Vulnerability in Apple iOS And Ipados
CVE-2021-1789
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.140 (96.5th percentile), scored .
Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 97th percentile — 96.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.145 · newest: 0.140 · change: -0.005
Affected products
- Apple iOS And Ipados — versions unspecified
- Apple Ipados
- Apple Iphone OS
- Apple macOS — versions unspecified
- Apple Mac OS X — versions 10.14.6, 10.15.7
- Apple tvOS
- Apple watchOS
- Webkitgtk
- Fedoraproject Fedora — versions 32, 33
Weakness classification (CWE)
CISA KEV (Known Exploited Vulnerabilities)
This CVE is on the CISA KEV catalog, added on . CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.
BOD 22-01 due date: .
Required action: Apply updates per vendor instructions.
Public proof-of-concept exploits
References
- support.apple.com/en-us/HT212147 (Release Notes, Vendor Advisory)
- support.apple.com/en-us/HT212146 (Release Notes, Vendor Advisory)
- support.apple.com/en-us/HT212148 (Release Notes, Vendor Advisory)
- support.apple.com/en-us/HT212149 (Release Notes, Vendor Advisory)
- support.apple.com/en-us/HT212152 (Release Notes, Vendor Advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory, Mailing List, Broken Link)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory, Mailing List, Broken Link)
- security.gentoo.org/glsa/202104-03 (vendor-advisory, Third Party Advisory)
- 134c704f-9b21-4f2e-91b3-4a467353bcc0 (US Government Resource)
Frequently asked questions
- What is CVE-2021-1789?
- CVE-2021-1789 is a high-severity vulnerability in Apple iOS And Ipados, classified under Access of Resource Using Incompatible Type (Type Confusion). CVSS score: 8.8/10. Published 2021-04-02.
- How severe is CVE-2021-1789?
- High severity. CVSS v3 base score is 8.8 out of 10.
- Is CVE-2021-1789 known to be exploited?
- Yes. CVE-2021-1789 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2022-05-04), indicating it is being actively exploited. 4 public proof-of-concept repositories are indexed.