Microsoft IIS 7.5 FTP Server Telnet IAC Character memory corruption

CVSS Meta Temp Score
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CTI Interest Score
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7.2$0-$5k0.04

A vulnerability has been found in Microsoft IIS 7.5 (Web Server) and classified as critical. This vulnerability affects some unknown processing of the component FTP Server. The manipulation as part of a Telnet IAC Character 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 availability. CVE summarizes:

Heap-based buffer overflow in the TELNET_STREAM_CONTEXT::OnSendData function in ftpsvc.dll in Microsoft FTP Service 7.0 and 7.5 for Internet Information Services (IIS) 7.0, and IIS 7.5, allows remote attackers to execute arbitrary code or cause a denial of service (daemon crash) via a crafted FTP command, aka "IIS FTP Service Heap Buffer Overrun Vulnerability." NOTE: some of these details are obtained from third party information.

The issue has been introduced in 07/22/2009. The weakness was shared 12/22/2010 by Matthew Bergin (Website). The advisory is available at exploit-db.com. This vulnerability was named CVE-2010-3972 since 10/14/2010. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Technical details are unknown but a public exploit is available.

A public exploit has been developed by Matthew Bergin in Python and been published even before and not after the advisory. It is possible to download the exploit at securityfocus.com. It is declared as highly functional. The vulnerability was handled as a non-public zero-day exploit for at least 518 days. During that time the estimated underground price was around $25k-$100k. The vulnerability scanner Nessus provides a plugin with the ID 51904 (MS11-004: Vulnerability in Internet Information Services (IIS) FTP Service Could Allow Remote Code Execution (2489256)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Windows : Microsoft Bulletins and running in the context l.

Upgrading eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at blogs.technet.com. The best possible mitigation is suggested to be upgrading to the latest version. A possible mitigation has been published 2 months after the disclosure of the vulnerability. Furthermore it is possible to detect and prevent this kind of attack with TippingPoint and the filter 10812.

The vulnerability is also documented in the databases at X-Force (64905), Tenable (51904) and Exploit-DB (15803).

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

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CVSSv3info

VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 7.2

VulDB Base Score: 7.5
VulDB Temp Score: 7.2
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VulDB Reliability: 🔍

CVSSv2info

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Exploitinginfo

Class: Memory corruption
CWE: CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Local: No
Remote: Yes

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

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Nessus ID: 51904
Nessus Name: MS11-004: Vulnerability in Internet Information Services (IIS) FTP Service Could Allow Remote Code Execution (2489256)
Nessus File: 🔍
Nessus Risk: 🔍
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OpenVAS ID: 901183
OpenVAS Name: Internet Information Services (IIS) FTP Service Remote Code Execution Vulnerability (2489256)
OpenVAS File: 🔍
OpenVAS Family: 🔍

MetaSploit ID: iis75_ftpd_iac_bof.rb
MetaSploit Name: Microsoft IIS FTP Server Encoded Response Overflow Trigger
MetaSploit File: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

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Countermeasuresinfo

Recommended: Upgrade
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Patch: blogs.technet.com
TippingPoint: 🔍

McAfee IPS: 🔍
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ISS Proventia IPS: 🔍
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Timelineinfo

07/22/2009 🔍
10/14/2010 +449 days 🔍
12/21/2010 +68 days 🔍
12/21/2010 +0 days 🔍
12/21/2010 +0 days 🔍
12/21/2010 +0 days 🔍
12/22/2010 +1 days 🔍
12/22/2010 +0 days 🔍
12/22/2010 +0 days 🔍
12/22/2010 +0 days 🔍
12/23/2010 +0 days 🔍
12/26/2010 +3 days 🔍
01/19/2011 +24 days 🔍
02/08/2011 +20 days 🔍
02/08/2011 +0 days 🔍
03/18/2021 +3691 days 🔍

Sourcesinfo

Vendor: microsoft.com

Advisory: exploit-db.com
Researcher: Matthew Bergin
Status: Confirmed

CVE: CVE-2010-3972 (🔍)
OVAL: 🔍

X-Force: 64905
SecurityTracker: 1024921 - Microsoft IIS FTP Server Lets Remote Users Deny Service
Vulnerability Center: 28789 - [MS11-005] Microsoft Internet Information Services 7.5 Remote Arbitrary Code Execution Vulnerability, Critical
SecurityFocus: 45542 - Microsoft IIS FTP Service Remote Buffer Overflow Vulnerability
Secunia: 42713 - Microsoft IIS FTP Server Telnet IAC Character Encoding Vulnerability, Highly Critical
OSVDB: 70167 - Microsoft IIS FTP Server Telnet IAC Character Handling Overflow
Vupen: ADV-2010-3305

scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 01/19/2011 01:00
Updated: 03/18/2021 15:28
Changes: 01/19/2011 01:00 (93), 03/12/2017 08:46 (22), 03/18/2021 15:28 (3)
Complete: 🔍

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