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20 June, 2002
Symantec Intruder Alert Denial of Service in the snmptrap.exe module


Symantec is aware of a reported denial-of-service (DoS) against the Symantec Intruder Alert (ITA) 3.6 SNMP agent, snmptrap.exe. By directing the PROTOS c06-snmpv1 test suite against the ITA Agent, the snmptrap.exe communicator, if so configured, can be halted until the service is reinitiated.

Components Affected
Symantec Intruder Alert 3.6

The CERT Coordination Center notified Symantec of a DoS issue with the snmptrap.exe communicator module that ships as a part of Symantec's Intruder Alert 3.6 HIDS package. The snmptrap.exe communicator module allows integrated communications between the Symantec NetProwler NIDS and the Symantec ITA HIDS products. The functionality of the snmptrap.exe allows smooth integrated alert management of both NIDS and HIDS from a single administrator console.

During internal network testing using the PROTOS c06-snmpv1 test suite directed against the ITA agent, the snmptrap.exe communicator module crashes, disrupting the communications between NetProwler and ITA.

Symantec Response
Symantec verified that the snmptrap.exe on the Intruder Alert (ITA) 3.6 agent, if configured to accept SNMP traps from Symantec NetProwler, is susceptible to a communications DoS when attacked using the PROTOS test suite. However, recommended usage for the SNMP trap collector is to install the module on the customer's internal network while blocking SNMP trap communications through the firewall from external networks. With this configuration the snmptrap.exe module is only vulnerable to an attack initiated on the customers internal network.

A successful attack will halt the communicator service, the halt will be logged, and the service then requires a restart to reinitiate communications. Halting the communicator module disrupts the integrated communications only. Both the Symantec NetProwler and the Symantec ITA IDS systems continue to function normally but require monitoring from separate consoles until the communicator service is restarted.

Symantec takes any product issue such as this very seriously. We have developed a patch for Symantec ITA 3.6 to address this problem. The patch is available to Symantec ITA 3.6 customers from the Symantec customer ITA ftp download site as ITA3_6Patch1/061302/. There is a separate patch available for domestic and international releases.

As a best practice, Symantec recommends keeping all operating systems and applications updated with the latest vendor patches. Keeping mission-critical systems updated with all security patches applied reduces risk exposure.

The Common Vulnerabilities and Exposures (CVE) initiative has assigned the name CAN-2002-0012 to the PROTOS test suite SNMPv1 trap handling issue.

These are candidates for inclusion in the CVE list (http://cve.mitre.org), which standardizes names for security problems.

Symantec takes the security and proper functionality of our products very seriously. As founding members of the Organization for Internet Safety (OISafety), Symantec supports and follows the principles of responsible disclosure. Symantec also subscribes to the vulnerability disclosure guidelines outlined by the National Infrastructure Advisory Council (NIAC).

Please contact secure@symantec.com if you feel you have discovered a security issue in a Symantec product. A Symantec Product Security team member will contact you regarding your submission. Symantec strongly recommends using encrypted email for reporting vulnerability information to secure@symantec.com. The Symantec Product Security PGP key can be found at the end of this message.

Symantec has developed a Product Vulnerability Response document outlining the process we follow in addressing suspected vulnerabilities in our products. This document is available below.

PDF Symantec Vulnerability Response Policy PGP Symantec Product Vulnerability Management PGP Key

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Last modified on: Saturday, 17-Sep-05 09:49:19