Microsoft Internet Explorer Memory Corruption Vulnerability

Microsoft Internet Explorer 8 through 10 allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via a crafted web site, aka "Internet Explorer Memory Corruption Vulnerability," a different…

CheckOps priority index

8.0/10 Patch within 24 h

Severity8.8

Probability7.1

Exploitation4/5

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

EPSS · today 70.7% higher than 99.4% of CVEs

CVSS 3.1 8.8 AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:

Exploited for 1,314 days 30 Mar 2023

CISA due date 20 Apr 2023 for US federal agencies

Exploitation probability EPSS · FIRST

EPSS probability (%)Percentile among all CVEs

Exploitation signals 4 / 5

KEV catalog (CISA)30 Mar 2023
Exploited in EUVD (ENISA)30 Mar 2023
Used by ransomwareno
EPSS above 10 %70.7%
No account, over the networkyes

What to do

Fix

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

CISA guidance: The impacted product is end-of-life and should be disconnected if still in use.

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

Weaknesses (CWE)

CWE-94

Open source packages OSV

Affected libraries according to OSV, with fixed versions.

Timeline

10 Jul 2013
Published
30 Mar 2023
Exploitation reported (ENISA)
30 Mar 2023
Added to the KEV catalog
20 Apr 2023
CISA remediation due date
26 Sept 2026
EPSS peak: 70.7%

References

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