Background exploitation KEV catalog No authentication

CVE-2017-0037

Microsoft Edge and Internet Explorer Type Confusion Vulnerability

CheckOps priority index

8.1/10 Patch within 24 h

Severity8.1

Probability8.0

Exploitation4/5

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

EPSS · today 80.4% higher than 99.6% of CVEs

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

Exploited for 1,681 days 28 Mar 2022

CISA due date 18 Apr 2022 for US federal agencies

Exploitation probability EPSS · FIRST

EPSS probability (%)Percentile among all CVEs

Exploitation signals 4 / 5

KEV catalog (CISA)28 Mar 2022
Exploited in EUVD (ENISA)28 Mar 2022
Used by ransomwareno
EPSS above 10 %80.4%
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

Microsoft Internet Explorer 10 and 11 and Microsoft Edge have a type confusion issue in the Layout::MultiColumnBoxBuilder::HandleColumnBreakOnColumnSpanningElement function in mshtml.dll, which allows remote attackers to execute arbitrary code via vectors involving a crafted Cascading Style Sheets (CSS) token sequence and crafted JavaScript code that operates on a TH element.

Affected products

Internet BrowserEdge and Internet Explorer

Affected versions

Internet Explorer 10 and 11 and Edge

Weaknesses (CWE)

CWE-704

Open source packages OSV

Affected libraries according to OSV, with fixed versions.

Timeline

26 Feb 2017
Published
28 Mar 2022
Exploitation reported (ENISA)
28 Mar 2022
Added to the KEV catalog
18 Apr 2022
CISA remediation due date
26 Sept 2026
EPSS peak: 80.4%

References

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