Chromecast Security Bulletin—December 2023

Published December 5, 2023

The Chromecast Security Bulletin contains details of security vulnerabilities affecting supported Chromecast with Google TV devices (Chromecast devices). For Chromecast devices, security patch levels of 2023-10-01 or later address all applicable issues in the October 2023 Android Security Bulletin and all issues in this bulletin. To learn how to check a device's security patch level, see Chromecast firmware versions & release notes.

All supported Chromecast devices will receive an update to the 2023-10-01 patch level. We encourage all customers to accept these updates to their devices.

Announcements

  • In addition to the security vulnerabilities described in the October 2023 Android Security Bulletin, Chromecast devices also contain patches for the security vulnerabilities described below.

Security patches

Vulnerabilities are grouped under the component that they affect. There is a description of the issue and a table with the CVE, associated references, type of vulnerability, severity, and updated Android Open Source Project (AOSP) versions (where applicable). When available, we link the public change that addressed the issue to the bug ID, like the AOSP change list. When multiple changes relate to a single bug, additional references are linked to numbers following the bug ID.

AMLogic

CVE References Severity Subcomponent
CVE-2023-48425
A-291138519 High U-Boot
CVE-2023-48424
A-286458481 High U-Boot
CVE-2023-6181
A-291138116 Moderate U-Boot

System

CVE References Severity Subcomponent
CVE-2023-48417
A-288311233 Moderate KeyChain

Functional patches

For details on the new bug fixes and functional patches included in this release, refer to the Chromecast firmware versions & release notes.

Acknowledgements

Researchers CVEs
Nolen Johnson, DirectDefense and Jan Altensen, Ray Volpe CVE-2023-6181, CVE-2023-48425,
Lennert Wouters, rqu, Thomas Roth aka stacksmashing CVE-2023-48424
Rocco Calvi (TecR0c), SickCodes CVE-2023-48417

Common questions and answers

This section answers common questions that may occur after reading this bulletin.

1. How do I determine if my device is updated to address these issues?

Security patch levels of 2023-10-01 or later address all issues associated with the 2023-10-01 security patch level and all previous patch levels. To learn how to check a device's security patch level, read the instructions on the Chromecast firmware versions & release notes.

2. Why are security vulnerabilities split between this bulletin and the Android Security Bulletins?

Security vulnerabilities that are documented in the Android Security Bulletins are required to declare the latest security patch level on Android devices. Additional security vulnerabilities, such as those documented in this bulletin are not required for declaring a security patch level.

3. What do the entries in the Type column mean?

Entries in the Type column of the vulnerability details table reference the classification of the security vulnerability.

Abbreviation Definition
RCE Remote code execution
EoP Elevation of privilege
ID Information disclosure
DoS Denial of service
N/A Classification not available

4. What do the entries in the References column mean?

Entries under the References column of the vulnerability details table may contain a prefix identifying the organization to which the reference value belongs.

Prefix Reference
A- Android bug ID

5. What does an * next to the Android bug ID in the References column mean?

Issues that are not publicly available have an * next to the Android bug ID in the References column.

Versions

Version Date Notes
1.0 December 5, 2023