Mozilla Firefox/Firefox ESR/Thunderbird SVG Element DOM-Based cross site scripting

Summaryinfo

A vulnerability categorized as problematic has been discovered in Mozilla Firefox, Firefox ESR and Thunderbird. This affects an unknown function. Such manipulation as part of SVG Element leads to cross site scripting (DOM-Based). This vulnerability is referenced as CVE-2020-15676. It is possible to launch the attack remotely. No exploit is available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Mozilla Firefox, Firefox ESR and Thunderbird (Web Browser) (affected version unknown). It has been rated as problematic. Affected by this issue is an unknown functionality. The manipulation as part of a SVG Element leads to a cross site scripting vulnerability (DOM-Based). Using CWE to declare the problem leads to CWE-80. The product receives input from an upstream component, but it does not neutralize or incorrectly neutralizes special characters such as "<", ">", and "&" that could be interpreted as web-scripting elements when they are sent to a downstream component that processes web pages. Impacted is integrity. CVE summarizes:

Firefox sometimes ran the onload handler for SVG elements that the DOM sanitizer decided to remove, resulting in JavaScript being executed after pasting attacker-controlled data into a contenteditable element. This vulnerability affects Firefox < 81, Thunderbird < 78.3, and Firefox ESR < 78.3.

The weakness was published 10/01/2020 as Bug 1646140 as not defined bug report (Bugzilla). The advisory is available at bugzilla.mozilla.org. This vulnerability is handled as CVE-2020-15676 since 07/10/2020. The attack may be launched remotely. No form of authentication is required for exploitation. Successful exploitation requires user interaction by the victim. The technical details are unknown and an exploit is not available. This vulnerability is assigned to T1059.007 by the MITRE ATT&CK project.

The vulnerability scanner Nessus provides a plugin with the ID 208644 (CentOS 7 : thunderbird (RHSA-2020:4163)), which helps to determine the existence of the flaw in a target environment.

Upgrading eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (208644). Similar entries are available at VDB-162172, VDB-162171 and VDB-162167. If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Type

• Web Browser

Vendor

• Mozilla

Name

• Firefox
• Firefox ESR
• Thunderbird

License

• open-source

Website

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

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Entryinfo

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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