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September 5, 2022
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14 New 0-Day Vulnerabilities in Chrome OS – Update Your Chrome OS ASAP
There is an advisory from Google for those who have been using Chrome OS. In the advisory, Google mentioned 14 new 0-day vulnerabilities in Chrome OS and asked users to upgrade the operating system as soon as possible.
Google has fixed these vulnerabilities by rolling out an update on the 31st of August. Well, the company hasn’t notified any traces of active exploitation in the wild. The advisory has a list of 14 vulnerabilities, of which 4 are identified as high, and the remaining 10 are medium in severity. The reported vulnerabilities would be abused to carry out arbitrary code execution and denial of service attacks on the vulnerable version of Chrome OS by remote attackers.
List 14 New 0-Day Vulnerabilities in Chrome OS
In the update Google shared, it has fixed these 14 0-day vulnerabilities in Chrome OS, of which 4 is High, and the remaining 10 are Medium in severity. Please see the list as under. Successful exploitation could lead to arbitrary code execution and denial of service attacks on the vulnerable version of ChromeOS by remote attackers.
CVE-2022-2857: It is a High severity vulnerability in Blink
CVE-2022-2998: It is a High severity vulnerability in Browser Creation
CVE-2022-2607: It is a High severity vulnerability in WebUI
CVE-2022-2606: It is a High severity vulnerability in Managed devices API
CVE-2022-2859: It is a Medium severity vulnerability in Chrome OS Shell
CVE-2022-2860: It is a Medium severity vulnerability due to insufficient policy enforcement in Cookies.
CVE-2022-2861: It is a Medium severity vulnerability due to inappropriate implementation in Extensions API
CVE-2022-2624: It is a Medium severity Heap buffer overflow vulnerability in PDF
CVE-2022-2614: It is a Medium severity vulnerability in Sign-In Flow
CVE-2022-2621: It is a Medium severity vulnerability in Extensions
CVE-2022-2612: It is a Medium severity Side-channel information leakage vulnerability in Keyboard input
CVE-2022-2620: It is a Medium severity vulnerability in WebUI
CVE-2022-2615: It is a Medium severity vulnerability due to insufficient policy enforcement in Cookies
CVE-2022-2617: It is a Medium severity vulnerability in Extensions API
Chrome OS Versions Affected by These 0-Day Vulnerabilities
It’s been said that all the LTS versions prior to 96.0..4664.219 (Platform Version: 14268.104.0).
How to Fix These 0-Day Vulnerabilities in Chrome OS?
Google responded and released updates on 31st August to fix all the 14 New 0-Day Vulnerabilities in Chrome OS. All the Chrome OS users are suggested to upgrade to v96.0..4664.219 (Platform Version: 14268.104.0). Please refer to the security advisory by Google.
How to Upgrade Chrome OS?
Well, Chrome OS is designed to fetch upgrades by itself. Most of the time, auto-upgrade will work. Your Chrome OS didn’t receive upgrades for any reason, and you will have to kick start the process manually. Then you can follow any one of the methods shown here.
Method 1: Manual Upgrade From Settings
Click on the Settings icon on the Task Bar.
Choose the ‘About Chrome OS‘.
Click on ‘Check for Updates‘. The upgrade process will get started if your OS is connected to the internet.
For some reason, if auto-upgrade didn’t get fired up. Follow the Method 2.
Method 2: Upgrade Using Brunch Framework
Step 1. Open Terminal
Click Crtl + Alt + T and keys together to open Crosh Shell.
Step 2. Open shell
Enter ‘shell‘ command to open the shell.
Step 3. Download brcr-update
Use this curl command to download brcr-update as shone here:
$ curl -L -o – https://git.io/JLh1V | sudo bash
Step 4. Update brcr-update
Run this command. That’s it.
$ brcr-update
Method 3: Manually Update Brunch and Chrome OS Together
Download the latest Brunch release and the latest recovery matching your install and extract the bin.
Click Crtl + Alt + T and keys together to open Crosh Shell.
Update the Brunch using the following command:
$ sudo chromeos-update -r ~/Downloads/<path to recovery filw> -f ~/Downloads/<path of brunch archive file>
4. Restart the Chrome OS.
Method 4: Upgrade Only Chrome Os Skipping Brunch Framework
This is the easiest way to upgrade the Chrome OS. All you need to do enable_updates framework option, then carry out the upgradation from the ‘Settings’ as shown in Method 1. This is not the recommended method.
Click Crtl + Alt + T and keys together to open Crosh Shell.
Open the Brunch Configuration Menu using the below command:
$ sudo edit-brunch-config3. Add enable_updates as shone in the picture. Save the changes.
Reboot the Chrome OS.
Click on the Settings icon on the TaskBar.
Choose the ‘About Chrome OS‘.
Click on ‘Check for Updates‘. The upgrade process will get started if your OS is connected to the internet.
Watch this video created by
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Source:
We hope this post would help you know how to patch the 14 new 0-day vulnerabilities in Chrome OS. Please share this post if you find this interested. Visit our social media page on Facebook, LinkedIn, Twitter, Telegram, Tumblr, Medium & Instagram, and subscribe to receive updates like this.
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Arun KL
Arun KL is a cybersecurity professional with 15+ years of experience in IT infrastructure, cloud security, vulnerability management, Penetration Testing, security operations, and incident response. He is adept at designing and implementing robust security solutions to safeguard systems and data. Arun holds multiple industry certifications including CCNA, CCNA Security, RHCE, CEH, and AWS Security.
