Race Condition Affecting firefox package, versions <70.0+build2-0ubuntu1


Severity

Recommended
0.0
medium
0
10

Based on Ubuntu security rating.

Threat Intelligence

EPSS
0.14% (51st percentile)

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  • Snyk IDSNYK-UBUNTU2104-FIREFOX-1266127
  • published22 Oct 2019
  • disclosed8 Jan 2020

Introduced: 22 Oct 2019

CVE-2019-11761  (opens in a new tab)
CWE-362  (opens in a new tab)
CWE-862  (opens in a new tab)

How to fix?

Upgrade Ubuntu:21.04 firefox to version 70.0+build2-0ubuntu1 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.

By using a form with a data URI it was possible to gain access to the privileged JSONView object that had been cloned into content. Impact from exposing this object appears to be minimal, however it was a bypass of existing defense in depth mechanisms. This vulnerability affects Firefox < 70, Thunderbird < 68.2, and Firefox ESR < 68.2.

CVSS Scores

version 3.1