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Ubuntu Security Notice USN-4942-1
May 10, 2021
firefox vulnerability
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A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 21.04
- Ubuntu 20.10
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS
Summary:
Firefox could be made to crash or run programs as your login if it
opened a malicious website.
Software Description:
- firefox: Mozilla Open Source web browser
Details:
A race condition was discovered in Web Render Components. If a user were
tricked into opening a specially crafted website, an attacker could
potentially exploit this to execute arbitrary code.
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 21.04:
firefox 88.0.1+build1-0ubuntu0.21.04.2
Ubuntu 20.10:
firefox 88.0.1+build1-0ubuntu0.20.10.2
Ubuntu 20.04 LTS:
firefox 88.0.1+build1-0ubuntu0.20.04.2
Ubuntu 18.04 LTS:
firefox 88.0.1+build1-0ubuntu0.18.04.2
After a standard system update you need to restart Firefox to make
all the necessary changes.
References:
https://ubuntu.com/security/notices/USN-4942-1
CVE-2021-29952
Package Information:
https://launchpad.net/ubuntu/+source/firefox/88.0.1+build1-0ubuntu0.21.04.2
https://launchpad.net/ubuntu/+source/firefox/88.0.1+build1-0ubuntu0.20.10.2
https://launchpad.net/ubuntu/+source/firefox/88.0.1+build1-0ubuntu0.20.04.2
https://launchpad.net/ubuntu/+source/firefox/88.0.1+build1-0ubuntu0.18.04.2
