CVE-2021-30663

CVE Published	2021-09-08
Related CWE(s)	CWE-190: Integer Overflow or Wraparound
Related Vendor(s)	apple
Related Product(s)	ipados, iphone_os, macos, tvos, safari
Exploitation Reported (CISA KEV)	2021-11-03
CVSS 3 Base Score	8.8 (HIGH)
CVSS 3 Attack Complexity	LOW
CVSS 3 Attack Vector	NETWORK

An integer overflow was addressed with improved input validation. This issue is fixed in iOS 14.5.1 and iPadOS 14.5.1, tvOS 14.6, iOS 12.5.3, Safari 14.1.1, macOS Big Sur 11.3.1. Processing maliciously crafted web content may lead to arbitrary code execution.

Cyber Threat Graph Context

Explore how this CVE relates to the wider threat graph

Associated CAPEC Patterns

Forced Integer Overflow (CAPEC-92)

This attack forces an integer variable to go out of range. The integer variable is often used as an offset such as size of memory allocation or similarly. The attacker would typically control the value of such variable and try to get it out of range. For instance the integer in question is incremented past the maximum possible value, it may wrap to become a very small, or negative number, therefore providing a very incorrect value which can lead to unexpected behavior. At worst the attacker can execute arbitrary code.

References

CVE-2021-30663

Cyber Threat Graph Context

Associated CAPEC Patterns

Forced Integer Overflow (CAPEC-92)

References

CVE.org

NIST National Vulnerability Database

CISA Known Exploited Vulnerabilities