Microsoft Internet Explorer 9 Javascript CElement::HasFlag memory corruption

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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5.8$5k-$25k0.00

A vulnerability has been found in Microsoft Internet Explorer 9 (Web Browser) and classified as critical. This vulnerability affects the function CElement::HasFlag of the component Javascript. The manipulation with an unknown input leads to a memory corruption vulnerability. The CWE definition for the vulnerability is CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. As an impact it is known to affect confidentiality, integrity, and availability.

The bug was discovered 09/27/2012. The weakness was published 12/09/2016 by Berend-Jan Wever (SkyLined) as MSIE 9 MSHTML CElement::Has­Flag memory corruption as not defined mailinglist post (Bugtraq). The advisory is available at seclists.org. The vendor was not involved in the coordination of the public release. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Successful exploitation requires user interaction by the victim. Technical details are known, but there is no available exploit. The structure of the vulnerability defines a possible price range of USD $5k-$25k at the moment (estimation calculated on 04/07/2017). It is expected to see the exploit prices for this product decreasing in the near future. The advisory points out:

An attacker would need to get a target user to open a specially crafted web-page. Disabling JavaScript should prevent an attacker from triggering the vulnerable code path.

The vulnerability was handled as a non-public zero-day exploit for at least 1534 days. During that time the estimated underground price was around $25k-$100k. The real existence of this vulnerability is still doubted at the moment.

Applying a patch is able to eliminate this problem. The mailinglist post contains the following remark:

Between December 2012 and February 2013: Microsoft addresses this vulnerability.

Productinfo

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Support

  • end of life

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.3
VulDB Meta Temp Score: 5.8

VulDB Base Score: 6.3
VulDB Temp Score: 5.8
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Memory corruption
CWE: CWE-119
ATT&CK: Unknown

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍

Timelineinfo

09/27/2012 🔍
12/09/2016 +1534 days 🔍
12/11/2016 +2 days 🔍
04/07/2017 +117 days 🔍

Sourcesinfo

Vendor: microsoft.com

Advisory: MSIE 9 MSHTML CElement::Has­Flag memory corruption
Researcher: Berend-Jan Wever (SkyLined)
Status: Not defined
Disputed: 🔍

Entryinfo

Created: 12/11/2016 11:01
Updated: 04/07/2017 12:15
Changes: 12/11/2016 11:01 (48), 04/07/2017 12:15 (2)
Complete: 🔍

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