Executive Summary

Summary
Title RSLinx Classic EDS Wizard buffer overflow vulnerability
Informations
NameVU#127584First vendor Publication2011-06-02
VendorVU-CERTLast vendor Modification2011-08-18
Severity (Vendor) N/ARevisionM

Security-Database Scoring CVSS v2

Cvss vector : (AV:N/AC:M/Au:N/C:C/I:C/A:C)
Cvss Base Score9.3Attack RangeNetwork
Cvss Impact Score10Attack ComplexityMedium
Cvss Expoit Score8.6AuthenticationNone Required
Calculate full CVSS 2.0 Vectors scores

Detail

Vulnerability Note VU#127584

RSLinx Classic EDS Wizard buffer overflow vulnerability

Overview

Rockwell Automation RSLinx Classic EDS Hardware Installation Tool contains a buffer overflow vulnerability.

I. Description

According to Rockwell Automation's website: RSLinx Classic provides plant-floor device connectivity for a wide variety of Rockwell Software applications such as RSLogix™ 5/500/5000 and RSView32. The EDS Hardware Installation Tool (RSHWare.exe) that comes bundled with RSLinx Classic contains a buffer overflow vulnerability while parsing improperly formatted EDS files.

II. Impact

An attacker could exploit the vulnerability by tricking a user into opening a crafted .eds file, causing EDS Hardware Installation Tool to crash leading to possible execution of arbitrary code.

III. Solution

Apply an Update

According to Rockwell Automation's security advisory:
Rockwell Automation recommends concerned customers take the following immediate steps to mitigate risk associated with the reported vulnerability:

1. Restrict physical access to the computer.

2. Establish policies and procedures such that only authorized individuals have administrative rights on the computer.

3. Obtain product EDS files from trusted sources (e.g. product vendor)

4. Apply the Rockwell Automation issued Patch Aid
276774


According to Rockwell Automation's security advisory:

Customers who are concerned about this reported vulnerability should recognize that to exploit it would require gaining physical access to the target computer, a user with

administrator privileges and execution of the EDS Hardware Installation Tool in order to load an improperly formatted EDS file.


Use the Microsoft Enhanced Mitigation Experience Toolkit


The Microsoft Enhanced Mitigation Experience Toolkit (EMET) can be used to help prevent exploitation of this and other vulnerabilities.

Enable DEP in Microsoft Windows


Consider enabling Data Execution Prevention (DEP) in supported versions of Windows. DEP should not be treated as a complete workaround, but it can mitigate the execution of attacker-supplied code in some cases. Microsoft has published detailed technical information about DEP in Security Research & Defense blog posts "Understanding DEP as a mitigation technology" part 1 and part 2. DEP should be used in conjunction with the application of patches or other mitigations described in this document.


Note that when relying on DEP for exploit mitigation, it is important to use a system that supports Address Space Layout Randomization (ASLR) as well. ASLR is not supported by Windows XP or Windows Server 2003 or earlier. ASLR was introduced with Microsoft Windows Vista and Windows Server 2008. Please see the Microsoft SRD blog entry: On the effectiveness of DEP and ASLR for more details.

Vendor Information



This vulnerability is present in version 1.3.0.1 and earlier versions of the EDS Hardware Installation Tool (RSHWare.exe).
VendorStatusDate NotifiedDate Updated
Rockwell AutomationAffected2011-04-252011-06-01

References


http://rockwellautomation.custhelp.com/app/answers/detail/a_id/276774
http://rockwellautomation.custhelp.com/app/answers/detail/a_id/54102
http://rockwellautomation.custhelp.com/app/answers/detail/a_id/279194
http://www.us-cert.gov/control_systems/pdf/ICSA-11-161-01.pdf

Credit

This vulnerability was found by Rockwell Automation's internal team and additionally by Michael Orlando working for CERT/CC.

This document was written by Michael Orlando.

Other Information

Date Public:2011-05-31
Date First Published:2011-06-02
Date Last Updated:2011-08-18
CERT Advisory:
CVE-ID(s):CVE-2011-2530
NVD-ID(s):CVE-2011-2530
US-CERT Technical Alerts:
Severity Metric:0.03
Document Revision:31

Original Source

Url : http://www.kb.cert.org/vuls/id/127584

CWE : Common Weakness Enumeration

idName
CWE-119Failure to Constrain Operations within the Bounds of a Memory Buffer

CPE : Common Platform Enumeration

TypeDescriptionCount
Application1
Application8

Open Source Vulnerability Database (OSVDB)

idDescription
73125Rockwell Automation Electronic Data Sheet (EDS) Installation Tool File Handli...