CVEs / CVE-2021-1789
CVE-2021-1789: Apple Multiple Products Type Confusion Vulnerability
- Known exploited in the CISA KEV catalog since 4 May 2022
- high 8.8 CVSS 3.1 (NVD)
- EPSS 13.9% chance of exploitation in the next 30 days, higher than 96% of CVEs (30 Oct 2026)
- Last changed at its sources
Are you affected? Check your servers with Stackurity: it lists the software on each server and the vulnerabilities to fix first.
Check your servers with Stackurity Already using Stackurity? Search for CVE-2021-1789
Summary
A type confusion issue affecting multiple Apple products allows processing of maliciously crafted web content, leading to arbitrary code execution.
Description
A type confusion issue was addressed with improved state handling. This issue is fixed in macOS Big Sur 11.2, Security Update 2021-001 Catalina, Security Update 2021-001 Mojave, tvOS 14.4, watchOS 7.3, iOS 14.4 and iPadOS 14.4, Safari 14.0.3. Processing maliciously crafted web content may lead to arbitrary code execution.
Affected and fixed versions
| Product | Affected | Fixed in |
|---|---|---|
| Apple iOS and iPadOS | from unspecified, before 14.4 | 14.4 |
| Apple macOS | from unspecified, before 11.2 | 11.2 |
| Apple macOS | from unspecified, before 7.3 | 7.3 |
| Apple macOS | from unspecified, before 14.4 | 14.4 |
| Apple macOS | from unspecified, before 14.0 | 14.0 |
Exploitation
| In CISA KEV since | 4 May 2022 |
|---|---|
| Due date for US federal agencies | 25 May 2022 |
| Used in ransomware campaigns | Unknown |
| Required action | Apply updates per vendor instructions. |
Severity
| CVSS 3.1 | 8.8 highCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:HScored by NVD |
|---|---|
| Weakness | CWE-843 |
References
- CVE-2021-1789 on NVD
- CVE-2021-1789 in the CISA KEV catalog
- CVE-2021-1789 on OSV
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JN6ZOD62CTO54CHTMJTHVEF6R2Y532TJ/ Broken Link, Mailing List
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/L3L6ZZOU5JS7E3RFYGLP7UFLXCG7TNLU/ Broken Link, Mailing List
- https://security.gentoo.org/glsa/202104-03 Third Party Advisory
- https://support.apple.com/en-us/HT212146 Release Notes, Vendor Advisory
- https://support.apple.com/en-us/HT212147 Release Notes, Vendor Advisory
- https://support.apple.com/en-us/HT212148 Release Notes, Vendor Advisory
- https://support.apple.com/en-us/HT212149 Release Notes, Vendor Advisory
- https://support.apple.com/en-us/HT212152 Release Notes, Vendor Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-1789 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.