CVE-2019-11738

Mozilla: Content security policy bypass through hash-based sources in directives

Severity Score

6.3

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

If a Content Security Policy (CSP) directive is defined that uses a hash-based source that takes the empty string as input, execution of any javascript: URIs will be allowed. This could allow for malicious JavaScript content to be run, bypassing CSP permissions. This vulnerability affects Firefox < 69 and Firefox ESR < 68.1.

Si una directiva de Content Security Policy (CSP) se define que usa una fuente basada en hash que toma la cadena vacía como entrada, se permitirá la ejecución de cualquier URI javascript:. Esto podría permitir que contenido malicioso de JavaScript sea ejecutado, sin pasar por los permisos de CSP. Esta vulnerabilidad afecta a Firefox versiones anteriores a 69 y Firefox ESR versiones anteriores a 68.1.

*Credits: N/A

CVSS Scores

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

Low

Integrity

Low

Availability

Low

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

Low

Attack Vector

Network

Attack Complexity

Medium

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

CWE

CWE-358: Improperly Implemented Security Check for Standard

CAPEC

References (7)

URL	Tag	Source

URL	Date	SRC
https://bugzilla.mozilla.org/show_bug.cgi?id=1452037	2024-08-04

URL	Date	SRC

URL	Date	SRC
http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00011.html	2022-03-31
http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00017.html	2022-03-31
https://www.mozilla.org/security/advisories/mfsa2019-25	2022-03-31
https://www.mozilla.org/security/advisories/mfsa2019-26	2022-03-31
https://access.redhat.com/security/cve/CVE-2019-11738	2019-09-04
https://bugzilla.redhat.com/show_bug.cgi?id=1748663	2019-09-04

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
Mozilla Search vendor "Mozilla"		Firefox Esr Search vendor "Mozilla" for product "Firefox Esr"				< 68.1.0 Search vendor "Mozilla" for product "Firefox Esr" and version " < 68.1.0"		-		Affected
Opensuse Search vendor "Opensuse"		Leap Search vendor "Opensuse" for product "Leap"				15.0 Search vendor "Opensuse" for product "Leap" and version "15.0"		-		Affected
Opensuse Search vendor "Opensuse"		Leap Search vendor "Opensuse" for product "Leap"				15.1 Search vendor "Opensuse" for product "Leap" and version "15.1"		-		Affected