CVE-2020-35111 Affecting firefox package, versions <84.0+build3-0ubuntu2


Severity

Recommended
low

Based on Ubuntu security rating.

Threat Intelligence

EPSS
0.17% (55th percentile)

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  • Snyk IDSNYK-UBUNTU2104-FIREFOX-1258416
  • published16 Dec 2020
  • disclosed7 Jan 2021

Introduced: 16 Dec 2020

CVE-2020-35111  (opens in a new tab)

How to fix?

Upgrade Ubuntu:21.04 firefox to version 84.0+build3-0ubuntu2 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream firefox package and not the firefox package as distributed by Ubuntu. See How to fix? for Ubuntu:21.04 relevant fixed versions and status.

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.

CVSS Scores

version 3.1