Ubuntu 20.04 LTS: USN-4383-1 Critical: Firefox Denial Of Service

ubuntu

June 4, 2020

Firefox could be made to crash or run programs as your login if it opened a malicious website.

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)

Topics Covered

security advisory denial of service firefox ubuntu program execution crash malicious website

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.