Vulnerability: MS09-042. Vulnerability in Telnet Could Allow Remote Code Execution (960859)
Back to Latest vulnerabilities homepage
Click any highlighted term for further explanation.
| Details | |
|---|---|
| Vulnerability name/brief description | Vulnerability in Telnet Could Allow Remote Code Execution (960859) |
| CVE/CAN name | CVE-2009-1930 |
| Vendor threat level | Important |
| SophosLabs threat level | Medium |
| Solution | |
| Vendor description | This security update resolves a publicly disclosed vulnerability in the Microsoft Telnet service. The vulnerability could allow an attacker to obtain credentials and then use them to log back into affected systems. The attacker would then acquire user rights on a system identical to the user rights of the logged-on user. This scenario could ultimately result in remote code execution on affected systems. An attacker who successfully exploited this vulnerability could install programs; view, change, or delete data; or create new accounts with full user rights. Users whose accounts are configured to have fewer user rights on the system could be less impacted than users who operate with administrative user rights. |
| SophosLabs comments | An error in the way some versions of Windows manage Telnet NTLM credential-reflection/challenge-response authentication could allow an attacker intercepting Telnet traffic, or in control of a Telnet server, to use the intercepted challenge response to authenticate a second connection against a victims system. This second session would be authenticated with the same privileges as the victim. |
| SophosLabs testing result | N/A |
| Currently known exploits | N/A |
| First sample seen | N/A |
| Discovery date | September 2000 |
| Affected software | Microsoft Windows 2000 Service Pack 4 Windows XP Service Pack 2 and Windows XP Service Pack 3 Windows XP Professional x64 Edition Service Pack 2 Windows Server 2003 Service Pack 2 Windows Server 2003 x64 Edition Service Pack 2 Windows Server 2003 with SP2 for Itanium-based Systems Windows Vista, Windows Vista Service Pack 1, and Windows Vista Service Pack 2 Windows Vista x64 Edition, Windows Vista x64 Edition Service Pack 1, and Windows Vista x64 Edition Service Pack 2 Windows Server 2008 for 32-bit Systems and Windows Server 2008 for 32-bit Systems Service Pack 2 Windows Server 2008 for x64-based Systems and Windows Server 2008 for x64-based Systems Service Pack 2 Windows Server 2008 for Itanium-based Systems and Windows Server 2008 for Itanium-based Systems Service Pack 2 |
| References | http://www.microsoft.com/technet/security/bulletin/ms09-042.mspx http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-1930 http://www.microsoft.com/technet/security/bulletin/MS00-067.mspx http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2000-0834 http://packetstormsecurity.org/advisories/atstake/A091400-1 |
| Credits | Microsoft MAPP DilDog of @Stake Inc. |
| Revisions | 12th August 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: 61997
- Created: 12 Aug 2009
- Last updated: 12 Aug 2009
