USN-5011-1: Firefox vulnerabilities

Releases

• Ubuntu 21.04
• Ubuntu 20.10
• Ubuntu 20.04 LTS
• Ubuntu 18.04 ESM

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.

Update instructions

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

Ubuntu 21.04

• firefox - 90.0+build1-0ubuntu0.21.04.1

Ubuntu 20.10

• firefox - 90.0+build1-0ubuntu0.20.10.1

Ubuntu 20.04

• firefox - 90.0+build1-0ubuntu0.20.04.1

Ubuntu 18.04

• firefox - 90.0+build1-0ubuntu0.18.04.1

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

References

• CVE-2021-29974
• CVE-2021-29977
• CVE-2021-30547
• CVE-2021-29972
• CVE-2021-29975
• CVE-2021-29976
• CVE-2021-29970

Related notices

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