Advisory Published

USN-4353-1: Firefox vulnerabilities

First published: Thu May 07 2020(Updated: )

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, bypass security restrictions, spoof the URL bar, or execute arbitrary code. (CVE-2020-6831, CVE-2020-12387, CVE-2020-12390, CVE-2020-12391, CVE-2020-12394, CVE-2020-12395, CVE-2020-12396) It was discovered that the Devtools’ ‘Copy as cURL’ feature did not properly escape the HTTP POST data of a request. If a user were tricked in to using the ‘Copy as cURL’ feature to copy and paste a command with specially crafted data in to a terminal, an attacker could potentially exploit this to obtain sensitive information from local files. (CVE-2020-12392)

Affected SoftwareAffected VersionHow to fix
All of
ubuntu/firefox<76.0+build2-0ubuntu0.20.04.1
76.0+build2-0ubuntu0.20.04.1
=20.04
All of
ubuntu/firefox<76.0+build2-0ubuntu0.19.10.1
76.0+build2-0ubuntu0.19.10.1
=19.10
All of
ubuntu/firefox<76.0+build2-0ubuntu0.18.04.1
76.0+build2-0ubuntu0.18.04.1
=18.04
All of
ubuntu/firefox<76.0+build2-0ubuntu0.16.04.1
76.0+build2-0ubuntu0.16.04.1
=16.04

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