CVE-2022-29916

Mozilla: Leaking browser history with CSS variables

Severity Score

6.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

Firefox behaved slightly differently for already known resources when loading CSS resources involving CSS variables. This could have been used to probe the browser history. This vulnerability affects Thunderbird < 91.9, Firefox ESR < 91.9, and Firefox < 100.

Firefox se comportó de manera ligeramente diferente para recursos ya conocidos al cargar recursos CSS que involucraban variables CSS. Esto podría haberse utilizado para sondear el historial del navegador. Esta vulnerabilidad afecta a Thunderbird < 91.9, Firefox ESR < 91.9 y Firefox < 100.

A flaw was found in Mozilla. The Mozilla Foundation Security Advisory describes the issue of Firefox behaving slightly differently for already known resources when loading CSS resources involving CSS variables. This flaw could probe the browser history.

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2022-04-29 CVE Reserved
2022-05-04 CVE Published
2024-07-14 EPSS Updated
2024-08-03 CVE Updated
2024-08-03 First Exploit
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-497: Exposure of Sensitive System Information to an Unauthorized Control Sphere

CAPEC

References (6)

URL	Tag	Source

URL	Date	SRC
https://bugzilla.mozilla.org/show_bug.cgi?id=1760674	2024-08-03
https://www.mozilla.org/security/advisories/mfsa2022-16	2024-08-03
https://www.mozilla.org/security/advisories/mfsa2022-17	2024-08-03
https://www.mozilla.org/security/advisories/mfsa2022-18	2024-08-03

URL	Date	SRC

URL	Date	SRC
https://access.redhat.com/security/cve/CVE-2022-29916	2022-05-18
https://bugzilla.redhat.com/show_bug.cgi?id=2081470	2022-05-18

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"				< 100.0 Search vendor "Mozilla" for product "Firefox" and version " < 100.0"		-		Affected
Mozilla Search vendor "Mozilla"		Firefox Esr Search vendor "Mozilla" for product "Firefox Esr"				< 91.9 Search vendor "Mozilla" for product "Firefox Esr" and version " < 91.9"		-		Affected
Mozilla Search vendor "Mozilla"		Thunderbird Search vendor "Mozilla" for product "Thunderbird"				< 91.9 Search vendor "Mozilla" for product "Thunderbird" and version " < 91.9"		-		Affected