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 TorontoMaddie Stone GoogleBill 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 Toronto's Munk SchoolMaddie Stone Google's Threat Analysis GroupBill 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 Toronto's Munk SchoolMaddie Stone Google's Threat Analysis Group product-security@apple.com product-security@apple.com product-security@apple.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Apple iOS | <17.0.1 | 17.0.1 |
| Apple iPadOS | <17.0.1 | 17.0.1 |
| Apple watchOS | <10.0.1 | 10.0.1 |
| Apple macOS Ventura | <13.6 | 13.6 |
| Apple watchOS | <9.6.3 | 9.6.3 |
| Apple iOS | <16.7 | 16.7 |
| Apple iPadOS | <16.7 | 16.7 |
| Apple iPadOS | <16.7 | |
| Apple iPhone OS | <16.7 | |
| Apple macOS | >=13.0<13.6 | |
| Apple iPadOS | =17.0 | |
| Apple iPhone OS | =17.0 | |
Remedy
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
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Reference Links
- https://support.apple.com/en-us/HT213926 (Advisory)
- https://support.apple.com/en-us/HT213928 (Advisory)
- https://support.apple.com/en-us/HT213931 (Advisory)
- https://support.apple.com/en-us/HT213929 (Advisory)
- https://support.apple.com/en-us/HT213927 (Advisory)
- http://seclists.org/fulldisclosure/2023/Oct/5
- https://support.apple.com/en-us/HT213926,
- https://support.apple.com/en-us/HT213927,
- https://support.apple.com/en-us/HT213928,
- https://support.apple.com/en-us/HT213929,
- https://nvd.nist.gov/vuln/detail/CVE-2023-41991
Peer vulnerabilities
(Found alongside the following vulnerabilities)
- CVE-2023-41992
- CVE-2023-41991
- CVE-2023-41993
- CVE-2023-40412
- CVE-2023-40409
- CVE-2023-41071
- CVE-2023-40410
- CVE-2023-38612
- CVE-2023-41232
- CVE-2023-40406
- CVE-2023-40420
- CVE-2023-41984
- CVE-2023-41981
- CVE-2023-41073
- CVE-2023-40454
- CVE-2023-40403
- CVE-2023-40427
- CVE-2023-41063
- CVE-2023-40452
- CVE-2023-41996
- CVE-2023-41070
- CVE-2023-41968
- CVE-2023-40448
- CVE-2023-40438
- CVE-2023-40395
- CVE-2023-41068
- CVE-2023-40401
- CVE-2023-35990
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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- version/apple ipados/17.0
- version/apple iphone os/17.0
- canonical/apple multiple products