N/A - USN-4323-1

Executive Summary

Summary
Title	Firefox vulnerabilities

Informations
Name	USN-4323-1	First vendor Publication	2020-04-07
Vendor	Ubuntu	Last vendor Modification	2020-04-07
Severity (Vendor)	N/A	Revision	N/A

Security-Database Scoring CVSS v3

Cvss vector : N/A
Overall CVSS Score	NA
Base Score	NA	Environmental Score	NA
impact SubScore	NA	Temporal Score	NA
Exploitabality Sub Score	NA

Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector :
Cvss Base Score	N/A	Attack Range	N/A
Cvss Impact Score	N/A	Attack Complexity	N/A
Cvss Expoit Score	N/A	Authentication	N/A
Calculate full CVSS 2.0 Vectors scores

Detail

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

- 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, obtain sensitive information, or execute arbitrary code. (CVE-2020-6821, CVE-2020-6822, CVE-2020-6824, CVE-2020-6825, CVE-2020-6826)

It was discovered that extensions could obtain auth codes from OAuth login flows in some circumstances. If a user were tricked in to installing a specially crafted extension, an attacker could potentially exploit this to obtain access to the user's account. (CVE-2020-6823)

Update instructions:

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

Ubuntu 19.10:
firefox 75.0+build3-0ubuntu0.19.10.1

Ubuntu 18.04 LTS:
firefox 75.0+build3-0ubuntu0.18.04.1

Ubuntu 16.04 LTS:
firefox 75.0+build3-0ubuntu0.16.04.1

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

References:
https://usn.ubuntu.com/4323-1
CVE-2020-6821, CVE-2020-6822, CVE-2020-6823, CVE-2020-6824,
CVE-2020-6825, CVE-2020-6826

Package Information:
https://launchpad.net/ubuntu/+source/firefox/75.0+build3-0ubuntu0.19.10.1
https://launchpad.net/ubuntu/+source/firefox/75.0+build3-0ubuntu0.18.04.1
https://launchpad.net/ubuntu/+source/firefox/75.0+build3-0ubuntu0.16.04.1