CVE-2021-23969

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.

CVSS v3.0 4.3 MEDIUM
CVSS v2.0 4.3 MEDIUM

4.3^/10

CVSS v3.0 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact LOW

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

4.3^/10

CVSS v2.0 : MEDIUM

Vector : AV:N/AC:M/Au:N/C:P/I:N/A:N

Exploitability : 8.6 / Impact : 2.9

Access Vector NETWORK

Access Complexity MEDIUM

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact NONE

Availability Impact NONE

References

Link	Resource
https://bugzilla.mozilla.org/show_bug.cgi?id=1542194	Issue Tracking Permissions Required Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2021-08/	Release Notes Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2021-09/	Release Notes Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2021-07/	Release Notes Vendor Advisory
https://lists.debian.org/debian-lts-announce/2021/03/msg00000.html	Mailing List Third Party Advisory
https://www.debian.org/security/2021/dsa-4866	Third Party Advisory
https://security.gentoo.org/glsa/202104-09	Third Party Advisory
https://security.gentoo.org/glsa/202104-10	Third Party Advisory

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Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:mozilla:firefox::::::::
	cpe:2.3:a:mozilla:firefox_esr::::::::
	cpe:2.3:a:mozilla:thunderbird::::::::

Configuration 2 (hide)

OR	cpe:2.3:o:debian:debian_linux:9.0:::::::*
	cpe:2.3:o:debian:debian_linux:10.0:::::::*

Information

Published : 2021-02-25 18:15

Updated : 2022-05-27 11:17

NVD link : CVE-2021-23969

Mitre link : CVE-2021-23969

JSON object : View

CWE

NVD-CWE-noinfo

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Products Affected

mozilla

firefox
firefox_esr
thunderbird

debian

debian_linux

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