Microsoft Windows LSA Spoofing Vulnerability

Windows LSA Spoofing Vulnerability

CheckOps priority index

6.0/10 Patch within 7 days

Severity8.1

Probability1.0

Exploitation4/5

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

EPSS · today 10.5% higher than 95.8% of CVEs

CVSS 3.1 8.1 AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:

Exploited for 1,586 days 01 Jul 2022

CISA due date 22 Jul 2022 for US federal agencies

Exploitation probability EPSS · FIRST

EPSS probability (%)Percentile among all CVEs

Exploitation signals 4 / 5

KEV catalog (CISA)01 Jul 2022
Exploited in EUVD (ENISA)01 Jul 2022
Used by ransomwareno
EPSS above 10 %10.5%
No account, over the networkyes

What to do

Fix

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

CISA guidance: Apply remediation actions outlined in CISA guidance [https://www.cisa.gov/guidance-applying-june-microsoft-patch].

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 Server 2008 Service Pack 2Windows Server 2022Windows 10 Version 20H2Windows 10 Version 1909Windows Server 2008 Service Pack 2Windows Server version 20H2Windows Server 2016Windows 10 Version 21H1Windows Server 2012 (Server Core installation)Windows Server 2008 Service Pack 2 (Server Core installation)Windows 10 Version 1809Windows 10 Version 1607Windows Server 2012 R2Windows Server 2019Windows Server 2016 (Server Core installation)Windows Server 2008 R2 Service Pack 1 (Server Core installation)Windows 7 Service Pack 1Windows Server 2008 R2 Service Pack 1Windows Server 2012 R2 (Server Core installation)Windows 10 Version 1507Windows Server 2019 (Server Core installation)Windows 8.1Windows 10 Version 21H2Windows 11 version 21H2Windows 7Windows Server 2012Windows

Affected versions

6.0.6003.0 <6.0.6003.21481
10.0.20348.0 <10.0.20348.707
10.0.0 <10.0.19042.1706
10.0.0 <10.0.18363.2274
10.0.14393.0 <10.0.14393.5125
10.0.0 <10.0.19043.1706
6.2.9200.0 <6.2.9200.23714
10.0.0 <10.0.17763.2928
6.3.9600.0 <6.3.9600.20371
10.0.17763.0 <10.0.17763.2928
6.1.7601.0 <6.1.7601.25954
6.1.0 <6.1.7601.25954

Weaknesses (CWE)

CWE-306

Open source packages OSV

Affected libraries according to OSV, with fixed versions.

Timeline

10 May 2022
Published
01 Jul 2022
Exploitation reported (ENISA)
01 Jul 2022
Added to the KEV catalog
22 Jul 2022
CISA remediation due date
26 Sept 2026
EPSS peak: 10.7%

References

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