Actively exploited · Published Sep 21, 2023 · Assigned by apple
CVE-2023-41991
Medium 5.5 Exploited
In plain English
A medium-severity improper certificate validation in iOS and iPadOS from Apple. Attackers are actively exploiting it in the wild (listed by CISA on September 25, 2023). The chance it is exploited in the next 30 days is estimated at 13.4% (higher than 96% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code. Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
CISA guidance
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Federal agencies must remediate by Oct 16, 2023.
Official description
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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Apple | iOS and iPadOS | unspecified – before 16.7 |
| Apple | macOS | unspecified – before 13.6 |
Weakness: CWE-295 · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N