CVE-2020-15654

Mozilla: Custom cursor can overlay user interface

Severity Score

6.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

When in an endless loop, a website specifying a custom cursor using CSS could make it look like the user is interacting with the user interface, when they are not. This could lead to a perceived broken state, especially when interactions with existing browser dialogs and warnings do not work. This vulnerability affects Firefox ESR < 78.1, Firefox < 79, and Thunderbird < 78.1.

Cuando en un bucle infinito, un sitio web que especifica un cursor personalizado usando CSS podría hacer que parezca que el usuario está interactuando con la interfaz de usuario, cuando no es así. Esto podría conllevar a un estado roto percibido, especialmente cuando las interacciones con los diálogos y advertencias del navegador existentes no funcionan. Esta vulnerabilidad afecta a Firefox ESR versiones anteriores a 78.1, Firefox versiones anteriores a 79 y Thunderbird versiones anteriores a 78.1

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

None

Integrity

High

Availability

None

Attack Vector

Network

Attack Complexity

Medium

Authentication

None

Confidentiality

None

Integrity

Partial

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2020-07-10 CVE Reserved
2020-07-30 CVE Published
2024-07-17 EPSS Updated
2024-08-04 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-451: User Interface (UI) Misrepresentation of Critical Information
CWE-835: Loop with Unreachable Exit Condition ('Infinite Loop')

CAPEC

References (8)

URL	Tag	Source

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00025.html	2023-02-02
https://bugzilla.mozilla.org/show_bug.cgi?id=1648333	2023-02-02
https://usn.ubuntu.com/4443-1	2023-02-02
https://www.mozilla.org/security/advisories/mfsa2020-30	2023-02-02
https://www.mozilla.org/security/advisories/mfsa2020-32	2023-02-02
https://www.mozilla.org/security/advisories/mfsa2020-33	2023-02-02
https://access.redhat.com/security/cve/CVE-2020-15654	2020-09-30
https://bugzilla.redhat.com/show_bug.cgi?id=1861649	2020-09-30

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"				< 79.0 Search vendor "Mozilla" for product "Firefox" and version " < 79.0"		-		Affected
Mozilla Search vendor "Mozilla"		Firefox Esr Search vendor "Mozilla" for product "Firefox Esr"				< 78.1 Search vendor "Mozilla" for product "Firefox Esr" and version " < 78.1"		-		Affected
Mozilla Search vendor "Mozilla"		Thunderbird Search vendor "Mozilla" for product "Thunderbird"				< 78.1 Search vendor "Mozilla" for product "Thunderbird" and version " < 78.1"		-		Affected
Canonical Search vendor "Canonical"		Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux"				16.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "16.04"		esm		Affected
Canonical Search vendor "Canonical"		Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux"				18.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "18.04"		lts		Affected
Canonical Search vendor "Canonical"		Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux"				20.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "20.04"		lts		Affected