Vulnerability: MS09-045 - Vulnerability in JScript Scripting Engine Could Allow Remote Code Execution (971961)
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| Details | |
|---|---|
| Vulnerability name/brief description | MS09-045 - Vulnerability in JScript Scripting Engine Could Allow Remote Code Execution (971961) |
| CVE/CAN name | CVE-2009-1920 |
| Vendor threat level | Critical |
| SophosLabs threat level | Medium |
| Solution | |
| Vendor description | This security update resolves a privately reported vulnerability in the JScript scripting engine that could allow remote code execution if a user opened a specially crafted file or visited a specially crafted Web site and invoked a malformed script. |
| SophosLabs comments | Vulnerability exploitation via malformed files is usually one of the most common malware attacks that we see these days, and yet, possibly due to the fact that this is a privately reported vulnerability we do not believe we have seen any samples that use this particular JScript vulnerability and no PoC is known. However, this situation could quickly change and we urge users to install this patch at their earliest convenience. |
| SophosLabs testing result | N/A |
| Currently known exploits | At the time of writing SophosLabs has seen no samples of malware or web-content 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 | 08 September 2009 |
| Affected software | JScript 5.1 on Microsoft Windows 2000 Service Pack 4 * Windows Server 2008 server core installation affected. |
| References | http://www.microsoft.com/technet/security/Bulletin/MS09-045.mspx http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-1920 |
| Credits | Microsoft MAPP program |
| Revisions | 09 September 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: 62931
- Created: 9 Sep 2009
- Last updated: 9 Sep 2009
