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AUSCERT External Security Bulletin Redistribution
ESB-2002.083 -- Compaq Security Advisory (SSRT0799)
Potential Security Vulnerabilities in SNMP
19 February 2002
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AusCERT Security Bulletin Summary
---------------------------------
Product: Compaq NonStop Himalaya Servers
Compaq TCP/IP Services for OpenVMS
Compaq Tru64 UNIX
Compaq Insight Management Suite
Compaq Deskpro, Professional Workstation, Armada, Evo
Compaq SANworks
Vendor: Compaq
Impact: Execute Arbitrary Code/Commands
Denial of Service
Access Required: Remote
Ref: AL-2002.02
ESB-2002.065
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TITLE: (SSRT0799) Potential Security Vulnerabilities in SNMP
Posted at http://ftp.support.compaq.com/patches/.new/security.shtml
NOTICE: There are no restrictions for distribution of this
Bulletin provided that it remains complete and intact.
RELEASE DATE: 18 FEBRUARY, 2002
SEVERITY: MEDIUM
SOURCE: Compaq Computer Corporation
Compaq Global Services
Software Security Response Team
CROSS REFERENCE: (SSRT0799, CAN-2002-0012,
CAN-2002-0013, CERT CA-2002-03)
PROBLEM SUMMARY:
The Computer Emergency Response Team (CERT/cc) has recently issued an
advisory regarding numerous potential vulnerabilities in SNMPv1
implementations. These potential vulnerabilities are applicable to
SNMPv1 trap handling and SNMPv1 Request handling. The CERT article
outlines vulnerabilities that can cause SNMP services to stop
functioning and in some cases may enable "unauthorized access,"
"denial of service attacks" or may cause system instability.
IMPACT:
Compaq NonStop Himalaya Servers:
Compaq TCP/IP Services for OpenVMS:
Compaq Tru64 UNIX:
Compaq Insight Management Suite:
Compaq Deskpro, Professional Workstation, Armada, Evo:
Compaq SANworks:
Compaq's findings to date regarding the SNMPv1 issues are as
follows:
________________________________
Compaq NonStop Himalaya Servers:
The Compaq Himalaya NonStop Kernel prohibits execution of code on the
stack or heap by hardware TLB permissions (read/write only),
preventing Trojan horse attacks by embedding code within the buffer
overflow area. However, process ABENDs can occur.
The SNMP agent ABENDs in the c06-snmpv1 buffer-overflow tests.
This affects forwarding trap messages and/or sending info responses
to SNMP managers.
Sub-agents use IPCs to communicate with the SNMP agent, so they
cannot be directly attacked. More importantly, sub-agents are
confined to information only requests, so they cannot be used to
configure/manage their sub-systems. Our investigation an analysis is
continuing and further updates will be provided.
RESOLUTION:
IPMs to address the ABEND problem of the SNMP are in development
and will be released as soon as verification is complete. Updates
to include availability of these IPMs will be included in future
updates.
__________________________________
Compaq TCP/IP Services for OpenVMS:
There is some impact to the SNMP agent provided with Compaq TCP/IP
Services for OpenVMS. This problem can cause the SNMP agent to ACCVIO
and terminate temporarily denying service to SNMP, but in most cases
after this occurs Compaq TCP/IP Services for OpenVMS will restart
the SNMP agent in response to the next SNMP request. There are no
known risks of compromising system security due to this problem.
The SNMP agent executes from a non-privileged process, which
prevents any compromise to system security.
RESOLUTION:
Our investigation and analysis has determined the cause of the
problem. The updated images for Compaq TCP/IP Services for OpenVMS
are now in final test. Compaq will provide updates to Compaq TCP/IP
Services for OpenVMS in the next ECO and also in the next release,
Compaq TCP/IP Services for OpenVMS V5.3. Contact Compaq's Customer
Support Center if an earlier updated is required.
