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Ubuntu 21.10: USN-5434-1 Critical: Firefox Privileged Execution Risk

ubuntu
Calendar Grey May 23, 2022
Dist Ubuntu Esm H88
The Ubuntu Security Notice USN-5435-2 highlights critical vulnerabilities within Thunderbird, which may cause severe data exposure threats.
Firefox could be made to execute JavaScript in a privileged context if it opened a malicious website.

Summary

Firefox could be made to execute JavaScript in a privileged context if it

opened a malicious website.

Software Description:

- firefox: Mozilla Open Source web browser

Details:

It was discovered that the methods of an Array object could be corrupted

as a result of prototype pollution by sending a message to the parent

process. If a user were tricked into opening a specially crafted website,

an attacker could exploit this to execute JavaScript in a privileged

context.

Topics%20covered

Topics Covered

security advisory critical firefox ubuntu privileged execution

Update Instructions

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 21.10:
  firefox                         100.0.2+build1-0ubuntu0.21.10.1

Ubuntu 20.04 LTS:
  firefox                         100.0.2+build1-0ubuntu0.20.04.1

Ubuntu 18.04 LTS:
  firefox                         100.0.2+build1-0ubuntu0.18.04.1

After a standard system update you need to restart Firefox to make
all the necessary changes.

References

https://ubuntu.com/security/notices/USN-5434-1

CVE-2022-1529, CVE-2022-1802

Severity
critical
Lowest
Low
Medium
High
Critical

May 23, 2022

Topics%20covered

Topics Covered

security advisory critical firefox ubuntu privileged execution

Package Information

https://launchpad.net/ubuntu/+source/firefox/100.0.2+build1-0ubuntu0.21.10.1
https://launchpad.net/ubuntu/+source/firefox/100.0.2+build1-0ubuntu0.20.04.1
https://launchpad.net/ubuntu/+source/firefox/100.0.2+build1-0ubuntu0.18.04.1

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