Microsoft Internet Explorer 11 CElement Object use after free

Summaryinfo

A vulnerability was found in Microsoft Internet Explorer 11 and classified as critical. This affects an unknown part of the component CElement Object Handler. Such manipulation leads to use after free. This vulnerability is uniquely identified as CVE-2015-6045. The attack can be launched remotely. No exploit exists. A patch should be applied to remediate this issue.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Microsoft Internet Explorer 11 (Web Browser). Affected by this issue is an unknown code of the component CElement Object Handler. The manipulation with an unknown input leads to a use after free vulnerability. Using CWE to declare the problem leads to CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. Impacted is confidentiality, integrity, and availability. CVE summarizes:

Use-after-free vulnerability in the CElement object implementation in Microsoft Internet Explorer 11 allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via crafted JavaScript that improperly interacts with use of the Cascading Style Sheets (CSS) empty-cells property for a TABLE element, aka "Internet Explorer Memory Corruption Vulnerability."

The weakness was disclosed 11/13/2015 as MS15-106 as confirmed bulletin (Technet). The advisory is available at technet.microsoft.com. This vulnerability is handled as CVE-2015-6045 since 08/14/2015. 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. The structure of the vulnerability defines a possible price range of USD $5k-$25k at the moment (estimation calculated on 06/27/2022). It is expected to see the exploit prices for this product decreasing in the near future.

The vulnerability scanner Nessus provides a plugin with the ID 86367 (MS15-106: Cumulative Security Update for Internet Explorer (3096441)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Windows : Microsoft Bulletins. The commercial vulnerability scanner Qualys is able to test this issue with plugin 100259 (Microsoft Internet Explorer Cumulative Security Update (MS15-106)).

Applying the patch MS15-106 is able to eliminate this problem. The bugfix is ready for download at technet.microsoft.com. A possible mitigation has been published even before and not after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (86367). The entries VDB-78362, VDB-78376, VDB-78377 and VDB-78378 are pretty similar. If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Type

• Web Browser

Vendor

• Microsoft

Name

• Internet Explorer

Version

• 11

License

• commercial

Support

• end of life

Website

• Vendor: https://www.microsoft.com/

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

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