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lundi 29 octobre 2018

Apple iCloud for Windows up to 7.7 CoreCrypto Prime Number weak encryption

A vulnerability, which was classified as critical, was found in Apple iCloud for Windows up to 7.7. Affected is an unknown function of the component CoreCrypto. The manipulation with an unknown input leads to a weak encryption vulnerability (Prime Number). CWE is classifying the issue as CWE-311. This is going to have an impact on confidentiality, integrity, and availability.

The weakness was released 10/29/2018 by Martin Albrecht, Jake Massimo, Kenny Paterson and Juraj Somorovsky as HT209198 as confirmed advisory (Website). The advisory is available at This vulnerability is traded as CVE-2018-4398. The exploitability is told to be difficult. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 10/31/2018). The advisory points out:

An issue existed in the method for determining prime numbers. This issue was addressed by using pseudorandom bases for testing of primes.

Upgrading to version 7.8 eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability.

Entries connected to this vulnerability are available at 126166, 126196, 126212 and 126232.



VulDB Meta Base Score: 4.6
VulDB Meta Temp Score: 4.4

VulDB Base Score: ≈4.6
VulDB Temp Score: ≈4.4
VulDB Vector: 🔒
VulDB Reliability: 🔍


VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍


Class: Weak encryption / Prime Number (CWE-311)
Local: Yes
Remote: No

Availability: No

Price Prediction: 🔍
Current Price Estimation: 🔒

Threat Intelligence

Threat: 🔍
Adversaries: 🔍
Geopolitics: 🔍
Economy: 🔍
Predictions: 🔍
Actions: 🔍


Recommended: Upgrade
Status: Official fix
Reaction Time: 🔒
0-Day Time: 🔒
Exposure Time: 🔒

Upgrade: iCloud for Windows 7.8


10/29/2018 Advisory disclosed
10/29/2018 Countermeasure disclosed
10/31/2018 VulDB entry created
10/31/2018 VulDB last update


Advisory: HT209198
Researcher: Martin Albrecht/Jake Massimo/Kenny Paterson/Juraj Somorovsky
Status: Confirmed

CVE: CVE-2018-4398 (🔒)
See also: 🔒


Created: 10/31/2018
Complete: 🔍

Lien vers l'article source

Auteur: VulDB

Catégories: VulDBNombre de vues: 149


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