CVE-2019-17022

Mozilla: CSS sanitization does not escape HTML tags

Severity Score

6.1

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

When pasting a <style> tag from the clipboard into a rich text editor, the CSS sanitizer does not escape < and > characters. Because the resulting string is pasted directly into the text node of the element this does not result in a direct injection into the webpage; however, if a webpage subsequently copies the node's innerHTML, assigning it to another innerHTML, this would result in an XSS vulnerability. Two WYSIWYG editors were identified with this behavior, more may exist. This vulnerability affects Firefox ESR < 68.4 and Firefox < 72.

Al pegar un <style> etiqueta del portapapeles en un editor de texto enriquecido, el saneador CSS no escapa caracteres < y >. Debido a que la cadena resultante es pegada directamente en el nodo de texto del elemento, esto no resulta en una inyección directa en la página web; sin embargo, si una página web posteriormente copia el innerHTML del nodo y lo asigna a otro innerHTML, esto generaría una vulnerabilidad XSS. Dos editores WYSIWYG fueron identificados con este comportamiento, pueden existir más. Esta vulnerabilidad afecta a Firefox ESR versiones anteriores a la versión 68.4 y Firefox versiones anteriores a la versión 72.

*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

2019-09-30 CVE Reserved
2020-01-08 CVE Published
2024-05-03 EPSS Updated
2024-08-05 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 (26)

URL	Tag	Source
http://packetstormsecurity.com/files/155912/Slackware-Security-Advisory-mozilla-thunderbird-Updates.html	X_refsource_misc
https://lists.debian.org/debian-lts-announce/2020/01/msg00005.html	Mailing List
https://lists.debian.org/debian-lts-announce/2020/01/msg00016.html	Mailing List
https://seclists.org/bugtraq/2020/Jan/12	Mailing List
https://seclists.org/bugtraq/2020/Jan/18	Mailing List
https://seclists.org/bugtraq/2020/Jan/26	Mailing List

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00029.html	2020-01-13
http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00043.html	2020-01-13
https://access.redhat.com/errata/RHSA-2020:0085	2020-01-13
https://access.redhat.com/errata/RHSA-2020:0086	2020-01-13
https://access.redhat.com/errata/RHSA-2020:0111	2020-01-13
https://access.redhat.com/errata/RHSA-2020:0120	2020-01-13
https://access.redhat.com/errata/RHSA-2020:0123	2020-01-13
https://access.redhat.com/errata/RHSA-2020:0127	2020-01-13
https://access.redhat.com/errata/RHSA-2020:0292	2020-01-13
https://access.redhat.com/errata/RHSA-2020:0295	2020-01-13
https://security.gentoo.org/glsa/202003-02	2020-01-13
https://usn.ubuntu.com/4234-1	2020-01-13
https://usn.ubuntu.com/4241-1	2020-01-13
https://usn.ubuntu.com/4335-1	2020-01-13
https://www.debian.org/security/2020/dsa-4600	2020-01-13
https://www.debian.org/security/2020/dsa-4603	2020-01-13
https://www.mozilla.org/security/advisories/mfsa2020-01	2020-01-13
https://www.mozilla.org/security/advisories/mfsa2020-02	2020-01-13
https://access.redhat.com/security/cve/CVE-2019-17022	2020-01-30
https://bugzilla.redhat.com/show_bug.cgi?id=1788726	2020-01-30

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"				< 72.0 Search vendor "Mozilla" for product "Firefox" and version " < 72.0"		-		Affected
Mozilla Search vendor "Mozilla"		Firefox Esr Search vendor "Mozilla" for product "Firefox Esr"				< 68.4 Search vendor "Mozilla" for product "Firefox Esr" and version " < 68.4"		-		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"		lts		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"				19.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "19.04"		-		Affected
Canonical Search vendor "Canonical"		Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux"				19.10 Search vendor "Canonical" for product "Ubuntu Linux" and version "19.10"		-		Affected
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				8.0 Search vendor "Debian" for product "Debian Linux" and version "8.0"		-		Affected
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				9.0 Search vendor "Debian" for product "Debian Linux" and version "9.0"		-		Affected
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				10.0 Search vendor "Debian" for product "Debian Linux" and version "10.0"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Desktop Search vendor "Redhat" for product "Enterprise Linux Desktop"				6.0 Search vendor "Redhat" for product "Enterprise Linux Desktop" and version "6.0"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Desktop Search vendor "Redhat" for product "Enterprise Linux Desktop"				7.0 Search vendor "Redhat" for product "Enterprise Linux Desktop" and version "7.0"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Server Search vendor "Redhat" for product "Enterprise Linux Server"				6.0 Search vendor "Redhat" for product "Enterprise Linux Server" and version "6.0"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Server Search vendor "Redhat" for product "Enterprise Linux Server"				7.0 Search vendor "Redhat" for product "Enterprise Linux Server" and version "7.0"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Server Aus Search vendor "Redhat" for product "Enterprise Linux Server Aus"				7.7 Search vendor "Redhat" for product "Enterprise Linux Server Aus" and version "7.7"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Server Tus Search vendor "Redhat" for product "Enterprise Linux Server Tus"				7.7 Search vendor "Redhat" for product "Enterprise Linux Server Tus" and version "7.7"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Workstation Search vendor "Redhat" for product "Enterprise Linux Workstation"				6.0 Search vendor "Redhat" for product "Enterprise Linux Workstation" and version "6.0"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Workstation Search vendor "Redhat" for product "Enterprise Linux Workstation"				7.0 Search vendor "Redhat" for product "Enterprise Linux Workstation" and version "7.0"		-		Affected