Microsoft Internet Explorer 6/7 memory corruption

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.
CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.

A vulnerability classified as critical has been found in Microsoft Internet Explorer 6/7 (Web Browser). This affects an unknown part. The manipulation with an unknown input leads to a memory corruption vulnerability. CWE is classifying the issue as 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. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

Windows HTTP Services (aka WinHTTP) in Microsoft Windows 2000 SP4, XP SP2 and SP3, Server 2003 SP1 and SP2, Vista Gold and SP1, and Server 2008; and WinINet in Microsoft Internet Explorer 5.01 SP4, 6 SP1, 6 and 7 on Windows XP SP2 and SP3, 6 and 7 on Windows Server 2003 SP1 and SP2, 7 on Windows Vista Gold and SP1, and 7 on Windows Server 2008; allows remote web servers to capture and replay NTLM credentials, and execute arbitrary code, via vectors related to absence of a "credential-reflection protections" opt-in step, aka "Windows HTTP Services Credential Reflection Vulnerability" and "WinINet Credential Reflection Vulnerability."

The weakness was released 04/14/2009 by Greg MacManus with 0-day as MS09-014 as confirmed bulletin (Technet). It is possible to read the advisory at This vulnerability is uniquely identified as CVE-2009-0550 since 02/12/2009. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. It demands that the victim is doing some kind of user interaction. Technical details are unknown but a public exploit is available.

The exploit is shared for download at It is declared as proof-of-concept. We expect the 0-day to have been worth approximately $25k-$100k. The vulnerability scanner Nessus provides a plugin with the ID 36151 (MS09-013: Vulnerabilities in Windows HTTP Services Could Allow Remote Code Execution (960803)), 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 100071 (Microsoft Internet Explorer Cumulative Security Update (MS09-014)).

Upgrading eliminates this vulnerability. Applying the patch MS09-014 is able to eliminate this problem. The bugfix is ready for download at The best possible mitigation is suggested to be upgrading to the latest version. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (49549) and Tenable (36151). Further details are available at








  • end of life

CPE 2.3info

CPE 2.2info


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


VulDB Meta Base Score: 6.3
VulDB Meta Temp Score: 5.7

VulDB Base Score: 6.3
VulDB Temp Score: 5.7
VulDB Vector: 🔍
VulDB Reliability: 🔍



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

NVD Base Score: 🔍


Class: Memory corruption
CWE: CWE-119

Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍


Nessus ID: 36151
Nessus Name: MS09-013: Vulnerabilities in Windows HTTP Services Could Allow Remote Code Execution (960803)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

OpenVAS ID: 900092
OpenVAS Name: Windows HTTP Services Could Allow Remote Code Execution Vulnerabilities (960803)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Saint ID: exploit_info/ie_wininet_credential_reflection
Saint Name: Internet Explorer WinINet credential reflection vulnerability

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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


Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Patch: MS09-014
ISS Proventia IPS: 🔍
Fortigate IPS: 🔍


02/12/2009 🔍
04/14/2009 +60 days 🔍
04/14/2009 +0 days 🔍
04/14/2009 +0 days 🔍
04/14/2009 +0 days 🔍
04/14/2009 +0 days 🔍
04/15/2009 +0 days 🔍
04/16/2009 +1 days 🔍
04/16/2009 +0 days 🔍
03/17/2021 +4353 days 🔍



Advisory: MS09-014
Researcher: Greg MacManus
Organization: 0-day
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2009-0550 (🔍)

X-Force: 49549
SecurityTracker: 1022041 - Windows HTTP Services Bugs Let Remote Users Execute Arbitrary Code
Vulnerability Center: 21590 - [MS09-014] Microsoft WinHTTP and WinINet NTLM Credential Reflection Vulnerability, Critical
SecurityFocus: 34439 - Microsoft Windows NTLM Credential Reflection Remote Code Execution Vulnerability
Secunia: 34678 - Microsoft Internet Explorer Multiple Vulnerabilities, Highly Critical
OSVDB: 53619 - Microsoft Windows HTTP Services NTLM Credential Replay Privileged Code Execution
Vupen: ADV-2009-1027

scip Labs:
Misc.: 🔍


Created: 04/16/2009 06:35 PM
Updated: 03/17/2021 08:46 AM
Changes: 04/16/2009 06:35 PM (66), 09/05/2019 01:37 PM (35), 03/17/2021 08:37 AM (7), 03/17/2021 08:40 AM (2), 03/17/2021 08:46 AM (1)
Complete: 🔍
Cache ID: 3:46D:40


No comments yet. Languages: en.

Please log in to comment.

Want to stay up to date on a daily basis?

Enable the mail alert feature now!