Is CVE-2018-4227 in the CISA KEV catalog?

No. CVE-2018-4227 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2018-4227?

CVE-2018-4227 has a CVSS v3 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2018-4227?

CVE-2018-4227 has an EPSS score of 1.89% (77th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2018-4227?

Upgrade iphone os to 11.4 or later. Fixes are available for 2 affected products.

CVE & CISA-KEV Catalog

CVE-2018-4227

HIGHEPSS 77th pctl

7.5

CVSS v3

NVD

Description

An issue was discovered in certain Apple products. iOS before 11.4 is affected. macOS before 10.13.5 is affected. The issue involves the "Mail" component. It allows remote attackers to read the cleartext content of S/MIME encrypted messages via direct exfiltration.

CWE-319

How to fix

Remediation Available

iphone osNVD

Affected:< 11.4Fixed in:11.4CVE-2018-4227derived from NVD

mac os xNVD

Affected:< 10.13.5Fixed in:10.13.5CVE-2018-4227derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityNone

AvailabilityNone

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Exploit Intelligence

1.89%probability of exploitation in 30 days

77thpercentile

Elevated risk: more likely to be exploited than 77% of all known CVEs.

References

Exploit1

efail.de

Vendor Advisory2

Third-Party Advisory2

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.