CVE-2023-41991: Apple Multiple Products Improper Certificate Validation Vulnerability

Published Sep 21, 2023
·
Updated

A certificate validation issue was addressed. This issue is fixed in macOS Ventura 13.6, iOS 16.7 and iPadOS 16.7. A malicious app may be able to bypass signature validation. Apple is aware of a report that this issue may have been actively exploited against versions of iOS before iOS 16.7.

Other sources

App Store. The issue was addressed with improved handling of protocols.

— Apple

Apple iOS, iPadOS, macOS, and watchOS contain an improper certificate validation vulnerability that can allow a malicious app to bypass signature validation.

— CISA

Apple Neural Engine. A use-after-free issue was addressed with improved memory management.

— Apple

Apple Neural Engine. An out-of-bounds read was addressed with improved input validation.

— Apple

Apple Neural Engine. The issue was addressed with improved handling of caches.

— Apple

Credit

Bill Marczak(The Citizen Lab at The University of Toronto's Munk School), Maddie Stone(Google's Threat Analysis Group), Bill Marczak(The Citizen Lab at The University of Toronto), Maddie Stone(Google), Yiğit Can YILMAZ@@yilmazcanyigit, Mickey Jin@@patch1t, Kirin@@Pwnrin, James Hutchins, Linus Henze(Pinauten GmbH), Zhipeng Huo@@R3dF09(Tencent Security Xuanwu Lab), Dohyun Lee@@l33d0hyun(PK Security), Adam M.(SecuRing), (SecuRing), Wojciech Regula(SecuRing), Certik Skyfall Team, pattern-f@@pattern_F_(Ant Security Light), Mohamed GHANNAM@@_simo36, Ye Zhang@@VAR10CK(Baidu Security), Tim Michaud@@TimGMichaud(Moveworks), Chris Ross (Zoom), Liang Wei(PixiePoint Security), JeongOhKyea(Theori), 이준성(Junsung Lee)(Cross Republic), Pan ZhenPeng@@Peterpan0927(STAR Labs SG Pte), w0wbox, Csaba Fitzl@@theevilbit(Offensive Security), an anonymous researcher, weize she, Adriatik Raci(Sentry Cybersecurity)

Affected Software

13 affected componentsFixes available
Apple Multiple Products
Apple WatchOS<10.0.1
10.0.1
Apple WatchOS<9.6.3
9.6.3
Apple macOS Ventura<13.6
13.6
Apple iOS<16.7
16.7
Apple iPadOS<16.7
16.7
Apple iOS<17.0.1
17.0.1
Apple iPadOS<17.0.1
17.0.1
Apple iPadOS<16.7
Apple iPadOS=17.0
Apple iPhone OS<16.7
Apple iPhone OS=17.0
Apple macOS>=13.0<13.6

Remediation

Information

Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

Event History

Sep 21, 2023
Data Sourced
via Apple·12:00 AM
DescriptionWeaknessAffected Software
Updated
via Apple·12:00 AM
DescriptionWeakness
Updated
via Apple·12:00 AM
DescriptionWeaknessAffected Software
Updated
via Apple·12:00 AM
Affected Software
CVE Published
via MITRE·06:23 PM
Data Sourced
via MITRE·06:23 PM
DescriptionWeakness
Data Sourced
via NVD·07:15 PM
DescriptionSeverityWeaknessAffected Software
Sep 25, 2023
Known Exploited
via CISA·12:00 AM

Parent advisories

This vulnerability appears in the following advisories.

Peer vulnerabilities

Found alongside the following vulnerabilities.

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Frequently Asked Questions

1

What is the vulnerability ID of this issue?

The vulnerability ID of this issue is CVE-2023-41991.

2

What is the severity of CVE-2023-41991?

The severity of CVE-2023-41991 is not specified in the provided information.

3

Which Apple products are affected by CVE-2023-41991?

macOS Ventura 13.6, iOS up to 16.7, iPadOS up to 16.7, watchOS up to 9.6.3, iOS up to 17.0.1, and iPadOS up to 17.0.1 are affected by CVE-2023-41991.

4

How can a malicious app exploit CVE-2023-41991?

A malicious app may be able to bypass signature validation.

5

Is there a fix for CVE-2023-41991?

Yes, this issue is fixed in iOS 16.7 and iPadOS 16.7, OS 17.0.1 and iPadOS 17.0.1, watchOS 9.6.3, and macOS Ventura 13.6.

Company

Resources

Contact

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