Background exploitation KEV catalog Ransomware

CVE-2022-30190

Microsoft Windows Support Diagnostic Tool (MSDT) Remote Code Execution Vulnerability

CheckOps priority index

8.5/10 Patch within 24 h

Severity7.8

Probability9.9

Exploitation4/5

Severity = CVSS. Probability = EPSS (FIRST). Exploitation = public signals: KEV, EUVD, ransomware, EPSS above 10 %, no account required.

EPSS · today 99.2% higher than 99.9% of CVEs

CVSS 3.1 7.8 AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:

Exploited for 1,603 days 14 Jun 2022

CISA due date 05 Jul 2022 for US federal agencies

Exploitation probability EPSS · FIRST

EPSS probability (%)Percentile among all CVEs

Exploitation signals 4 / 5

KEV catalog (CISA)14 Jun 2022
Exploited in EUVD (ENISA)14 Jun 2022
Used by ransomwareyes
EPSS above 10 %99.2%
No account, over the networkno

What to do

Fix

Apply the vendor’s fix as soon as it is available.

CISA guidance: Apply updates per vendor instructions.

Meanwhile

Take the service off the internet or restrict access to it, watch the logs and look for signs of compromise.

Manufacturers (CRA)

Exploited vulnerability in your product: early warning to ENISA within 24 h, then notification within 72 h (Article 14 of the Cyber Resilience Act). The CRA explained

Description ENISA EUVD

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. Please see the MSRC Blog Entry for important information about steps you can take to protect your system from this vulnerability.

Affected products

Windows 10 Version 21H2Windows Server 2012Windows Server 2019 (Server Core installation)Windows Server 2016Windows 7 Service Pack 1Windows Server 2019Windows Server 2008 R2 Service Pack 1Windows 11 version 21H2Windows 10 Version 21H1Windows Server 2008 R2 Service Pack 1 (Server Core installation)Windows Server 2022Windows Server 2012 (Server Core installation)Windows 10 Version 1607Windows 10 Version 20H2Windows Server 2012 R2 (Server Core installation)Windows Server 2012 R2Windows 8.1Windows Server 2016 (Server Core installation)Windows 10 Version 1809Windows Server version 20H2Windows 7Windows 10 Version 1507Windows

Affected versions

10.0.19043.0 <10.0.19044.1766
6.2.9200.0 <6.2.9200.23736
10.0.17763.0 <10.0.17763.3046
10.0.14393.0 <10.0.14393.5192
6.1.0 <6.1.7601.25984
6.1.7601.0 <6.1.7601.25984
10.0.0 <10.0.22000.739
10.0.0 <10.0.19043.1766
10.0.20348.0 <10.0.20348.770
10.0.0 <10.0.19042.1766
6.3.9600.0 <6.3.9600.20402
6.3.0 <6.3.9600.20402

Weaknesses (CWE)

CWE-610

Open source packages OSV

Affected libraries according to OSV, with fixed versions.

Timeline

01 Jun 2022
Published
14 Jun 2022
Exploitation reported (ENISA)
14 Jun 2022
Added to the KEV catalog
05 Jul 2022
CISA remediation due date
26 Sept 2026
EPSS peak: 99.2%

References

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