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 2023-07-01 or later address all applicable issues in the July 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 2023-07-01 patch level. We encourage all customers to accept these updates to their devices.
Announcements
- In addition to the security vulnerabilities described in the July 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-2022-42536 | A-258698524 | High | Secure Monitor |
| CVE-2022-42537 | A-258699189 | High | Secure Monitor |
| CVE-2022-42541 | A-258698507 | High | Secure Monitor |
| CVE-2022-42538 | A-258698938 | High | Secure Monitor |
| CVE-2022-42540 | A-258699554 | High | Secure Monitor |
| CVE-2022-42539 | A-258699550 | High | Secure Monitor |
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
The Chromecast Security Team would like to thank the following people and parties for helping to improve Chromecast security.
| Researchers | CVEs |
|---|---|
| Federico Menarini of the Apple Media Products Redteam | CVE-2022-42536,CVE-2022-42537,CVE-2022-42541,CVE-2022-42538,CVE-2022-42540,CVE-2022-42539 |
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 2023-07-01 or later address all issues associated with the 2023-07-01 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 | September 25, 2023 | |
| 1.1 | September 29, 2023 | Added AMLogic CVEs |