Background exploitation KEV catalog Ransomware No authentication

CVE-2019-0752

Microsoft Internet Explorer Type Confusion Vulnerability

A remote code execution vulnerability exists in the way that the scripting engine handles objects in memory in Internet Explorer, aka 'Scripting Engine Memory Corruption Vulnerability'. This CVE ID is unique from CVE-2019-0739,…

CheckOps priority index

8.5/10 Patch within 24 h

Severity7.5

Probability8.2

Exploitation5/5

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

EPSS · today 81.7% higher than 99.6% of CVEs

CVSS 3.1 7.5 AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:

Exploited for 1,722 days 15 Feb 2022

CISA due date 15 Aug 2022 for US federal agencies

Exploitation probability EPSS · FIRST

EPSS probability (%)Percentile among all CVEs

Exploitation signals 5 / 5

KEV catalog (CISA)15 Feb 2022
Exploited in EUVD (ENISA)15 Feb 2022
Used by ransomwareyes
EPSS above 10 %81.7%
No account, over the networkyes

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

Affected products

Internet Explorer 11Internet Explorer 10Internet Explorer

Affected versions

Windows Server 2012 R2
Windows Server 2016
Windows 10 Version 1607 for 32-bit Systems
Windows 10 for x64-based Systems
Windows 10 for 32-bit Systems
Windows 10 Version 1709 for x64-based Systems
Windows 10 Version 1809 for 32-bit Systems
Windows Server 2008 R2 for x64-based Systems Service Pack 1
Windows 10 Version 1803 for 32-bit Systems
Windows 10 Version 1703 for x64-based Systems
Windows 10 Version 1803 for x64-based Systems
Windows Server 2019

Weaknesses (CWE)

CWE-843

Open source packages OSV

Affected libraries according to OSV, with fixed versions.

Timeline

09 Apr 2019
Published
15 Feb 2022
Exploitation reported (ENISA)
15 Feb 2022
Added to the KEV catalog
15 Aug 2022
CISA remediation due date
06 Oct 2026
EPSS peak: 81.7%

References

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