windows 10 20H2 for x64-based Systems
- Microsoft Windows Server (Server Core installation) 2019
- Microsoft Windows Server (Server Core installation) 20H2
- Microsoft Windows Server (Server Core installation) 2016
- Microsoft Windows Server (Server Core installation) 2012 R2
- Microsoft Windows Server (Server Core installation) 2012
- Microsoft Windows Server for X64-based systems (Server Core installation) 2008 R2
- Microsoft Windows Server for X64-based systems 2008 R2 SP1
- Microsoft Windows Server for 32-bit systems (Server Core installation) 2008 SP2
- Microsoft Windows Server for 32-bit systems 2008 SP2
- Microsoft Windows Server for X64-based systems (Server Core installation) 2008 R2 SP1
- Microsoft Windows 10 21H1 for 32-bit Systems
- Microsoft Windows 10 21H1 for ARM64-based Systems
- Microsoft Windows 10 21H1 for x64-based Systems
- Microsoft Windows Server 2022
- Microsoft Windows Server (Server Core installation) 2022
- Microsoft Windows Server for X64-based systems 2008 SP2
- Microsoft Windows 11 x64
- Microsoft Windows 11 ARM64
- Microsoft Windows 10 21H2 for 32-bit Systems
- Microsoft Windows 10 21H2 for ARM64-based Systems
- Microsoft Windows 10 21H2 for x64-based Systems
- Microsoft Windows Server 2022 Azure Edition Core Hotpatch
Remediation
- Use Microsoft Automatic Update to apply the appropriate patch for your system, or the Microsoft Security Update Guide to search for available patches.
- Customers using Microsoft Defender Antivirus should turn-on cloud-delivered protection and automatic sample submission.
- Customers that use Microsoft Defender for Endpoint can set the “BlockOfficeCreateProcessRule” attack surface reduction rule, which prevents Office apps from generating child processes.
- Block the threat indicators at their respective controls.
- Search for IOCs in your environment.