Is CVE-2020-3909 in the CISA KEV catalog?

No. CVE-2020-3909 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2020-3909?

CVE-2020-3909 has a CVSS v3 base score of 9.8 (CRITICAL).

What is the EPSS score for CVE-2020-3909?

CVE-2020-3909 has an EPSS score of 2.96% (86th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2020-3909?

Upgrade iCloud (Legacy) to 7.18 or later. Fixes are available for 2 affected products.

CVE & CISA-KEV Catalog

CVE-2020-3909

CRITICALEPSS 86th pctl

9.8

CVSS v3

NVD

Description

A buffer overflow was addressed with improved bounds checking. This issue is fixed in iOS 13.4 and iPadOS 13.4, macOS Catalina 10.15.4, tvOS 13.4, watchOS 6.2, iTunes for Windows 12.10.5, iCloud for Windows 10.9.3, iCloud for Windows 7.18. Multiple issues in libxml2.

CWE-120Classic Buffer Overflow

How to fix

Remediation Available

iCloud (Legacy)Windows application

Affected:7.18Fixed in:7.18Apple Inc.

Affected:10.9 10.9.3Fixed in:10.9.3Apple Inc.

iTunesWindows application

Affected:12.10.5Fixed in:12.10.5Apple Inc.

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

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

2.96%probability of exploitation in 30 days

86thpercentile

Elevated risk: more likely to be exploited than 86% of all known CVEs.

References

Vendor Advisory7

Third-Party Advisory1

oracle.com

Related Vulnerabilities

Other CWE-120 (Classic Buffer Overflow) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2014-0195	Medium	6.8	100%	-	Fix
CVE-2017-7269	Critical	9.8	100%	KEV	-
CVE-2019-11043	High	8.7	99%	KEV + Ransom	Fix
CVE-2011-4862	High	10.0	95%	-	Fix
CVE-2007-5659	High	7.8	94%	KEV	Fix
CVE-2022-3786	High	7.5	91%	-	Fix

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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.