USN-4474-1: Firefox vulnerabilities

Releases

• Ubuntu 20.04 LTS
• Ubuntu 18.04 ESM
• Ubuntu 16.04 ESM

Packages

• firefox - Mozilla Open Source web browser

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, trick the user
in to installing a malicious extension, spoof the URL bar, leak sensitive
information between origins, or execute arbitrary code. (CVE-2020-15664,
CVE-2020-15665, CVE-2020-15666, CVE-2020-15670)

It was discovered that NSS incorrectly handled certain signatures.
An attacker could possibly use this issue to expose sensitive information.
(CVE-2020-12400, CVE-2020-12401, CVE-2020-6829)

A data race was discovered when importing certificate information in to
the trust store. An attacker could potentially exploit this to cause an
unspecified impact. (CVE-2020-15668)

Update instructions

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

Ubuntu 20.04

• firefox - 80.0+build2-0ubuntu0.20.04.1

Ubuntu 18.04

• firefox - 80.0+build2-0ubuntu0.18.04.1

Ubuntu 16.04

• firefox - 80.0+build2-0ubuntu0.16.04.1

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

References

• CVE-2020-15666
• CVE-2020-15665
• CVE-2020-15668
• CVE-2020-15670
• CVE-2020-12400
• CVE-2020-12401
• CVE-2020-15664
• CVE-2020-6829

Related notices

• USN-4455-1: libnss3-dev, libnss3-tools, libnss3-1d, nss, libnss3, libnss3-nssdb