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CVE-2020-27930

Apple Multiple Products Memory Corruption

7.8 HIGHActively exploited (CISA KEV)EPSS 22.0%
  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 FontParser contain a memory corruption vulnerability which may allow for code execution when processing maliciously crafted front.

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

Description

A memory corruption issue was addressed with improved input validation. 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. Processing a maliciously crafted font may lead to arbitrary code execution.

CVSS 3.1 breakdown

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

Affected products

Apple iPadOS< 14.2
Apple iPhone OS≥ 14.0 < 14.2 · < 12.4.9
Apple macOS≥ 11.0 < 11.0.1
Apple Mac OS X< 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 Mac OS X≥ 10.15.7
Apple Watchos≥ 6.2.9

References

and 1 more references

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Frequently asked

Is CVE-2020-27930 being actively exploited?

Yes. CVE-2020-27930 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added 3 Nov 2021.

How severe is CVE-2020-27930?

CVE-2020-27930 has a CVSS 3.1 base score of 7.8, rated high. EPSS estimates a 22.0% probability of exploitation.

Which products are affected by CVE-2020-27930?

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

How do I fix CVE-2020-27930?

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-2020-27930 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.