Executive Summary

Summary
Title Sielco Sistemi Winlog server stack overflow
Informations
Name VU#496040 First vendor Publication 2011-02-03
Vendor VU-CERT Last vendor Modification 2011-02-03
Severity (Vendor) N/A Revision M

Security-Database Scoring CVSS v3

Cvss vector : N/A
Overall CVSS Score NA
Base Score NA Environmental Score NA
impact SubScore NA Temporal Score NA
Exploitabality Sub Score NA
 
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector : (AV:N/AC:M/Au:N/C:C/I:C/A:C)
Cvss Base Score 9.3 Attack Range Network
Cvss Impact Score 10 Attack Complexity Medium
Cvss Expoit Score 8.6 Authentication None Required
Calculate full CVSS 2.0 Vectors scores

Detail

Vulnerability Note VU#496040

Sielco Sistemi Winlog server stack overflow

Overview

Sielco Sistemi Winlog TCP/IP server contains a stack overflow vulnerability

I. Description

According to Sielco Sistemi's website: "Winlog is a software package for SCADA/HMI applications with web support, OPC client and a wide library of communication drivers and protocols for most PLCs (Siemens, Omron, Allen Bradley, Modbus, etc.)" Sielco Sistemi Winlog has the capability to accept remote connections by enabling the "Run TCP/IP server" option. The server listens on port 46823/tcp. A specially crafted packet from a remote attacker can cause a stack overflow possibly allowing an attacker to execute arbitrary code.

For additional information see ICS-CERT Advisory ICSA-11-017-02.

Public exploit code is available for this vulnerability.

II. Impact

A remote attacker can cause the device to crash and may be able to execute arbitrary code.

III. Solution

Upgrade


Sielco Sistemi recommends that users update their Winlog Lite and Winlog Pro to version 2.07.01.
Restrict Access

Enable firewall rules to restrict access for port 46823/tcp to only trusted sources.

Vendor Information

VendorStatusDate NotifiedDate Updated
SielcoAffected2011-01-19

References

http://www.us-cert.gov/control_systems/pdf/ICSA-11-017-02.pdf
http://www.exploit-db.com/exploits/15992/
http://www.sielcosistemi.com/download/WinlogLite_Setup.exe
http://www.sielcosistemi.com/download/Winlog_Setup_SF.exe

Credit

Thanks to Luigi Auriemma for reporting this vulnerability.

This document was written by Michael Orlando.

Other Information

Date Public:2011-01-17
Date First Published:2011-02-03
Date Last Updated:2011-02-03
CERT Advisory: 
CVE-ID(s):CVE-2011-0517
NVD-ID(s):CVE-2011-0517
US-CERT Technical Alerts: 
Severity Metric:1.10
Document Revision:13

Original Source

Url : http://www.kb.cert.org/vuls/id/496040

CWE : Common Weakness Enumeration

% Id Name
100 % CWE-119 Failure to Constrain Operations within the Bounds of a Memory Buffer

CPE : Common Platform Enumeration

TypeDescriptionCount
Application 21

Open Source Vulnerability Database (OSVDB)

Id Description
70418 Sielco Sistemi Winlog Pro TCP/IP Server Runtime.exe Packet Handling Remote Ov...

Winlog Pro is prone to an overflow condition. The TCP/IP Server fails to properly sanitize user-supplied input resulting in a stack-based buffer overflow. With a specially crafted packet sent to TCP port 46823, a remote attacker can potentially execute arbitrary code.

Snort® IPS/IDS

Date Description
2014-01-10 Sielco Sistemi Winlog Pro stack buffer overflow attempt
RuleID : 21491 - Revision : 7 - Type : PROTOCOL-SCADA