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Fs registry repair tool... update#

Microsoft Security Update Guide for CVE-2022-30190.

Identifying affected systemsĪ list of Tenable plugins to detect this vulnerability and the workaround can be found here. The initial workaround and detection information from Microsoft still apply, but patches are the recommended step to fully address this vulnerability.

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Microsoft released patches for CVE-2022-30190 on June 14, alongside Patch Tuesday. Microsoft’s advisory confirms that the vulnerability was disclosed by a member of the Shadow Chaser Group. On May 30, Microsoft released mitigation guidance for this vulnerability and assigned it CVE-2022-30190. It was also reported over the weekend that this vulnerability was disclosed to, and dismissed by, Microsoft in April by the Shadow Chaser Group. Huntress Labs has released a detailed technical breakdown of the vulnerability and other researchers have published proofs-of-concept on GitHub. Given that, and the availability of exploit code, we expect to see broader attacks targeting CVE-2022-31090 in the near future. Researchers have compared CVE-2022-31090 to CVE-2021-40444, which has been widely exploited.

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If the malicious file is in RTF, once the target selects the malicious file in Windows Explorer, the exploit will trigger.

Huntress Labs and Kevin Beaumont both discovered that rich text format (RTF) circumvents Protected View, a key defense against malicious documents in Microsoft Office highlighted in Microsoft’s mitigation guidance. According to Microsoft, attackers can “install programs, view, change, or delete data, or create new accounts.” The attacks observed in April executed PowerShell code. By exploiting this vulnerability, an attacker can execute commands with the permissions of the application used to open the malicious document. Microsoft explains, “The word Remote in the title refers to the location of the attacker The attack itself is carried out locally.”Īn attacker would craft a malicious document, Microsoft Word is common, and send it to their target via email. Because of the way this vulnerability is exploited, Microsoft lists the attack vector as “local,” but an attacker leveraging this flaw would likely be remote. The vulnerability exists due to the way MSDT is called using the URL protocol from certain applications.

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AnalysisĬVE-2022-30190 is a remote code execution vulnerability in MSDT that impacts several versions of Microsoft Office, including patched versions of Office 20. The original VirusTotal submission indicates that it may have also been used against targets in Belarus. In his analysis, Kevin Beaumont was able to trace the exploitation of this vulnerability back to April in attacks against targets in Russia. Several researchers were able to reproduce the exploit and Huntress Labs was able to produce a zero click version, in which the targeted user would only need to select the malicious file to trigger the exploit. Over the weekend, researchers in the cybersecurity community did further analysis of the malicious file and discovered it was exploiting a zero-day vulnerability in Microsoft Windows Support Diagnostic Tool (MSDT).

It uses Word's external link to load the HTML and then uses the 'ms-msdt' scheme to execute PowerShell code. Interesting maldoc was submitted from Belarus. Because this was a zero day at the time, researchers referred to it as “Follina,” pending the assignment of a CVE number. On May 27, a security researcher going by nao_sec posted on Twitter about an “interesting” document they found on VirusTotal that was used to execute PowerShell code. Update June 15: The Solution section has been updated now that Microsoft has released fixed versions to address this vulnerability.