Mozilla Firefox up to 67.x Web Parser Unicode Character cross site scripting

Summaryinfo

A vulnerability marked as problematic has been reported in Mozilla Firefox up to 67.x. This impacts an unknown function of the component Web Parser. This manipulation as part of Unicode Character causes cross site scripting. The identification of this vulnerability is CVE-2019-11720. It is possible to initiate the attack remotely. There is no exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in Mozilla Firefox up to 67.x (Web Browser). It has been declared as problematic. Affected by this vulnerability is an unknown code of the component Web Parser. The manipulation as part of a Unicode Character leads to a cross site scripting vulnerability. The CWE definition for the vulnerability is CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. As an impact it is known to affect integrity. The summary by CVE is:

Some unicode characters are incorrectly treated as whitespace during the parsing of web content instead of triggering parsing errors. This allows malicious code to then be processed, evading cross-site scripting (XSS) filtering. This vulnerability affects Firefox < 68.

The weakness was shared 07/23/2019 (Website). It is possible to read the advisory at security.gentoo.org. This vulnerability is known as CVE-2019-11720 since 05/03/2019. The attack can be launched remotely. The exploitation doesn't need any form of authentication. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1059.007 according to MITRE ATT&CK.

Upgrading to version 68.0 eliminates this vulnerability.

The entries VDB-138488, VDB-138489, VDB-138490 and VDB-138491 are related to this item. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

• Web Browser

Vendor

• Mozilla

Name

• Firefox

Version

• 67.x

License

• open-source

Website

• Vendor: https://www.mozilla.org/
• Product: https://www.mozilla.org/en-US/firefox/

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Discussion