Exploited
medium
5.5
CWE
295 416 20
Advisory Published
CVE Published
Updated

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

First published: Thu 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.

Credit: Bill Marczak The Citizen Lab at The University of Toronto's Munk SchoolMaddie Stone Google's Threat Analysis GroupBill Marczak The Citizen Lab at The University of TorontoMaddie Stone Google product-security@apple.com Yiğit Can YILMAZ @yilmazcanyigit Mickey Jin @patch1t Kirin @Pwnrin James Hutchins Linus Henze Pinauten GmbHZhipeng Huo @R3dF09 Tencent Security Xuanwu LabDohyun Lee @l33d0hyun PK SecurityAdam M. SecuRing SecuRingWojciech Regula SecuRingCertik Skyfall Team pattern-f @pattern_F_ Ant Security LightMohamed GHANNAM @_simo36 Ye Zhang @VAR10CK Baidu SecurityTim Michaud @TimGMichaud MoveworksChris Ross (Zoom) Liang Wei PixiePoint SecurityJeongOhKyea Theori이준성(Junsung Lee) Cross RepublicPan ZhenPeng @Peterpan0927 STAR Labs SG Ptew0wbox Csaba Fitzl @theevilbit Offensive Securityan anonymous researcher weize she Adriatik Raci Sentry Cybersecurity

Affected SoftwareAffected VersionHow to fix
Apple Multiple Products
Apple iOS, iPadOS, and watchOS<10.0.1
10.0.1
Apple iOS, iPadOS, and watchOS<9.6.3
9.6.3
macOS Ventura<13.6
13.6
Apple iOS and iPadOS<16.7
16.7
Apple iOS, iPadOS, and macOS<16.7
16.7
Apple iOS and iPadOS<17.0.1
17.0.1
Apple iOS, iPadOS, and macOS<17.0.1
17.0.1
Apple iOS, iPadOS, and macOS<16.7
Apple iOS, iPadOS, and macOS=17.0
iPhone OS<16.7
iPhone OS=17.0
macOS>=13.0<13.6
<16.7
16.7
<16.7
16.7

Remedy

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

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Reference Links

Parent vulnerabilities

(Appears in the following advisories)

Peer vulnerabilities

(Found alongside the following vulnerabilities)

Frequently Asked Questions

  • What is the vulnerability ID of this issue?

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

  • What is the severity of CVE-2023-41991?

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

  • 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.

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

    A malicious app may be able to bypass signature validation.

  • 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.

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