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APC Security Advisory - Static factory password vulnerability

Who should read this:

Customers with products that have APC's hardware-based network

management cards installed. APC products that use these cards to

attach to the network via a direct ethernet or token ring connection,

or via a console port server, may be affected (see "How to Determine

if Your Model Is Affected" for more detail).

Problem Summary:

APC's hardware-based network management cards could be compromised by

non-privileged users via Telnet or the local serial port using a

static factory password. This vulnerability was reported by a

customer. APC is not aware of any malicious use of the vulnerability

prior to this disclosure.

Impact:

The exploitation of this issue can result in unauthorized control of

these devices.

Mitigating Factors :

- - APC Network Management Cards (models AP9617, AP9618, and AP9619)

using AOS v2.0.0 (apc_hw02_aos_200.bin) and later are NOT

vulnerable via the network port (Telnet or SSH).

- - Many firewalls typically block Telnet (well-known port 23) limiting

the scope of the vulnerability to intranets.

- - Vulnerability via the local serial port requires physical access

unless it is connected to a console port server or similar device.

- - Web and SNMP interfaces are not affected.

How To Determine If Your Model Is Affected:

1. Examine the products listed below. If your UPS or other device

has an AP9606, AP9617, AP9618, or AP9619 card installed then APC

recommends you upgrade the card's firmware. Note that in some

instances a firmware upgrade requires updating two files, the AOS

card operating system and the application file for the device the

card is installed in.

2. If you are not sure whether your UPS or device has one of these

cards installed, examine the unit's faceplate for the following:

AP9606 Web/SNMP Management Card

AP9617 Network Management Card EX

AP9618 Network Management Card EM/MDM

AP9619 Network Management Card EM

Your device may still contain a network management card, please refer

to your user manual for further information.

3. This advisory does not apply to any products based on Network

Management Card-based AOS revision apc_hw02_aos_212a.bin and later.

Recommendations:

Find your product in the tables below and determine if you have

an affected revision. If your product is affected then download and

apply an update patch.

You may upgrade to a newer application revision that has been

fixed or stay at the same application revision for those that

are listed. Only devices with network support are affected.

Update patches can be downloaded directly from APC's web site at:

http://www.apc.com/go/direct/index.cfm?tag=sa2988_patch

If for some reason an update patch cannot be applied then:

A. Disable Telnet protocol until a patch can be applied (see appendix

A for instructions). If this is not possible then disconnect the

product from the network until a patch can be applied.

B. If a console port server is connected to a vulnerable product's

local serial port then ensure that the console port server forces

user authentication prior to allowing login to the product. If this

is not possible then disconnect the product from the console port

server until a patch can be applied.

- ---------------------------------------------------------------------

NMC-enabled Affected Fixed In

Product Description AOS Rev APP Rev AOS Rev APP Rev

- ---------------------------------------------------------------------

Smart-UPS aos 105 sumx 105 aos 107b sumx 105

115 115 118c 115

125 120 126b 120

125 125 126b 125

211 210 212a 210

Symmetra, Symmetra RM aos 105 sy 105 aos 107b sy 105

115 116 118c 116

120 120 126b 120

211 210 212a 210

Symmetra PX aos 105 sy3p 105 aos 107b sy3p 105

115 115 118c 115

211 210 212a 210

Silcon aos 105 dp3e 105 aos 107b dp3e 105

115 116 118c 116

Automatic Transfer Switch aos 105 ats 106 aos 107b ats 106

DC Systems Products (MX28B) aos 106 mx28 110 aos 107b mx28 110

Switched Rack PDU aos 116 rpdu 102 aos 118c rpdu 102

MasterSwitch Plus aos 116 msp 100 aos 118c msp 100

Note: The AOS and APP firmware revisions listed in this table are

shorthand for the full filename found from the download page. The

full filenames will be apc_hw02_AOS_REV.bin and

apc_hw02_APP_REV.bin.

Zipped versions of both AOS and APP revsions are availiable for all

combinations. The full filenames for the zipped versions will be

apc_hw02_AOSREV_APPREV.exe.

If your firmware revision is not listed, please upgrade to the

latest fixed revision.

