CVE-2021-23968

Mozilla: Content Security Policy violation report could have contained the destination of a redirect

Severity Score

4.3

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

If Content Security Policy blocked frame navigation, the full destination of a redirect served in the frame was reported in the violation report; as opposed to the original frame URI. This could be used to leak sensitive information contained in such URIs. This vulnerability affects Firefox < 86, Thunderbird < 78.8, and Firefox ESR < 78.8.

Si la Política de Seguridad de Contenido bloqueaba la navegación de tramas, el destino completo de un redireccionamiento servido en la trama se reportaba en el informe de infracción; a diferencia del URI de la trama original. Esto podría ser usado para filtrar información confidencial contenida en dichos URI. Esta vulnerabilidad afecta a Firefox versiones anteriores a 86, Thunderbird versiones anteriores a 78,8 y Firefox ESR versiones anteriores a 78,8

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

None

Attack Vector

Network

Attack Complexity

Medium

Authentication

None

Confidentiality

Partial

Integrity

None

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2021-01-13 CVE Reserved
2021-02-25 CVE Published
2024-07-16 EPSS Updated
2024-08-03 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-200: Exposure of Sensitive Information to an Unauthorized Actor
CWE-209: Generation of Error Message Containing Sensitive Information

CAPEC

References (9)

URL	Tag	Source
https://lists.debian.org/debian-lts-announce/2021/03/msg00000.html	Mailing List

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://security.gentoo.org/glsa/202104-09	2022-05-27
https://security.gentoo.org/glsa/202104-10	2022-05-27
https://www.debian.org/security/2021/dsa-4866	2022-05-27
https://www.mozilla.org/security/advisories/mfsa2021-07	2022-05-27
https://www.mozilla.org/security/advisories/mfsa2021-08	2022-05-27
https://www.mozilla.org/security/advisories/mfsa2021-09	2022-05-27
https://access.redhat.com/security/cve/CVE-2021-23968	2021-02-24
https://bugzilla.redhat.com/show_bug.cgi?id=1932110	2021-02-24

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Mozilla Search vendor "Mozilla"		Firefox Search vendor "Mozilla" for product "Firefox"				< 86.0 Search vendor "Mozilla" for product "Firefox" and version " < 86.0"		-		Affected
Mozilla Search vendor "Mozilla"		Firefox Esr Search vendor "Mozilla" for product "Firefox Esr"				< 78.8 Search vendor "Mozilla" for product "Firefox Esr" and version " < 78.8"		-		Affected
Mozilla Search vendor "Mozilla"		Thunderbird Search vendor "Mozilla" for product "Thunderbird"				< 78.8 Search vendor "Mozilla" for product "Thunderbird" and version " < 78.8"		-		Affected
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				9.0 Search vendor "Debian" for product "Debian Linux" and version "9.0"		-		Affected
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				10.0 Search vendor "Debian" for product "Debian Linux" and version "10.0"		-		Affected