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Ubuntu Security Notice USN-4383-1

Ubuntu Security Notice USN-4383-1
Posted Jun 5, 2020
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4383-1 - 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, spoof the addressbar, or execute arbitrary code. It was discovered that NSS showed timing differences when performing DSA signatures. An attacker could potentially exploit this to obtain private keys using a timing attack. Various other issues were also addressed.

tags | advisory, denial of service, arbitrary, spoof
systems | linux, ubuntu
advisories | CVE-2020-12399, CVE-2020-12407, CVE-2020-12408, CVE-2020-12411
MD5 | 7008565679641f0d4d2c4c80f6ec42cf

Ubuntu Security Notice USN-4383-1

Change Mirror Download
==========================================================================
Ubuntu Security Notice USN-4383-1
June 04, 2020

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

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

- Ubuntu 20.04 LTS
- Ubuntu 19.10
- 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, spoof the
addressbar, or execute arbitrary code. (CVE-2020-12405, CVE-2020-12406,
CVE-2020-12407, CVE-2020-12408, CVE-2020-12409, CVE-2020-12410,
CVE-2020-12411)

It was discovered that NSS showed timing differences when performing DSA
signatures. An attacker could potentially exploit this to obtain private
keys using a timing attack. (CVE-2020-12399)

Update instructions:

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

Ubuntu 20.04 LTS:
firefox 77.0.1+build1-0ubuntu0.20.04.1

Ubuntu 19.10:
firefox 77.0.1+build1-0ubuntu0.19.10.1

Ubuntu 18.04 LTS:
firefox 77.0.1+build1-0ubuntu0.18.04.1

Ubuntu 16.04 LTS:
firefox 77.0.1+build1-0ubuntu0.16.04.1

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

References:
https://usn.ubuntu.com/4383-1
CVE-2020-12399, CVE-2020-12405, CVE-2020-12406, CVE-2020-12407,
CVE-2020-12408, CVE-2020-12409, CVE-2020-12410, CVE-2020-12411

Package Information:

https://launchpad.net/ubuntu/+source/firefox/77.0.1+build1-0ubuntu0.20.04.1

https://launchpad.net/ubuntu/+source/firefox/77.0.1+build1-0ubuntu0.19.10.1

https://launchpad.net/ubuntu/+source/firefox/77.0.1+build1-0ubuntu0.18.04.1

https://launchpad.net/ubuntu/+source/firefox/77.0.1+build1-0ubuntu0.16.04.1
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