1. Ubuntu Security Notices
  2. USN-5011-1

USN-5011-1: Firefox vulnerabilities

Publication date

16 July 2021

Overview

Firefox could be made to crash or run programs as your login if it opened a malicious website.

Releases

Packages

  • firefox - Mozilla Open Source web browser

Details

Multiple security issues were discovered in Firefox. If a user were
tricked into opening a specially crafted website, an attacker could
potentially exploit these to cause a denial of service, overlay text
over another domain, or execute arbitrary code.

Multiple security issues were discovered in Firefox. If a user were
tricked into opening a specially crafted website, an attacker could
potentially exploit these to cause a denial of service, overlay text
over another domain, or execute arbitrary code.

Update instructions

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

Learn more about how to get the fixes.

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

Ubuntu Release Package Version
21.04 hirsute firefox –  90.0+build1-0ubuntu0.21.04.1
20.10 groovy firefox –  90.0+build1-0ubuntu0.20.10.1
20.04 focal firefox –  90.0+build1-0ubuntu0.20.04.1
18.04 bionic firefox –  90.0+build1-0ubuntu0.18.04.1

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References

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