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Vulnerability: MS09-053 Important Vulnerabilities in FTP Service for Internet Information Services Could Allow Remote Code Execution (975254)
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| Details | |
|---|---|
| Vulnerability name/brief description | MS09-053 - Important Vulnerabilities in FTP Service for Internet Information Services Could Allow Remote Code Execution (975254) |
| CVE/CAN name | CVE-2009-2521, CVE-2009-3023 |
| Vendor threat level | Important |
| SophosLabs threat level | Low |
| Solution | |
| Vendor description | This security update resolves two publicly disclosed vulnerabilities in the FTP Service in Microsoft Internet Information Services (IIS) 5.0, Microsoft Internet Information Services (IIS) 5.1, Microsoft Internet Information Services (IIS) 6.0, and Microsoft Internet Information Services (IIS) 7.0. On IIS 7.0, only FTP Service 6.0 is affected. The vulnerabilities could allow remote code execution (RCE) on systems running FTP Service on IIS 5.0, or denial of service (DoS) on systems running FTP Service on IIS 5.0, IIS 5.1, IIS 6.0 or IIS 7.0. The security update addresses the vulnerabilities by modifying the way that the FTP Service handles list operations. |
| SophosLabs comments | This security update fixed two publicly disclosed denial of service vulnerabilities in the FTP service. An attacker who exploited these 2 vulnerabilities could cause the affected service to stop responding and automatically restart. Note that the denial of service vulnerability would not allow an attacker to execute code or to elevate their user rights, but it could cause the affected system to stop accepting requests. The vulnerabilities also allow remote code execution on systems running Microsoft Windows 2000 Service Pack 4 and a denial of service on all of the other affected platforms. An attacker who successfully exploited this vulnerability in IIS 5.0 on Microsoft Windows 2000 Service Pack 4 could cause remote code execution in the context of LocalSystem. An attacker who successfully exploited this vulnerability on IIS 5.1 and IIS 6.0 could cause the IIS FTP service to stop and become unresponsive. |
| SophosLabs testing result | N/A |
| Currently known exploits | At the time of writing SophosLabs have not observed any malware attempting to exploit this vulnerability. Should this situation change samples will be analyzed and we will take action as necessary. |
| First sample seen | N/A |
| Discovery date | 13 October 2009 |
| Affected software | Microsoft Operating Systems *Server Core installation affected. This update applies, with the same severity rating, to supported editions of Windows Server 2008 or Windows Server 2008 R2 as indicated, whether or not installed using the Server Core installation option. |
| References | http://www.microsoft.com/technet/security/Bulletin/ms09-053.mspx http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-2521 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-3023 |
| Credits | Microsoft MAPP program Kingcope (CVE-2009-2521) Kingcope (CVE-2009-3023) |
| Revisions | 14 October 2009 - Initial analysis written |
Explanation of terms
Vulnerability Name/Brief Description:
Vendor identifier plus a brief description of the type of attack.
CVE/CAN Name:
Currently assigned CVE name. If a CVE name doesn't exist the CAN name will be used until a CVE has been assigned.
Vendor Threat Level:
Threat level assigned by the vendor
SophosLabs Threat Level:
Threat level assigned by SophosLabs
- LOW RISK - There is little chance of this vulnerability being actively exploited by malware.
- MEDIUM RISK - There is a possibility of this vulnerability being actively exploited by malware.
- HIGH RISK - There is a strong possibility of this vulnerability being actively exploited by malware.
- CRITICAL RISK - This vulnerability will almost certainly be actively exploited by malware.
Solution:
Vendor-supplied Patch identifier and recommended solution, or workaround if applicable.
Vendor Description:
Summary of the cause and potential effect of the vulnerability provided by the vendor.
SophosLabs Comments:
SophosLabs' opinions and observations of the vulnerability in question.
SophosLabs Testing Result:
Details of completed lab testing, if applicable. Please note that the lab test environment may differ significantly from user environments.
Currently Known Exploits:
List of identities for known exploits, if applicable.
First Sample Seen:
Date of the first sample seen by SophosLabs.
Discovery Date:
Date of the earliest known publically disclosed advisory.
Affected Software:
Vulnerable platforms and software versions.
If you need more information or guidance, then please contact technical support.
- Article ID: 64659
- Created: 14 Oct 2009
- Last updated: 14 Oct 2009
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