Multiple security issues were discovered in Firefox. If a user were
tricked into opening a specially crafted website, an attacker could
potentially exploit these to cause a denial of service, obtain sensitive
information, bypass the CSS sanitizer, bypass security restrictions,
spoof the URL bar, or execute arbitrary code. (CVE-2020-16042,
CVE-2020-26971, CVE-2020-26972, CVE-2020-26793, CVE-2020-26974,
CVE-2020-26976, CVE-2020-26978, CVE-2020-26979,
CVE-2020-35113, CVE-2020-35114)
It was discovered that the proxy.onRequest API did not catch
view-source URLs. If a user were tricked in to installing an
extension with the proxy permission and opening View Source, an
attacker could potentially exploit this to obtain sensitive
information. (CVE-2020-35111)
ubuntu.com/security/CVE-2020-16042
ubuntu.com/security/CVE-2020-26971
ubuntu.com/security/CVE-2020-26972
ubuntu.com/security/CVE-2020-26973
ubuntu.com/security/CVE-2020-26974
ubuntu.com/security/CVE-2020-26976
ubuntu.com/security/CVE-2020-26978
ubuntu.com/security/CVE-2020-26979
ubuntu.com/security/CVE-2020-35111
ubuntu.com/security/CVE-2020-35113
ubuntu.com/security/CVE-2020-35114
ubuntu.com/security/notices/USN-4671-1