Exposure of Resource to Wrong Sphere Affecting firefox package, versions <87.0-1


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
0.31% (71st percentile)

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  • Snyk IDSNYK-DEBIANUNSTABLE-FIREFOX-1088407
  • published24 Mar 2021
  • disclosed31 Mar 2021

Introduced: 24 Mar 2021

CVE-2021-23985  (opens in a new tab)
CWE-668  (opens in a new tab)

How to fix?

Upgrade Debian:unstable firefox to version 87.0-1 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 Debian. See How to fix? for Debian:unstable relevant fixed versions and status.

If an attacker is able to alter specific about:config values (for example malware running on the user's computer), the Devtools remote debugging feature could have been enabled in a way that was unnoticable to the user. This would have allowed a remote attacker (able to make a direct network connection to the victim) to monitor the user's browsing activity and (plaintext) network traffic. This was addressed by providing a visual cue when Devtools has an open network socket. This vulnerability affects Firefox < 87.

CVSS Scores

version 3.1