An integer overflow was addressed through improved input validation. This issue is fixed in macOS Big Sur 11.0.1, watchOS 7.1, iOS 14.2 and iPadOS 14.2, iCloud for Windows 11.5, tvOS 14.2, iTunes 12.11 for Windows. A remote attacker may be able to cause unexpected application termination or arbitrary code execution.
The product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.
| Link | Tags |
|---|---|
| https://support.apple.com/en-us/HT211931 | vendor advisory |
| https://support.apple.com/en-us/HT211935 | vendor advisory |
| https://support.apple.com/en-us/HT211928 | vendor advisory |
| https://support.apple.com/en-us/HT211929 | vendor advisory |
| https://support.apple.com/en-us/HT211930 | vendor advisory |
| https://support.apple.com/en-us/HT211933 | vendor advisory |
| https://support.apple.com/kb/HT212011 | vendor advisory |
| http://seclists.org/fulldisclosure/2020/Dec/32 | third party advisory mailing list |
| http://seclists.org/fulldisclosure/2020/Dec/26 | third party advisory mailing list |