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Ubuntu: USN-4671-1 (CVE-2020-26793): Firefox vulnerabilities

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Ubuntu: USN-4671-1 (CVE-2020-26793): Firefox vulnerabilities

Severity
4
CVSS
(AV:L/AC:M/Au:N/C:P/I:P/A:P)
Published
12/15/2020
Created
12/17/2020
Added
12/16/2020
Modified
02/17/2021

Description

Details for this vulnerability have not been published by NIST at this point. Descriptions from software vendor advisories for this issue are provided below.

From USN-4671-1:

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)

Solution(s)

  • ubuntu-upgrade-firefox

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