Summaryinfo

A vulnerability labeled as problematic has been found in Yahoo! Toolbar 2.5.9.2013418100420/3.1.0.20130813024103 on Firefox. This issue affects some unknown processing of the component URL Adding Validation Handler. The manipulation results in cross site scripting (DOM-Based). This vulnerability is cataloged as CVE-2013-6853. The attack may be launched remotely. Furthermore, there is an exploit available. It is best to disable the affected component.

Detailsinfo

A vulnerability was found in Yahoo! Toolbar 2.5.9.2013418100420/3.1.0.20130813024103 on Firefox. It has been classified as problematic. Affected is an unknown part of the component URL Adding Validation Handler. The manipulation with an unknown input leads to a cross site scripting vulnerability (DOM-Based). CWE is classifying the issue as 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. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

Cross-site scripting (XSS) vulnerability in clickstream.js in Y! Toolbar plugin for FireFox 3.1.0.20130813024103 for Mac, and 2.5.9.2013418100420 for Windows, allows remote attackers to inject arbitrary web script or HTML via a crafted URL that is stored by the victim.

The weakness was shared 01/14/2014 by Hoyt LLC with Hoyt LLC Research as Stored XSS in Y! Toolbar DOM for FireFox on MAC V3.1 + Windows V2.5 Resolved as confirmed blog post (Website). The advisory is available at cloudscan.me. The vendor was not involved in the coordination of the public release. This vulnerability is traded as CVE-2013-6853 since 11/22/2013. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Successful exploitation requires user interaction by the victim. Technical details are unknown but a public exploit is available. This vulnerability is assigned to T1059.007 by the MITRE ATT&CK project.

A public exploit has been developed in Javascript and been published immediately after the advisory. The exploit is shared for download at cloudscan.me. It is declared as functional.

The best possible mitigation is suggested to be disabling the affected component.

The vulnerability is also documented in the databases at X-Force (90529), SecurityFocus (BID 64971†) and OSVDB (102175†). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Vendor

• Yahoo!

Name

• Toolbar

Version

• 2.5.9.2013418100420
• 3.1.0.20130813024103

License

• free

Website

• Vendor: https://www.yahoo.com/

CPE 2.3info

• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

Discussion