High severity · published Sep 8, 2021
CVE-2021-30743
An out-of-bounds write was addressed with improved input validation
7.8
CVSS
1.2%
EPSS
No
On KEV
Description
An out-of-bounds write was addressed with improved input validation. This issue is fixed in iOS 14.5 and iPadOS 14.5, watchOS 7.4, Security Update 2021-003 Catalina, tvOS 14.5, macOS Big Sur 11.3. Processing a maliciously crafted image may lead to arbitrary code execution.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Attack vector
Local
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.2% · higher than 68% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
IO
iOS · Apple
before 14.5 · source: NVD
MA
macOS · Apple
11.0.1 before 11.3 · source: NVD
MO
Mac OS X · Apple
10.15; 10.15.1; 10.15.2; 10.15.3; 10.15.4; 10.15.5; +12 more · source: NVD
TV
Tvos · Apple
before 14.5 · source: NVD
WA
Watchos · Apple
before 7.4 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-30743
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-30743
Vendor Advisory
https://support.apple.com/en-us/HT212317
Vendor Advisory
https://support.apple.com/en-us/HT212323
Vendor Advisory
https://support.apple.com/en-us/HT212324
Vendor Advisory
https://support.apple.com/en-us/HT212325
Vendor Advisory
https://support.apple.com/en-us/HT212530
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