Out-of-bounds Read in Apple iOS
CVE-2021-30789
An out-of-bounds read was addressed with improved input validation. This issue is fixed in iOS 14.7, macOS Big Sur 11.5, watchOS 7.6, tvOS 14.7, Security Update 2021-004 Catalina. Processing a maliciously crafted font file may lead to arbitrary code execution.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.012 (68.3th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 68th percentile — 68.3% 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 — versions unspecified
- Apple Iphone OS
- Apple macOS — versions unspecified
- Apple Mac OS X — versions 10.15.7
- Apple Security Update - Catalina — versions unspecified
- Apple tvOS
- Apple watchOS
Weakness classification (CWE)
References
- support.apple.com/en-us/HT212601 (Vendor Advisory)
- support.apple.com/en-us/HT212602 (Vendor Advisory)
- support.apple.com/en-us/HT212605 (Vendor Advisory)
- support.apple.com/en-us/HT212600 (Vendor Advisory)
- support.apple.com/en-us/HT212604 (Vendor Advisory)
Frequently asked questions
- What is CVE-2021-30789?
- CVE-2021-30789 is a high-severity vulnerability in Apple iOS, classified under Out-of-bounds Read. CVSS score: 7.8/10. Published 2021-09-08.
- How severe is CVE-2021-30789?
- High severity. CVSS v3 base score is 7.8 out of 10.