Vulnerability Note VU#648304

Sun Solaris DMI to SNMP mapper daemon snmpXdmid contains buffer overflow

Overview

There is a buffer overflow in the snmpXdmi daemon, which may allow intruders to gain root privileges on systems running the vulnerable daemon.

I. Description

The SNMP-to-DMI mapper daemon (snmpXdmi) translates Simple Network Management Protocol (SNMP) events to Desktop Management Interface (DMI) indications and vice-versa. Both protocols serve a similar purpose, and the translation daemon allows users to manage devices using either protocol. The snmpXdmi daemon registers itself with the snmpdx and dmid daemons, translating and forwarding requests from one daemon to the other. The snmpXdmi daemon, which is shipped with Solaris versions 2.6, 7 and 8, is enabled by default.

The snmpXdmi daemon contains a buffer overflow in the code for translating DMI indications to SNMP events. This buffer overflow is exploitable by remote intruders to gain root privileges.

More information about this vulnerability can be found in the advisory published by Job de Haas of ITSX:

http://www.itsx.com/snmpXdmid.html

II. Impact

A remote intruder who is able to send packets to the snmpXdmi daemon may be able to gain root privileges on that system.

III. Solution

Apply a Patch

Apply a patch from Sun when it is available.

Disable snmpXdmi

Sites that do not use both SNMP and DMI should disable the translation daemon, thus eliminating the vulnerability.

Restrict Access to snmpXdmi and other RPC services

Sites that require the functionality of snmpXdmi or other RPC services should restrict access through filtering. Local IP filtering rules that prevent hosts other than localhost from connecting to the daemon may mitigate the risks associated with running the daemon. Sun RPC services are advertised on port 111/{tcp,udp}. The snmpXdmid RPC service id is 100249; use 'rpcinfo -p' to list local site port bindings:

# rpcinfo -p | grep 100249 100249 1 udp 32785 100249 1 tcp 32786

Note that site-specific port binding will vary.

Systems Affected

Vendor	Status	Date Updated
Sun	Vulnerable	14-Sep-2001

References

http://www.itsx.com/snmpXdmid.html
http://www.securityfocus.com/bid/2417
http://www.securityfocus.com/archive/1/168936
http://www.sun.com/software/entagents/download/
http://www.sun.com/software/entagents/docs/UGhtml/snmp_with_dmi.doc.html
http://www.dmtf.org/spec/spec.html
http://www.dmtf.org/spec/snmp.html
http://www.ciac.org/ciac/bulletins/l-065.shtml

Credit

Thanks to Job de Haas (job@itsx.com) of ITSX BV Amsterdam, The Netherlands (http://www.itsx.com) for reporting this vulnerability to the CERT/CC.

This document was written by Cory F. Cohen.

Other Information

Date Public	03/15/2001
Date First Published	03/26/2001 10:49:01 AM
Date Last Updated	09/14/2001
CERT Advisory	CA-2001-05
CVE Name	CAN-2001-0236
US-CERT Technical Alerts
Metric	14.06
Document Revision	21

If you have feedback, comments, or additional information about this vulnerability, please send us email.

Get Adobe Reader