CVE-2020-6798

Mozilla: Incorrect parsing of template tag could result in JavaScript injection

Severity Score

6.1

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

If a template tag was used in a select tag, the parser could be confused and allow JavaScript parsing and execution when it should not be allowed. A site that relied on the browser behaving correctly could suffer a cross-site scripting vulnerability as a result. In general, this flaw cannot be exploited through email in the Thunderbird product because scripting is disabled when reading mail, but is potentially a risk in browser or browser-like contexts. This vulnerability affects Thunderbird < 68.5, Firefox < 73, and Firefox < ESR68.5.

Si se usó una etiqueta template en una etiqueta select, el analizador podría ser confundido y permitir el análisis y la ejecución de JavaScript cuando no debería ser permitido. Un sitio que se basó en que el navegador se comportara correctamente podría sufrir una vulnerabilidad de tipo cross-site scripting como resultado de ello. En general, este fallo no puede ser explotado por medio del correo electrónico en el producto Thunderbird porque el scripting es deshabilitado cuando se lee el correo, pero es potencialmente un riesgo en el navegador o en contextos similares a los del navegador. Esta vulnerabilidad afecta a Thunderbird versiones anteriores a 68.5, Firefox versiones anteriores a 73, y Firefox versiones anteriores a ESR68.5.

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

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

2020-01-10 CVE Reserved
2020-02-14 CVE Published
2024-02-06 EPSS Updated
2024-08-04 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

CAPEC

References (10)

URL	Tag	Source

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://security.gentoo.org/glsa/202003-02	2020-03-12
https://security.gentoo.org/glsa/202003-10	2020-03-12
https://usn.ubuntu.com/4278-2	2020-03-12
https://usn.ubuntu.com/4328-1	2020-03-12
https://usn.ubuntu.com/4335-1	2020-03-12
https://www.mozilla.org/security/advisories/mfsa2020-05	2020-03-12
https://www.mozilla.org/security/advisories/mfsa2020-06	2020-03-12
https://www.mozilla.org/security/advisories/mfsa2020-07	2020-03-12
https://access.redhat.com/security/cve/CVE-2020-6798	2020-02-24
https://bugzilla.redhat.com/show_bug.cgi?id=1801918	2020-02-24

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"				< 73.0 Search vendor "Mozilla" for product "Firefox" and version " < 73.0"		-		Affected
Mozilla Search vendor "Mozilla"		Firefox Esr Search vendor "Mozilla" for product "Firefox Esr"				< 68.5.0 Search vendor "Mozilla" for product "Firefox Esr" and version " < 68.5.0"		-		Affected
Mozilla Search vendor "Mozilla"		Thunderbird Search vendor "Mozilla" for product "Thunderbird"				< 68.5.0 Search vendor "Mozilla" for product "Thunderbird" and version " < 68.5.0"		-		Affected