Origin Validation Error Affecting firefox package, versions <94.0-1


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
0.08% (38th percentile)

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  • Snyk IDSNYK-DEBIANUNSTABLE-FIREFOX-2313659
  • published9 Dec 2021
  • disclosed8 Dec 2021

Introduced: 8 Dec 2021

CVE-2021-43531  (opens in a new tab)
CWE-346  (opens in a new tab)

How to fix?

Upgrade Debian:unstable firefox to version 94.0-1 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.

When a user loaded a Web Extensions context menu, the Web Extension could access the post-redirect URL of the element clicked. If the Web Extension lacked the WebRequest permission for the hosts involved in the redirect, this would be a same-origin-violation leaking data the Web Extension should have access to. This was fixed to provide the pre-redirect URL. This is related to CVE-2021-43532 but in the context of Web Extensions. This vulnerability affects Firefox < 94.

CVSS Scores

version 3.1