Date: Thu, 19 Feb 2004 9:4:25 -0800
From: Cisco Systems Product Security Incident Response Team <psirt@cisco.com.>
To: [email protected]Subject: Cisco Security Advisory: Cisco ONS 15327, ONS 15454, ONS 15454 SDH, and ONS 15600 Vulnerabilities
Cc: [email protected]
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Cisco Security Advisory: Cisco ONS 15327, ONS 15454, ONS 15454 SDH, and ONS
15600 Vulnerabilities
Revision 1.0
For Public Release 2004 February 19 1700 UTC (GMT)
----------------------------------------------------------------------
Contents
Summary
Affected Products
Details
Impact
Software Versions and Fixes
Obtaining Fixed Software
Workarounds
Exploitation and Public Announcements
Status of This Notice: FINAL
Distribution
Revision History
Cisco Security Procedures
----------------------------------------------------------------------
Summary
Multiple vulnerabilities exist in the Cisco ONS 15327 Edge Optical
Transport Platform, the Cisco ONS 15454 Optical Transport Platform, the
Cisco ONS 15454 SDH Multiplexer Platform, and the Cisco ONS 15600
Multiservice Switching Platform.
These vulnerabilities are documented as Cisco bug ID
CSCec17308/CSCec19124(tftp), CSCec17406(port 1080), and
CSCec66884/CSCec71157(SU access). There are workarounds available to
mitigate the effects of these vulnerabilities.
This advisory will be posted at
http://www.cisco.com/warp/public/707/cisco-sa-20040219-ONS.shtml .
Affected Products
* CSCec17308/CSCec19124(tftp)
+------------------------------------------+
| Product | Affected Releases |
|--------------------+---------------------|
| |4.1(0) to 4.1(2) |
|15327 | |
| |4.0(x) |
|--------------------+---------------------|
| |4.5(x) |
| | |
|15454, 15454 SDH |4.1(0) to 4.1(2) |
| | |
| |4.0(x) |
|--------------------+---------------------|
|15600 |1.0(x) |
+------------------------------------------+
* CSCec17406(port 1080)
+------------------------------------------+
| Product | Affected Releases |
|--------------------+---------------------|
| |4.1(0) |
|15327 | |
| |4.0(0) to 4.0(1) |
|--------------------+---------------------|
| |4.5(x) |
| | |
|15454, 15454 SDH |4.1(0) |
| | |
| |4.0(0) to 4.0(1) |
|--------------------+---------------------|
|15600 |Not Affected |
+------------------------------------------+
* CSCec66884/CSCec71157(SU access)
+------------------------------------------+
| Product | Affected Releases |
|-----------------+------------------------|
| |4.1(0) to 4.1(2) |
|15327 | |
| |4.0(x) |
|-----------------+------------------------|
| |4.5(x) |
| | |
|15454, 15454 SDH |4.1(0) to 4.1(2) |
| | |
| |4.0(x) |
|-----------------+------------------------|
|15600 |1.x(x) except for 1.1(1)|
+------------------------------------------+
Products not affected by these vulnerabilities include the Cisco ONS 15800
series, ONS 15500 series extended service platform, ONS 15302, ONS 15305,
ONS 15200 series metro DWDM systems, and the ONS 15190 series IP transport
concentrator.
Cisco ONS 15327 hardware running ONS Release 1.x(x) and 3.x(x) and Cisco
ONS 15454 hardware running ONS Releases 2.x(x) and 3.x(x) are not affected
by these vulnerabilities.
No other Cisco products are currently known to be affected by these
vulnerabilities.
To determine your software revision, view the Help > About window on the
CTC management software.
Details
The affected Cisco ONS 15327, ONS 15454, ONS 15454 SDH, and ONS 15600
hardware is managed through the XTC, TCC+/TCC2, TCCi/TCC2, and TSC control
cards respectively. These control cards are usually connected to a network
isolated from the Internet and local to the customer's environment. This
limits the exposure to the exploitation of the vulnerabilities from the
Internet.
* CSCec17308/CSCec19124(tftp)
The TFTP service on UDP port 69 is enabled by default to allow both
GET and PUT commands to be executed without any authentication. Using
a TFTP client, it is possible to connect to the optical device and
upload or retrieve ONS system files on the current active TCC in the
/flash0 or /flash1 directories. It is not possible to upload or
retrieve any user data files.
Cisco bug ID CSCec17308 documents the issue on the Cisco ONS 15327,
ONS 15454 and ONS 15454 SDH, and Cisco bug ID CSCec19124 documents the
issue on the Cisco ONS 15600 hardware.
* CSCec17406(port 1080)
The Cisco ONS 15327, ONS 15454 and ONS 15454 SDH hardware is
susceptible to an ACK Denial of Service (DoS) attack on TCP port 1080.
