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Ubuntu Security Notice USN-4443-1

Ubuntu Security Notice USN-4443-1
Posted Jul 30, 2020
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4443-1 - 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, bypass iframe sandbox restrictions, confuse the user, or execute arbitrary code. It was discovered that redirected HTTP requests which are observed or modified through a web extension could bypass existing CORS checks. If a user were tricked in to installing a specially crafted extension, an attacker could potentially exploit this to obtain sensitive information across origins. Various other issues were also addressed.

tags | advisory, web, denial of service, arbitrary
systems | linux, ubuntu
advisories | CVE-2020-15652, CVE-2020-15653, CVE-2020-15654, CVE-2020-15655, CVE-2020-15656, CVE-2020-15659, CVE-2020-6514
MD5 | d80178008eece3baac547d3e0382ff43

Ubuntu Security Notice USN-4443-1

Change Mirror Download
==========================================================================
Ubuntu Security Notice USN-4443-1
July 29, 2020

firefox vulnerabilities
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS
- Ubuntu 16.04 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:

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, bypass iframe sandbox restrictions, confuse the user, or
execute arbitrary code. (CVE-2020-6463, CVE-2020-6514, CVE-2020-15652,
CVE-2020-15653, CVE-2020-15654, CVE-2020-15656, CVE-2020-15658,
CVE-2020-15659)

It was discovered that redirected HTTP requests which are observed or
modified through a web extension could bypass existing CORS checks. If a
user were tricked in to installing a specially crafted extension, an
attacker could potentially exploit this to obtain sensitive information
across origins. (CVE-2020-15655)

Update instructions:

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

Ubuntu 20.04 LTS:
firefox 79.0+build1-0ubuntu0.20.04.1

Ubuntu 18.04 LTS:
firefox 79.0+build1-0ubuntu0.18.04.1

Ubuntu 16.04 LTS:
firefox 79.0+build1-0ubuntu0.16.04.2

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

References:
https://usn.ubuntu.com/4443-1
CVE-2020-15652, CVE-2020-15653, CVE-2020-15654, CVE-2020-15655,
CVE-2020-15656, CVE-2020-15658, CVE-2020-15659, CVE-2020-6463,
CVE-2020-6514

Package Information:
https://launchpad.net/ubuntu/+source/firefox/79.0+build1-0ubuntu0.20.04.1
https://launchpad.net/ubuntu/+source/firefox/79.0+build1-0ubuntu0.18.04.1
https://launchpad.net/ubuntu/+source/firefox/79.0+build1-0ubuntu0.16.04.2
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