Apple watchOS up to 5.3.8/6.2.8/7.0.3 libxml2 use after free

Summaryinfo

A vulnerability identified as critical has been detected in Apple watchOS up to 5.3.8/6.2.8/7.0.3. This affects an unknown function of the component libxml2. This manipulation causes use after free. This vulnerability is registered as CVE-2020-27917. Remote exploitation of the attack is possible. No exploit is available. You should upgrade the affected component.

Detailsinfo

A vulnerability has been found in Apple watchOS up to 5.3.8/6.2.8/7.0.3 (Smartwatch Operating System) and classified as critical. Affected by this vulnerability is some unknown functionality of the component libxml2. The manipulation with an unknown input leads to a use after free vulnerability. The CWE definition for the vulnerability is CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. As an impact it is known to affect confidentiality, integrity, and availability.

The weakness was published 11/05/2020 by OSS-Fuzz as HT211928 as confirmed advisory (Website). The advisory is shared at support.apple.com. This vulnerability is known as CVE-2020-27917. The exploitation appears to be easy. 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. Neither technical details nor an exploit are publicly available. The advisory points out:

Processing maliciously crafted web content may lead to code execution

Upgrading to version 5.3.9, 6.2.9 or 7.1 eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability. The advisory contains the following remark:

A use after free issue was addressed with improved memory management.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

• Smartwatch Operating System

Vendor

• Apple

Name

• watchOS

Version

• 5.3.0
• 5.3.1
• 5.3.2
• 5.3.3
• 5.3.4
• 5.3.5
• 5.3.6
• 5.3.7
• 5.3.8
• 6.2.0
• 6.2.1
• 6.2.2
• 6.2.3
• 6.2.4
• 6.2.5
• 6.2.6
• 6.2.7
• 6.2.8
• 7.0.0
• 7.0.1
• 7.0.2
• 7.0.3

License

• commercial

Website

• Vendor: https://www.apple.com/

CPE 2.3info

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CPE 2.2info

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Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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