CVE-2019-11753

Severity Score

7.8

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

The Firefox installer allows Firefox to be installed to a custom user writable location, leaving it unprotected from manipulation by unprivileged users or malware. If the Mozilla Maintenance Service is manipulated to update this unprotected location and the updated maintenance service in the unprotected location has been altered, the altered maintenance service can run with elevated privileges during the update process due to a lack of integrity checks. This allows for privilege escalation if the executable has been replaced locally. <br>*Note: This attack requires local system access and only affects Windows. Other operating systems are not affected.*. This vulnerability affects Firefox < 69, Firefox ESR < 60.9, and Firefox ESR < 68.1.

El instalador de Firefox permite que Firefox sea instalado en una ubicación de escritura personalizada del usuario, dejándolo desprotegido contra la manipulación por parte de usuarios no privilegiados o un malware. Si el Servicio de Mantenimiento de Mozilla es manipulado para actualizar esta ubicación desprotegida y el servicio de mantenimiento actualizado en la ubicación desprotegida ha sido modificado, el servicio de mantenimiento alterado puede ejecutarse con privilegios elevados durante el proceso de actualización debido a la falta de comprobaciones de integridad. Esto permite la escalada de privilegios si el ejecutable ha sido sustituido localmente. <br>*Nota: Este ataque requiere acceso al sistema local y solo afecta a Windows. Otros sistemas operativos no están afectados. *. Esta vulnerabilidad afecta a Firefox versiones anteriores a 69, Firefox ESR versiones anteriores a 60.9 y Firefox ESR versiones anteriores a 68.1.

*Credits: N/A

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Local

Attack Complexity

Low

Authentication

None

Confidentiality

Partial

Integrity

Partial

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2019-05-03 CVE Reserved
2019-09-27 CVE Published
2024-08-04 CVE Updated
2024-09-20 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-354: Improper Validation of Integrity Check Value

CAPEC

References (5)

URL	Tag	Source

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00011.html	2019-10-05
http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00017.html	2019-10-05
https://www.mozilla.org/security/advisories/mfsa2019-25	2019-10-05
https://www.mozilla.org/security/advisories/mfsa2019-26	2019-10-05
https://www.mozilla.org/security/advisories/mfsa2019-27	2019-10-05

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"	< 69.0 Search vendor "Mozilla" for product "Firefox" and version " < 69.0"	-	Affected	in	Microsoft Search vendor "Microsoft"	Windows Search vendor "Microsoft" for product "Windows"	-	-	Safe
Mozilla Search vendor "Mozilla"	Firefox Esr Search vendor "Mozilla" for product "Firefox Esr"	< 60.9.0 Search vendor "Mozilla" for product "Firefox Esr" and version " < 60.9.0"	-	Affected	in	Microsoft Search vendor "Microsoft"	Windows Search vendor "Microsoft" for product "Windows"	-	-	Safe
Mozilla Search vendor "Mozilla"	Firefox Esr Search vendor "Mozilla" for product "Firefox Esr"	>= 68.0 < 68.1.0 Search vendor "Mozilla" for product "Firefox Esr" and version " >= 68.0 < 68.1.0"	-	Affected	in	Microsoft Search vendor "Microsoft"	Windows Search vendor "Microsoft" for product "Windows"	-	-	Safe