Microsoft Internet Explorer 9 memory corruption

CVSS Meta Temp Score
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CTI Interest Score
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A vulnerability, which was classified as critical, has been found in Microsoft Internet Explorer 9 (Web Browser). This issue affects some unknown functionality. The manipulation with an unknown input leads to a memory corruption vulnerability. Using CWE to declare the problem leads to 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. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

Use-after-free vulnerability in Microsoft Internet Explorer 9 allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via a certain sequence of manipulations of a TextRange element, aka "Internet Explorer Memory Corruption Vulnerability."

The issue has been introduced in 03/16/2010. The weakness was shared 03/11/2014 by Jason Kratzer (iDefense) with VeriSign iDefense Labs as MS14-012 as confirmed bulletin (Technet) via iDefense. It is possible to read the advisory at The vendor cooperated in the coordination of the public release. The identification of this vulnerability is CVE-2014-0307 since 12/03/2013. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. It demands that the victim is doing some kind of user interaction. Technical details are unknown but a public exploit is available.

A public exploit has been developed by Metasploit in Ruby and been published 2 weeks after the advisory. The exploit is available at It is declared as highly functional. The vulnerability was handled as a non-public zero-day exploit for at least 1456 days. During that time the estimated underground price was around $25k-$100k. The vulnerability scanner Nessus provides a plugin with the ID 72930 (MS14-012: Cumulative Security Update for Internet Explorer (2925418)), 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 100180 (Microsoft Internet Explorer Multiple Remote Code Execution Vulnerabilities (MS14-012)).

Applying the patch MS14-012 is able to eliminate this problem. The bugfix is ready for download at A possible mitigation has been published immediately after the disclosure of the vulnerability. Furthermore it is possible to detect and prevent this kind of attack with TippingPoint and the filter 13420.

The vulnerability is also documented in the databases at X-Force (91384), Tenable (72930) and Exploit-DB (32438). is providing further details.








  • end of life

CPE 2.3info

CPE 2.2info


VulDB CVSS-B Score: 🔍
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VulDB Meta Base Score: 6.3
VulDB Meta Temp Score: 5.7

VulDB Base Score: 6.3
VulDB Temp Score: 5.7
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Class: Memory corruption
CWE: CWE-119

Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Highly functional
Author: Metasploit
Programming Language: 🔍
Download: 🔍

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Nessus ID: 72930
Nessus Name: MS14-012: Cumulative Security Update for Internet Explorer (2925418)
Nessus File: 🔍
Nessus Risk: 🔍
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Qualys ID: 🔍
Qualys Name: 🔍

MetaSploit ID: ms14_012_textrange.rb
MetaSploit Name: MS14-012 Microsoft Internet Explorer TextRange Use-After-Free
MetaSploit File: 🔍

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Threat Intelligenceinfo

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Recommended: Patch
Status: 🔍

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Patch: MS14-012
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03/16/2010 🔍
12/03/2013 +1358 days 🔍
03/11/2014 +98 days 🔍
03/11/2014 +0 days 🔍
03/11/2014 +0 days 🔍
03/11/2014 +0 days 🔍
03/12/2014 +1 days 🔍
03/12/2014 +0 days 🔍
03/12/2014 +0 days 🔍
03/22/2014 +10 days 🔍
03/22/2014 +0 days 🔍
06/15/2021 +2642 days 🔍



Advisory: MS14-012
Researcher: Jason Kratzer (iDefense)
Organization: VeriSign iDefense Labs
Status: Confirmed
Coordinated: 🔍

CVE: CVE-2014-0307 (🔍)

X-Force: 91384 - Microsoft Internet Explorer code execution, High Risk
Vulnerability Center: 43566 - [MS14-012] Microsoft Internet Explorer 9 Remote Code Execution or DoS due to Memory Corruption (CVE-2014-0307), Critical
SecurityFocus: 66032 - Microsoft Internet Explorer CVE-2014-0307 Memory Corruption Vulnerability

scip Labs:
Misc.: 🔍


Created: 03/12/2014 03:12 PM
Updated: 06/15/2021 12:56 PM
Changes: 03/12/2014 03:12 PM (91), 04/07/2017 12:04 PM (12), 06/15/2021 12:56 PM (2)
Complete: 🔍
Cache ID: 100:6EC:40


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