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CVE-2020-27950

Apple Multiple Products Memory Initialization

5.5 MEDIUMActively exploited (CISA KEV)EPSS 16.5%
  1. Published8 Dec 2020
  2. Added to CISA KEV3 Nov 2021
  3. Remediation due3 May 2022
Actively exploited (CISA KEV)

Apple iOS, iPadOS, macOS, and watchOS contain a memory initialization vulnerability that may allow a malicious application to disclose kernel memory.

Added to KEV: 3 Nov 2021Federal remediation due: 3 May 2022

Description

A memory initialization issue was addressed. This issue is fixed in macOS Big Sur 11.0.1, watchOS 7.1, iOS 12.4.9, watchOS 6.2.9, Security Update 2020-006 High Sierra, Security Update 2020-006 Mojave, iOS 14.2 and iPadOS 14.2, watchOS 5.3.9, macOS Catalina 10.15.7 Supplemental Update, macOS Catalina 10.15.7 Update. A malicious application may be able to disclose kernel memory.

CVSS 3.1 breakdown

Attack vectorLocal
Attack complexityLow
Privileges requiredNone
User interactionRequired
ScopeUnchanged
ConfidentialityHigh
IntegrityNone
AvailabilityNone
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

Affected products

Apple iPadOS< 14.2
Apple iPhone OS≥ 14.0 < 14.2 · < 12.4.9
Apple macOS≥ 11.0 < 11.0.1 · < 10.15.7
Apple Watchos≥ 6.0 < 6.2.9 · ≥ 7.0 < 7.1 · < 5.3.9

Remediation

Fixed in
Apple iPadOS≥ 14.2
Apple iPhone OS≥ 14.2
Apple macOS≥ 11.0.1
Apple Watchos≥ 6.2.9

References

and 1 more references

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Frequently asked

Is CVE-2020-27950 being actively exploited?

Yes. CVE-2020-27950 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added 3 Nov 2021.

How severe is CVE-2020-27950?

CVE-2020-27950 has a CVSS 3.1 base score of 5.5, rated medium. EPSS estimates a 16.5% probability of exploitation.

Which products are affected by CVE-2020-27950?

Affected products include Apple iPadOS, Apple iPhone OS, Apple macOS, Apple Watchos.

How do I fix CVE-2020-27950?

Upgrade affected software to a fixed version, for example Apple iPadOS 14.2, Apple iPhone OS 14.2, Apple macOS 11.0.1 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2020-27950 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. Because it is on the CISA KEV list, Secuno flags any affected asset as top-priority automatically. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.