TCP port 1080 is used by network management applications to
communicate with the controller card. The controller card on the
optical device will reset under such an attack.
An ACK DoS attack is conducted by not sending the final ACK required
for a 3-way TCP handshake to complete, and instead sending an invalid
response to move the connection to an invalid TCP state.
The Cisco ONS 15600 Multiservice Switching Platform is not affected by
this vulnerability.
* CSCec66884/CSCec71157(SU access)
Telnet access to the underlying VxWorks operating system, by default,
is restricted to Superusers only. Due to this vulnerability, a
superuser whose account is locked out, disabled, or suspended is still
able to login (Telnet) into the VxWorks shell, using their previously
configured password.
Cisco bug ID CSCec66884 documents the issue on the Cisco ONS 15327,
ONS 15454 and ONS 15454 SDH, and Cisco bug ID CSCec71157 documents the
issue on the Cisco ONS 15600 hardware.
The Internetworking Terms and Cisco Systems Acronyms online guides can be
found at http://www.cisco.com/univercd/cc/td/doc/cisintwk/ .
These vulnerabilities are documented in the Cisco Bug Toolkit (registered
customers only) as Cisco bug IDs CSCec17308/CSCec19124(tftp),
CSCec17406(port 1080), and CSCec66884/CSCec71157(SU access). To access
this tool, you must be a registered user and you must be logged in.
Impact
* CSCec17308/CSCec19124(tftp) -- This vulnerability could be exploited
to launch a DoS attack on the optical device if corrupt ONS system
files were to be uploaded to the controller card.
* CSCec17406(port 1080) -- This vulnerability could be exploited to
launch a DoS attack on the optical device.
The timing for the data channels traversing the switch is provided by
the control cards.
On the Cisco ONS 15454, ONS 15327, and ONS 15454 SDH hardware,
whenever both the active and standby control cards are rebooting at
the same time, the synchronous data channels traversing the switch
drop traffic until the card reboots. Asynchronous data channels
traversing the switch are not impacted. Manageability functions
provided by the network element using the TCC+/TCC2, XTC, and
TCCi/TCC2 control cards are not available until the control card
reboots.
On the Cisco ONS 15600 hardware, whenever both the active and standby
control cards are rebooting at the same time, there is no impact to
the data channels traversing the switch because the TSC does a
software reset which does not impact the timing being provided by the
TSC for the data channels.
Manageability functions provided by the network element through the
TSC control cards are not available until the control card reboots.
* CSCec66884/CSCec71157(SU access) -- This vulnerability could be
exploited to gain unauthorized access to the optical device.
Software Versions and Fixes
* CSCec17308/CSCec19124(tftp)
+----------------------------------------+
| Product | Fixed Releases |
|----------------+-----------------------|
|15327 |4.1(3) and later |
|----------------+-----------------------|
|15454, 15454 SDH|4.6(1) and later, |
| |4.1(3) and later |
|----------------+-----------------------|
|15600 |1.3(0) and later, |
| |1.1(0) and later |
+----------------------------------------+
* CSCec17406(port 1080)
+----------------------------------------+
| Product | Fixed Releases |
|----------------+-----------------------|
|15327 |4.1(1) and later, |
| |4.0(2) and later |
|----------------+-----------------------|
| |4.6(1) and later, |
|15454, 15454 SDH|4.1(1) and later, |
| |4.0(2) and later |
|----------------+-----------------------|
|15600 |Not Affected |
+----------------------------------------+
* CSCec66884/CSCec71157(SU access)
+----------------------------------------+
| Product | Fixed Releases |
|----------------+-----------------------|
|15327 |4.1(3) and later |
|----------------+-----------------------|
|15454, 15454 SDH|4.6(1) and later, |
| |4.1(3) and later |
|----------------+-----------------------|
|15600 |1.1(1), 5.0 and later |
| |(when available) |
+----------------------------------------+
Cisco ONS Release 4.6(0) is not affected by these vulnerabilities. The
recommended release to upgrade to is Cisco ONS release 4.6(1).
Upgrade procedures can be found as indicated below.
* The procedure to upgrade to the fixed software version on the Cisco
ONS 15327 hardware is detailed at
http://www.cisco.com/univercd/cc/td/doc/product/ong/15327/327doc41/index.htm .
* The procedure to upgrade to the fixed software version on the Cisco
ONS 15454 hardware is detailed at
http://www.cisco.com/univercd/cc/td/doc/product/ong/15400/r46docs/index.htm .
* The procedure to upgrade to the fixed software version on the Cisco
ONS 15600 hardware is detailed at
http://cisco.com/univercd/cc/td/doc/product/ong/15600/index.htm .
Obtaining Fixed Software
Cisco is offering free software upgrades to address this vulnerability for
all affected customers.
