VDB-152611 · CVE-2020-3894 · HT211106

Apple iCloud up to 10.9.2 on Windows WebKit race condition

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
4.5	$0-$5k	0.00

Summaryinfo

A vulnerability marked as problematic has been reported in Apple iCloud up to 10.9.2 on Windows. This affects an unknown function of the component WebKit. This manipulation causes race condition. This vulnerability is handled as CVE-2020-3894. The attack can be initiated remotely. There is not any exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in Apple iCloud up to 10.9.2 on Windows (Cloud Software). It has been declared as critical. Affected by this vulnerability is an unknown code of the component WebKit. The manipulation with an unknown input leads to a race condition vulnerability. The CWE definition for the vulnerability is CWE-362. The product contains a code sequence that can run concurrently with other code, and the code sequence requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence that is operating concurrently. As an impact it is known to affect confidentiality, integrity, and availability.

The weakness was released 03/25/2020 by Sergei Glazunov with Google Project Zero as HT211106 as confirmed advisory (Website). It is possible to read the advisory at support.apple.com. This vulnerability is known as CVE-2020-3894. The attack can be launched remotely. The exploitation doesn't need any form of authentication. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available. The advisory points out:

A race condition was addressed with additional validation.

Upgrading to version 10.9.3 eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability.

Entries connected to this vulnerability are available at VDB-152525, VDB-152555, VDB-152581 and VDB-152598. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

Cloud Software

Vendor

Apple

Name

iCloud

Version

License

free

Website

Vendor: https://www.apple.com/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.7
VulDB Meta Temp Score: 4.6

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 3.1
NVD Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
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Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

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

NVD Base Score: 🔍

Exploitinginfo

Class: Race condition
CWE: CWE-362
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Upgrade: iCloud 10.9.3

Timelineinfo

12/18/2019 🔍
03/25/2020 +98 days 🔍
03/25/2020 +0 days 🔍
04/02/2020 +8 days 🔍
10/06/2020 +187 days 🔍

Sourcesinfo

Vendor: apple.com

Advisory: HT211106
Researcher: Sergei Glazunov
Organization: Google Project Zero
Status: Confirmed

CVE: CVE-2020-3894 (🔍)
GCVE (CVE): GCVE-0-2020-3894
GCVE (VulDB): GCVE-100-152611
See also: 🔍

Entryinfo

Created: 04/02/2020 12:02
Updated: 10/06/2020 16:50
Changes: 04/02/2020 12:02 (48), 04/02/2020 12:07 (16), 10/06/2020 16:50 (2)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.