Ultima have been made aware about the Microsoft Zero-Day Vulnerability –
Microsoft Windows Support Diagnostic Tool (MSDT) Remote Code Execution Vulnerability (CVE-2022-30190)
On Monday May 30, 2022, Microsoft issued CVE-2022-30190 regarding the Microsoft Support Diagnostic Tool (MSDT) in Windows vulnerability.
A remote code execution vulnerability exists when MSDT is called using the URL protocol from a calling application such as Word. An attacker who successfully exploits this vulnerability can run arbitrary code with the privileges of the calling application. The attacker can then install programs, view, change, or delete data, or create new accounts in the context allowed by the user’s rights.
CVE Score Microsoft – 7.8 / 7.3
CVE Score NVD – 9.8
Affected Systems – Windows
Detection – Initial analysis from the cyber security research community discovered that detections for this novel tactic were lacking in many endpoint sensors but vendors have been quick to improve their coverage. Microsoft, for example, has released updates on 31 May under the following signatures, using detection build 1.367.719.0 or newer:
Mitigation – No patch available yet from Microsoft, and we expect it to be included in the June “Patch Tuesday” release. Microsoft has provided a workaround for this vulnerability. However, since this workaround may severely impact tools and applications from functioning correctly, we advise that organisations wishing to implement this change should carefully scrutinise their environment to avoid unwanted consequences.
There are however the following technical workarounds that can be used to help prevent the chance of exploit.
No effect on user experience: Ensure that your endpoint antivirus is up to date, consulting your vendor how they are protecting against the threat.
Some effect on user experience:
Potentially disrupting to user experience:
(NGAV) to all devices within your environments to allow for early detection –