__________________
Compaq Tru64 UNIX:
There is some impact to the SNMP agent provided with Tru64 UNIX. This
problem can cause the SNMP agent to suffer a segmentation fault,
generate a core file and exit, denying SNMP service to SNMP-based
network management applications. There are no known risks of
compromising system security due to this problem. We do not believe
this can cause the system to be unstable, vulnerable to 'unauthorized
access" nor be the cause of any other denial of service (except of
course to the SNMP service).
RESOLUTION:
Until a fix is implemented, users will have to manually restart
snmpd. Our investigation and analysis has determined the cause of the
problem. The updated images are now in final test. When completed,
Compaq will provide patches to all impacted versions of Tru64 UNIX
4.0f, 4.0g, 5.0a, 5.1, 5.1a.
________________________________
Compaq Insight Management Suite:
(ProLiants running industry standard operating systems including
Windows 2000, NetWare, Linux, etc)
The Compaq Insight Management Suite utilizes SNMP as a primary
communications method. Fixes to the operating systems affected will
be provided by the vendors involved. Check
http://www.compaq.com/manage/security the most up-to-date
information.
_______________________________________________
Deskpro, Professional Workstation, Armada, Evo:
The Deskpro, Professional Workstation, Armada, Evo(Microsoft
operating
systems including Windows XP, Windows 2000, Windows 98, and Windows
95) Compaq Management Agents for Clients utilizes SNMP as an optional
communications method. Fixes to the operating systems affected will
be provided by Microsoft. Check
www.microsoft.com/technet/security/bulletin/MS02-006.asp for the most
up-to-date information.
_____________________________________
Compaq SANworks Management Appliance:
The SANworks management appliance is essentially a Compaq server and
our recommended configuration does not have it connected directly to
the internet. Therefore, it is less exposed than other servers to
external SNMP security attacks. However, the appliance is
susceptible to SNMP security attacks from inside the firewall that
could result in the graceful termination of some storage management
applications on the appliance.
Compaq will provide a patch to the appliance as soon as possible.
____________________________________________________________________
NOTE:
Many systems operate behind firewalls and would normally
implement SNMP blocking for SNMP as standard procedure. Based on SNMP
blocking and ingress/egress filtering, the potential Security
vulnerability may only be exploited by users who have access to your
local security domain, therefore the risk is diminished.
SUPPORT:
This advisory bulletin will be updated for the various
products requiring patches and individual patch notifications
will be done through standard "patch notification" procedures
for those products. For further information, contact your normal
Compaq Support channel.
SUBSCRIBE:
To subscribe to automatically receive future Security
Advisories from the Compaq's Software Security Response Team via
electronic mail:
http://www.support.compaq.com/patches/mailing-list.shtml
REPORT:
To report a potential security vulnerability with any Compaq
supported product, send email to: security-ssrt@compaq.com
Compaq appreciates your cooperation and patience. As always,
Compaq urges you to periodically review your system management
and security procedures. Compaq will continue to review and
enhance the security features of its products and work with
our customers to maintain and improve the security and integrity
of their systems.
"Compaq is broadly distributing this Security Bulletin in order to
bring to the attention of users of the affected Compaq products the
important security information contained in this Bulletin.
Compaq recommends that all users determine the applicability of
this information to their individual situations and take appropriate
action. Compaq does not warrant that this information is necessarily
accurate or complete for all user situations and, consequently,
Compaq will not be responsible for any damages resulting from
user's use or disregard of the information provided in this
Bulletin."
Copyright 2002 Compaq Information Technologies Group, L.P.
Compaq shall not be liable for technical or editorial errors
or omissions contained herein. The information in this document
is subject to change without notice. Compaq and the names of
Compaq products referenced herein are, either, trademarks
and/or service marks or registered trademarks and/or service
marks of Compaq Information Technologies Group, L.P. Other product
and company names mentioned herein may be trademarks and/or service
marks of their respective owners.
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