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Ubuntu 20.04, 18.04, 16.04: USN-4546-1 Critical Firefox Issue

ubuntu
Calendar Grey September 28, 2020
Dist Ubuntu Esm H88
Multiple vulnerabilities found in Mozilla Firefox may cause crashes or allow harmful code execution from malicious websites. Update now to ensure your safety
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, conduct cross-site

scripting (XSS) attacks, spoof the site displayed in the download dialog,

or execute arbitrary code.

Topics%20covered

Topics Covered

security advisory denial of service update XSS firefox ubuntu malicious website

Update Instructions

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

Ubuntu 20.04 LTS:
  firefox                         81.0+build2-0ubuntu0.20.04.1

Ubuntu 18.04 LTS:
  firefox                         81.0+build2-0ubuntu0.18.04.1

Ubuntu 16.04 LTS:
  firefox                         81.0+build2-0ubuntu0.16.04.1

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

References

https://ubuntu.com/security/notices/USN-4546-1

CVE-2020-15673, CVE-2020-15674, CVE-2020-15675, CVE-2020-15676,

CVE-2020-15677, CVE-2020-15678

Severity
critical
Lowest
Low
Medium
High
Critical

September 28, 2020

Topics%20covered

Topics Covered

security advisory denial of service update XSS firefox ubuntu malicious website

Package Information

https://launchpad.net/ubuntu/+source/firefox/81.0+build2-0ubuntu0.20.04.1
https://launchpad.net/ubuntu/+source/firefox/81.0+build2-0ubuntu0.18.04.1
https://launchpad.net/ubuntu/+source/firefox/81.0+build2-0ubuntu0.16.04.1

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