Rapid7 Vulnerability & Exploit Database

MFSA2020-55 Firefox: Security Vulnerabilities fixed in Firefox ESR 78.6 (CVE-2020-35111)

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MFSA2020-55 Firefox: Security Vulnerabilities fixed in Firefox ESR 78.6 (CVE-2020-35111)

Severity
4
CVSS
(AV:N/AC:M/Au:N/C:P/I:N/A:N)
Published
12/15/2020
Created
12/16/2020
Added
12/16/2020
Modified
01/14/2021

Description

When an extension with the proxy permission registered to receive <all_urls>, the proxy.onRequest callback was not triggered for view-source URLs. While web content cannot navigate to such URLs, a user opening View Source could have inadvertently leaked their IP address. This vulnerability affects Firefox < 84, Thunderbird < 78.6, and Firefox ESR < 78.6.

Solution(s)

  • mozilla-firefox-esr-upgrade-78_6

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