VDB-155860 · CVE-2020-9834 · HT211170

Apple macOS up to 10.15.4 Wi-Fi memory corruption

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.
6.3	$0-$5k	0.00

Summaryinfo

A vulnerability described as critical has been identified in Apple macOS up to 10.15.4. Affected by this issue is some unknown functionality of the component Wi-Fi. Executing a manipulation can lead to memory corruption. This vulnerability is registered as CVE-2020-9834. The attack needs to be launched locally. No exploit is available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in Apple macOS up to 10.15.4 (Operating System). It has been declared as critical. This vulnerability affects an unknown code block of the component Wi-Fi. The manipulation with an unknown input leads to a memory corruption vulnerability. The CWE definition for the vulnerability is CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

A memory corruption issue was addressed with improved input validation. This issue is fixed in macOS Catalina 10.15.5. An application may be able to execute arbitrary code with kernel privileges.

The weakness was published 05/26/2020 by Yu Wang with Didi Research America as HT211170 as confirmed advisory (Website). The advisory is shared for download at support.apple.com. This vulnerability was named CVE-2020-9834. The attack needs to be approached locally. The requirement for exploitation is a single authentication. There are neither technical details nor an exploit publicly available. The advisory points out:

A memory corruption issue was addressed with improved input validation.

Upgrading to version 10.15.5 eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability.

Similar entries are available at VDB-155817, VDB-155818, VDB-155819 and VDB-155820. Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

Operating System

Vendor

Apple

Name

macOS

Version

License

commercial

Website

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

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.5
VulDB Meta Temp Score: 6.4

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.8
NVD Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
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💳	💳	💳	💳	💳	💳
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Memory corruption
CWE: CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
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: macOS 10.15.5

Timelineinfo

03/02/2020 🔍
05/26/2020 +85 days 🔍
05/26/2020 +0 days 🔍
05/30/2020 +4 days 🔍
10/20/2020 +143 days 🔍

Sourcesinfo

Vendor: apple.com

Advisory: HT211170
Researcher: Yu Wang
Organization: Didi Research America
Status: Confirmed

CVE: CVE-2020-9834 (🔍)
GCVE (CVE): GCVE-0-2020-9834
GCVE (VulDB): GCVE-100-155860
scip Labs: https://www.scip.ch/en/?labs.20180712
See also: 🔍

Entryinfo

Created: 05/30/2020 07:49
Updated: 10/20/2020 18:31
Changes: 05/30/2020 07:49 (48), 05/30/2020 07:54 (17), 10/20/2020 18:31 (1)
Complete: 🔍
Cache ID: 216::103