VYPR
← All advisories
Unrated severityNVD Advisory· Published Apr 3, 2019· Updated Aug 5, 2024

CVE-2018-4398

CVE-2018-4398

Description

An issue existed in the method for determining prime numbers. This issue was addressed by using pseudorandom bases for testing of primes. This issue affected versions prior to iOS 12.1, macOS Mojave 10.14.1, tvOS 12.1, watchOS 5.1, iTunes 12.9.1, iCloud for Windows 7.8.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

A weakness in the Miller-Rabin primality test in CoreCrypto allowed an attacker to incorrectly identify prime numbers, impacting multiple Apple platforms.

Vulnerability

A weakness existed in the Miller-Rabin primality test used by CoreCrypto, which could allow an attacker to incorrectly identify prime numbers [4]. The issue affected versions prior to iOS 12.1, macOS Mojave 10.14.1, tvOS 12.1, watchOS 5.1, iTunes 12.9.1, and iCloud for Windows 7.8.

Exploitation

An attacker could exploit this by influencing cryptographic operations that rely on correct prime generation. No explicit user interaction is required; the bug is in the library code.

Impact

Successful exploitation could lead to the misidentification of composite numbers as primes, potentially undermining cryptographic security, such as allowing signature forgery or decryption [4].

Mitigation

Apple addressed the issue by using pseudorandom bases for prime testing, implemented in updates released October 30, 2018 for the affected platforms. No workarounds are available.

References
  1. About the security content of tvOS 12.1 - Apple Support

AI Insight generated on May 26, 2026. Synthesized from this CVE's description and the cited reference URLs; citations are validated against the source bundle.

Affected products

3

Patches

0

No patches discovered yet.

Vulnerability mechanics

AI mechanics synthesis has not run for this CVE yet.

References

6

News mentions

0

No linked articles in our index yet.