Race Condition Affecting firefox-esr package, versions <68.2.0esr-1~deb8u1


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
0.3% (71st percentile)

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  • Snyk IDSNYK-DEBIAN8-FIREFOXESR-474064
  • 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 Debian:8 firefox-esr to version 68.2.0esr-1~deb8u1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream firefox-esr package and not the firefox-esr package as distributed by Debian. See How to fix? for Debian:8 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