- ---------------------------------------------------------------------

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AP9606-enabled Affected Fixed In

Product Description AOS Rev APP Rev AOS Rev APP Rev

- ---------------------------------------------------------------------

Smart-UPS all earlier revs aos 326b sumx 326a

Symmetra all earlier revs aos 326b sy 326a

Silcon all earlier revs aos 326b dp3e 326a

DC Systems Products (MX28B) all earlier revs aos 306b dm3k 105a

Environmental Monitoring Unit all earlier revs aos 326b em 205a

MasterSwitch (all) all earlier revs aos 309a ms 225a

MasterSwitch Plus all earlier revs aos 258b msp 205a

MasterSwitch VM all earlier revs aos 258b msvm 115a

Note: The AOS and APP firmware revisions listed in this table are

shorthand for the full filename found from the download page. The

full filenames will be AOSREV.bin and APPREV.bin.

If your firmware revision is not listed, please upgrade to the

latest fixed revision.

- ---------------------------------------------------------------------

Patches will not be provided for these products:

SmartSlot SNMP Management Adapter (AP9605)

External SNMP Management Adapter(AP9205)

Token Ring Management Card (AP9603)

APC recommends that you disable any Telnet interface if present or

remove the network connection from the card.

All other APC product families are unaffected.

Exploitation and Public Announcements:

APC is not aware of any malicious use of the vulnerability described

in this advisory. The vulnerability described in this advisory was

originally found by Dave Tarbott.

Status of this notice: INTERIM

THIS IS AN INTERIM ADVISORY. ALTHOUGH APC CANNOT GAURANTEE THE

ACCURACY OF ALL STATEMENTS IN THIS NOTICE, ALL OF THE FACTS HAVE BEEN

CHECKED TO THE BEST OF OUR ABILITY. APC DOES NOT ANTICIPATE ISSUING

UPDATED VERSIONS OF THIS ADVISORY UNLESS THERE IS SOME MATERIAL

CHANGE IN THE FACTS. SHOULD THERE BE A SIGNIFICANT CHANGE IN THE

FACTS, APC MAY UPDATE THIS ADVISORY. A STAND-ALONE COPY OR

PARAPHRASE OF THE TEXT OF THIS SECURITY ADVISORY THAT OMITS THE

DISTRIBUTION URL IN THE FOLLOWING SECTION IS AN UNCONTROLLED COPY,

AND MAY LACK IMPORTANT INFORMATION OR CONTAIN FACTUAL ERRORS.

IN NO EVENT SHALL EITHER APC, ITS OFFICERS, DIRECTORS, AFFILIATES OR

EMPLOYEES, BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL, OR

CONSEQUENTIAL DAMAGES OF ANY KIND INCLUDING, BUT NO LIMITED TO, LOSS

OF PROFITS ARSING OUT OF THE USE OR IMPLEMENTATION OF THE

INFORMATION CONTAINED HEREIN HOWEVER CAUSED AND ON ANY THEORY OF

LIABILITY, WHETHER IN AN ACTION FOR CONTRACT, STRICT LIABILITY OR

TORT (INCLUDING NEGLIGENCE) OR OTHERWISE, WHETHER OR NOT APC HAS

BEEN ADVISED OR THE POSSIBILITY OF SUCH DAMAGE AND NOTWITHSTANDING

THE FAILURE OF ESSENTIAL PURPOSE OF ANY REMEDY.

Distribution:

This advisory will be posted on APC's worldwide website at:

http://www.apc.com/go/direct/index.cfm?tag=sa2988

Future updates of this advisory, if any, will be place on APC's

worldwide website, but may or may not be actively announced on

mailing lists or newsgroups. Users concerned about this problem are

encouraged to check the above URL for any updates.

Revisions:

Revision 1.0

2003-February-18

Initial Public Release

References:

http://www.oit.duke.edu/security/encryption/

Copyright:

This notice is Copyright 2004 by APC. This notice may be

redistributed freely after the release date given at the top of the

text, provided that redistributed copies are complete and unmodified,

and include all date and version information.

Appendix A - Instructions for disabling Telnet access:

To disable telnet from the HTML interface for all network products:

Login to the Web interface using the administrator account

Choose Network in the navigation menu

Choose Telnet sub-option in the navigation menu

Select Disable Telnet Access, click Apply

Click the Logout link in the navigation menu

Telnet is now disabled

To disable telnet from the Telnet interface for all network products:

Login to the Telnet interface using the administrator account

Choose Network from the menu

Choose Telnet from the menu

Choose Access from the menu

Choose Disable from the selections

Choose Accept Changes from the menu

Type <ESC> twice to return to main menu

Choose logout from the menu

Telnet is now disabled

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