CVEs / CVE-2023-41991
CVE-2023-41991: Apple Multiple Products Improper Certificate Validation Vulnerability
- Known exploited in the CISA KEV catalog since 25 Sep 2023
- medium 5.5 CVSS 3.1 (NVD)
- EPSS 13.3% chance of exploitation in the next 30 days, higher than 96% of CVEs (30 Oct 2026)
- Last changed at its sources
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Summary
Apple iOS, iPadOS, macOS, and watchOS contain an improper certificate validation vulnerability that can allow a malicious app to bypass signature validation.
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 and fixed versions
| Product | Affected | Fixed in |
|---|---|---|
| Apple iOS and iPadOS | from unspecified, before 16.7 | 16.7 |
| Apple macOS | from unspecified, before 13.6 | 13.6 |
Exploitation
| In CISA KEV since | 25 Sep 2023 |
|---|---|
| Due date for US federal agencies | 16 Oct 2023 |
| Used in ransomware campaigns | Unknown |
| Required action | Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable. |
Severity
| CVSS 3.1 | 5.5 mediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:NScored by NVD |
|---|---|
| Weakness | CWE-295 |
References
- CVE-2023-41991 on NVD
- CVE-2023-41991 in the CISA KEV catalog
- https://support.apple.com/en-us/HT213926 (cited by CISA)
- https://support.apple.com/en-us/HT213927 (cited by CISA)
- https://support.apple.com/en-us/HT213928 (cited by CISA)
- https://support.apple.com/en-us/HT213929 (cited by CISA)
- https://support.apple.com/en-us/HT213931 (cited by CISA)
- https://support.apple.com/en-us/HT213927 Vendor Advisory
- https://support.apple.com/en-us/HT213931 Vendor Advisory
- https://support.apple.com/kb/HT213927 Vendor Advisory
- https://support.apple.com/kb/HT213931 Vendor Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-41991 US Government Resource
Sources
Exploitation status from the CISA Known Exploited Vulnerabilities catalog. EPSS scores from FIRST. Descriptions, severity and references from the National Vulnerability Database. Open-source package versions from OSV (CC-BY 4.0). Text is shown as each source states it; Stackurity does not edit it. Check the vendor's advisory before acting.
This product uses data from the NVD API but is not endorsed or certified by the NVD.