Customers may only install and expect support for the feature sets they
have purchased. By installing, downloading, accessing or otherwise using
such software upgrades, Customers agree to be bound by the terms of
Cisco's software license terms found at
http://www.cisco.com/public/sw-license-agreement.html , or as otherwise set
forth at the Cisco Connection Online Software Center at
http://www.cisco.com/public/sw-center/sw-usingswc.shtml .
Customers with contracts should obtain upgraded software through their
regular update channels. For most customers, this means that upgrades
should be obtained through the Software Center on Cisco's worldwide
website at http://www.cisco.com/tacpage/sw-center/sw-optical.shtml . To
access the software download URL, you must be a registered user and you
must be logged in.
Customers whose Cisco products are provided or maintained through prior or
existing agreement with third-party support organizations such as Cisco
Partners, authorized resellers, or service providers should contact that
support organization for assistance with obtaining the software
upgrade(s).
Customers who purchase direct from Cisco but who do not hold a Cisco
service contract and customers who purchase through third-party vendors
but are unsuccessful at obtaining fixed software through their point of
sale should get their upgrades by contacting the Cisco Technical
Assistance Center (TAC) using the contact information listed below. In
these cases, customers are entitled to obtain an upgrade to a later
version of the same release or as indicated by the applicable corrected
software version in the Software Versions and Fixes section (noted above).
Cisco TAC contacts are as follows:
* +1 800 553 2447 (toll free from within North America)
* +1 408 526 7209 (toll call from anywhere in the world)
* e-mail: [email protected]
See http://www.cisco.com/warp/public/687/Directory/DirTAC.shtml for
additional TAC contact information, including special localized telephone
numbers and instructions and e-mail addresses for use in various
languages.
Please have your product serial number available and give the URL of this
notice as evidence of your entitlement to an upgrade. Upgrades for
non-contract customers must be requested through the TAC.
Please do not contact either "[email protected]" or
"[email protected]" for software upgrades.
Workarounds
There are mitigation workarounds available for these vulnerabilities. The
Cisco PSIRT recommends that affected users upgrade to a fixed software
version of code.
* CSCec17308/CSCec19124(tftp)
Use access control lists on routers and firewalls that are installed
in the network to allow only valid network management workstations to
gain TFTP access to the XTC, TCC+/TCC2, TCCi/TCC2, or TSC control
cards.
* CSCec17406(port 1080)
Use access control lists on routers and firewalls that are installed
in the network to allow only valid network management workstations to
gain TCP port 1080 access to the XTC, TCC+/TCC2, TCCi/TCC2, or TSC
control cards.
* CSCec66884/CSCec71157(SU access)
Use access control lists on routers and firewalls that are installed
in the network to allow only valid network management workstations to
gain login (Telnet) access to the XTC, TCC+/TCC2, TCCi/TCC2, or TSC
control cards.
Refer to http://www.cisco.com/warp/public/707/iacl.html for examples on
how to apply access control lists (ACLs) on Cisco routers.
Exploitation and Public Announcements
The Cisco PSIRT is not aware of any public announcements or malicious use
of the vulnerability described in this advisory.
These vulnerabilities were reported to PSIRT by Cisco customers or found
during internal testing.
Status of This Notice: FINAL
This is a final advisory. Although Cisco cannot guarantee the accuracy of
all statements in this advisory, all of the facts have been checked to the
best of our ability. Cisco 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, Cisco 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.
Distribution
This advisory will be posted on Cisco's worldwide website at
http://www.cisco.com/warp/public/707/cisco-sa-20040219-ONS.shtml .
In addition to worldwide web posting, a text version of this notice is
clear-signed with the Cisco PSIRT PGP key having the fingerprint 8C82 5207
0CA9 ED40 1DD2 EE2A 7B31 A8CF 32B6 B590 and is posted to the following
e-mail and Usenet news recipients.
* [email protected]
* [email protected] (includes CERT/CC)
* [email protected]
* [email protected]
* [email protected]
* [email protected]
* [email protected]
* [email protected]
* Various internal Cisco mailing lists
Future updates of this advisory, if any, will be placed on Cisco'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.
Revision History
+------------------------------------------+
| | |Initial |
|Revision 1.0|2004-February-19|public |
| | |release. |
+------------------------------------------+
Cisco Security Procedures
Complete information on reporting security vulnerabilities in Cisco
products, obtaining assistance with security incidents, and registering to
receive security information from Cisco, is available on Cisco's worldwide
website at
http://www.cisco.com/warp/public/707/sec_incident_response.shtml . This
includes instructions for press inquiries regarding Cisco security
notices. All Cisco security advisories are available at
http://www.cisco.com/go/psirt.
This advisory is copyright 2004 by Cisco Systems, Inc. This advisory may
be redistributed freely after the release date given at the top of the
text, provided that redistributed copies are complete and unmodified,
including all date and version information.
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