USN-4637-2: Firefox vulnerabilities

Releases

• Ubuntu 16.04 ESM

Packages

• firefox - Mozilla Open Source web browser

Details

USN-4637-1 fixed vulnerabilities in Firefox. This update provides the
corresponding updates for Ubuntu 16.04 LTS.

Original advisory details:

Multiple security issues were discovered in Firefox. If a user were
tricked in to opening a specially crafted website, an attacker could
potentially exploit these to cause a denial of service, obtain sensitive
information across origins, bypass security restrictions, conduct phishing
attacks, conduct cross-site scripting (XSS) attacks, bypass Content
Security Policy (CSP) restrictions, conduct DNS rebinding attacks, or
execute arbitrary code.

Update instructions

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

Ubuntu 16.04

• firefox - 83.0+build2-0ubuntu0.16.04.3

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

References

• CVE-2020-26958
• CVE-2020-26967
• CVE-2020-26963
• CVE-2020-26968
• CVE-2020-26962
• CVE-2020-26959
• CVE-2020-26951
• CVE-2020-26961
• CVE-2020-16012
• CVE-2020-26960
• CVE-2020-26969
• CVE-2020-26952
• CVE-2020-26956
• CVE-2020-26965
• CVE-2020-26953

Related notices

• USN-4637-1
• USN-4647-1