As specified in the W3C Content Security Policy draft, when creating a violation report, "User agents need to ensure that the source file is the URL requested by the page, pre-redirects. If that’s not possible, user agents need to strip the URL down to an origin to avoid unintentional leakage." Under certain types of redirects, Firefox incorrectly set the source file to be the destination of the redirects. This was fixed to be the redirect destination's origin. This vulnerability affects Firefox < 86, Thunderbird < 78.8, and Firefox ESR < 78.8.
Advisories
Source ID Title
Debian DLA Debian DLA DLA-2575-1 firefox-esr security update
Debian DLA Debian DLA DLA-2578-1 thunderbird security update
Debian DSA Debian DSA DSA-4862-1 firefox-esr security update
Debian DSA Debian DSA DSA-4866-1 thunderbird security update
EUVD EUVD EUVD-2021-10890 As specified in the W3C Content Security Policy draft, when creating a violation report, "User agents need to ensure that the source file is the URL requested by the page, pre-redirects. If that’s not possible, user agents need to strip the URL down to an origin to avoid unintentional leakage." Under certain types of redirects, Firefox incorrectly set the source file to be the destination of the redirects. This was fixed to be the redirect destination's origin. This vulnerability affects Firefox < 86, Thunderbird < 78.8, and Firefox ESR < 78.8.
Ubuntu USN Ubuntu USN USN-4756-1 Firefox vulnerabilities
Ubuntu USN Ubuntu USN USN-4936-1 Thunderbird vulnerabilities
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

No history.

cve-icon MITRE

Status: PUBLISHED

Assigner: mozilla

Published:

Updated: 2024-08-03T19:14:09.977Z

Reserved: 2021-01-13T00:00:00

Link: CVE-2021-23969

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2021-02-26T02:15:12.947

Modified: 2024-11-21T05:52:07.350

Link: CVE-2021-23969

cve-icon Redhat

Severity : Important

Publid Date: 2021-02-23T00:00:00Z

Links: CVE-2021-23969 - Bugzilla

cve-icon OpenCVE Enrichment

No data.