Out-of-bounds Read in Apple iOS And Ipados
CVE-2021-1791
An out-of-bounds read issue existed that led to the disclosure of kernel memory. This was addressed with improved input validation. This issue is fixed in macOS Big Sur 11.2, Security Update 2021-001 Catalina, Security Update 2021-001 Mojave, watchOS 7.3, tvOS 14.4, iOS 14.4 and iPadOS 14.4. A malicious application may be able to disclose kernel memory.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.012 (67.2th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 67th percentile — 67.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.012 · newest: 0.012 · change: 0.000
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
Weakness classification (CWE)
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)
Frequently asked questions
- What is CVE-2021-1791?
- CVE-2021-1791 is a medium-severity vulnerability in Apple iOS And Ipados, classified under Out-of-bounds Read. CVSS score: 5.5/10. Published 2021-04-02.
- How severe is CVE-2021-1791?
- Medium severity. CVSS v3 base score is 5.5 out of 10.
- Is CVE-2021-1791 known to be exploited?
- 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.