Sencha Ext JS up to 4.x/5.x/6.5.x XSS Protection getTip cross site scripting

Summaryinfo

A vulnerability was found in Sencha Ext JS up to 4.x/5.x/6.5.x. It has been rated as problematic. This affects the function getTip of the component XSS Protection. This manipulation causes cross site scripting. This vulnerability appears as CVE-2018-8046. The attack may be initiated remotely. There is no available exploit. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in Sencha Ext JS up to 4.x/5.x/6.5.x. It has been declared as problematic. Affected by this vulnerability is the function getTip of the component XSS Protection. The manipulation with an unknown input 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:

The getTip() method of Action Columns of Sencha Ext JS 4 to 6 before 6.6.0 is vulnerable to XSS attacks, even when passed HTML-escaped data. This framework brings no built-in XSS protection, so the developer has to ensure that data is correctly sanitized. However, the getTip() method of Action Columns takes HTML-escaped data and un-escapes it. If the tooltip contains user-controlled data, an attacker could exploit this to create a cross-site scripting attack, even when developers took precautions and escaped data.

The bug was discovered 06/22/2018. The weakness was presented 07/05/2018 as not defined mailinglist post (Full-Disclosure). It is possible to read the advisory at seclists.org. This vulnerability is known as CVE-2018-8046 since 03/11/2018. 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. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1059.007 according to MITRE ATT&CK.

The vulnerability was handled as a non-public zero-day exploit for at least 13 days. During that time the estimated underground price was around $0-$5k.

Upgrading to version 6.6.0 eliminates this vulnerability.

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Productinfo

Vendor

• Sencha

Name

• Ext JS

Version

• 4.x
• 5.x
• 6.0
• 6.1
• 6.2
• 6.3
• 6.4
• 6.5

CPE 2.3info

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CPE 2.2info

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