Microsoft Windows COM+ Event System Service Privilege Escalation Vulnerability

Windows COM+ Event System Service Elevation of Privilege Vulnerability

CheckOps priority index

4.4/10 Patch within 7 days

Severity7.8

Probability0.2

Exploitation2/5

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

EPSS · today 1.9% higher than 79.5% of CVEs

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

Exploited for 1,484 days 11 Oct 2022

CISA due date 01 Nov 2022 for US federal agencies

Exploitation probability EPSS · FIRST

EPSS probability (%)Percentile among all CVEs

Exploitation signals 2 / 5

KEV catalog (CISA)11 Oct 2022
Exploited in EUVD (ENISA)11 Oct 2022
Used by ransomwareno
EPSS above 10 %1.9%
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

Affected products

Windows 11 version 22H2Windows Server 2019 (Server Core installation)Windows 10 Version 1507Windows Server 2008 Service Pack 2Windows 10 Version 1809Windows Server 2008 R2 Service Pack 1 (Server Core installation)Windows 10 Version 21H1Windows Server 2016Windows 10 Version 21H2Windows 7Windows Server 2019Windows Server 2022Windows Server 2012 (Server Core installation)Windows Server 2008 Service Pack 2Windows Server 2008 R2 Service Pack 1Windows Server 2016 (Server Core installation)Windows 11 version 21H2Windows 7 Service Pack 1Windows Server 2012 R2 (Server Core installation)Windows Server 2008 Service Pack 2 (Server Core installation)Windows 8.1Windows 10 Version 1607Windows Server 2012Windows Server 2012 R2Windows 10 Version 20H2Windows COM+ Event System Service

Affected versions

10.0.22621.0 <10.0.22621.674
10.0.17763.0 <10.0.17763.3532
10.0.10240.0 <10.0.10240.19507
6.0.6003.0 <6.0.6003.21721
6.1.7601.0 <6.1.7601.26174
10.0.0 <10.0.19043.2130
10.0.14393.0 <10.0.14393.5427
10.0.19043.0 <10.0.19044.2130
6.1.0 <6.1.7601.26174
10.0.20348.0 <10.0.20348.1129
6.2.9200.0 <6.2.9200.23920
10.0.0 <10.0.22000.1098

Weaknesses (CWE)

CWE-843

Open source packages OSV

Affected libraries according to OSV, with fixed versions.

Timeline

11 Oct 2022
Published
11 Oct 2022
Exploitation reported (ENISA)
11 Oct 2022
Added to the KEV catalog
01 Nov 2022
CISA remediation due date

References

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