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Category:   Application (Generic)  >   NodeManager Vendors:   Mnet Soft Factory
NodeManager SNMP Buffer Overflow Lets Remote Users Execute Arbitrary Code
SecurityTracker Alert ID:  1012915
SecurityTracker URL:
CVE Reference:   GENERIC-MAP-NOMATCH   (Links to External Site)
Date:  Jan 17 2005
Impact:   Execution of arbitrary code via network, User access via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 2.00
Description:   Tan Chew Keong of SIG^2 Vulnerability Research reported a buffer overflow vulnerability in NodeManager. A remote user can execute arbitrary code on the target system.

A remote user can send a specially crafted SNMPv1 trap to trigger the buffer overflow and execute arbitrary code. For example, a remote user can send a LinkDown-Trap packet with an OCTET-STRING containing more than 512 bytes in the Trap variable-bindings field to trigger the stack overflow and overwrite the EIP register.

The vendor was notified on December 21, 2004.

The original advisory is available at:

Impact:   A remote user can execute arbitrary code on the target system.
Solution:   The vendor has released a fixed version (2.01), available at:

Vendor URL: (Links to External Site)
Cause:   Boundary error
Underlying OS:  Windows (2000), Windows (XP)

Message History:   None.

 Source Message Contents

Subject:  [SIG^2 G-TEC] NodeManager Professional V2.00 Buffer Overflow Vulnerability

SIG^2 Vulnerability Research Advisory

NodeManager Professional V2.00 Buffer Overflow Vulnerability

by Tan Chew Keong
Release Date: 17 Jan 2005



NodeManager Professional 
( is a network 
management and monitoring tool. It receives SNMPv1 traps and displays 
them on screen and writes them to a log file. NodeManager Professional 
V2.00 has a stack overflow vulnerability that can be exploited by 
sending a specially crafted SNMPv1 trap.


NodeManager Professional V2.00 on English Win2K SP4, WinXP SP1, SP2.


NodeManager Professional allows the user to use a format string to 
customize how each received SNMPv1 trap is logged. For example, the 
default format string for the LinkDown event is

"Snmp Trap LinkDown (EnterPrise=%EPRISE ObjectID=%OID Value=%DATA)"

When a LinkDown-Trap packet is received, the various placeholders (e.g. 
%OID, %DATA) will be replaced with the received values. When the format 
string is parsed, each received value is first copied to a 512-byte 
local stack buffer before it is concatenated to the final string. By 
sending a LinkDown-Trap packet containing an OCTET-STRING of more than 
512 bytes in the Trap variable-bindings field, it is possible to 
overflow the stack buffer and overwrite the EIP. This happens when the 
%DATA placeholder is processed.


Upgrade to version 2.01, which fixes this vulnerability.


20 Dec 04 - Vulnerability Discovered
21 Dec 04 - Initial Author Notification
22 Dec 04 - Received Author's Reply
07 Jan 05 - Second Author Notification
11 Jan 05 - Second Author Reply
15 Jan 05 - Author Released Fixed Version
17 Jan 05 - Public Release


All guys at SIG^2 G-TEC Lab

"IT Security...the Gathering. By enthusiasts for enthusiasts."

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