Apple watchOS up to 7.6.2 Accessory Manager memory allocation

CVSS Meta Temp Score
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CTI Interest Score
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7.5$0-$5k0.00

Summaryinfo

A vulnerability was found in Apple watchOS up to 7.6.2. It has been classified as critical. This affects an unknown function of the component Accessory Manager. The manipulation leads to memory allocation. This vulnerability is referenced as CVE-2021-30837. The attack can only be performed from a local environment. No exploit is available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Apple watchOS up to 7.6.2 (Smartwatch Operating System). This issue affects an unknown code block of the component Accessory Manager. The manipulation with an unknown input leads to a memory allocation vulnerability. Using CWE to declare the problem leads to CWE-789. The product allocates memory based on an untrusted, large size value, but it does not ensure that the size is within expected limits, allowing arbitrary amounts of memory to be allocated. Impacted is confidentiality, integrity, and availability.

The weakness was published 09/20/2021 as HT212819 as confirmed advisory (Website). The advisory is shared at support.apple.com. The identification of this vulnerability is CVE-2021-30837. Neither technical details nor an exploit are publicly available. The advisory points out:

An application may be able to execute arbitrary code with kernel privileges

Upgrading to version 8.0 eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability. The advisory contains the following remark:

A memory consumption issue was addressed with improved memory handling.

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Productinfo

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Version

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Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.8
VulDB Meta Temp Score: 7.5

VulDB Base Score: 7.8
VulDB Temp Score: 7.5
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Memory allocation
CWE: CWE-789 / CWE-400 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Upgrade: watchOS 8.0

Timelineinfo

04/13/2021 🔍
09/20/2021 +160 days 🔍
09/20/2021 +0 days 🔍
09/21/2021 +1 days 🔍
09/30/2021 +9 days 🔍

Sourcesinfo

Vendor: apple.com

Advisory: HT212819
Status: Confirmed

CVE: CVE-2021-30837 (🔍)
GCVE (CVE): GCVE-0-2021-30837
GCVE (VulDB): GCVE-100-183125

Entryinfo

Created: 09/21/2021 12:16
Updated: 09/30/2021 16:46
Changes: 09/21/2021 12:16 (18), 09/21/2021 12:19 (27), 09/30/2021 16:46 (1)
Complete: 🔍
Cache ID: 216::103

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