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Cisco Security Advisory: Cisco ONS15454, ONS15327, ONS15454SDH, and ONS15600
Nessus Vulnerabilities
Revision 1.0
For Public Release 2003 May 01 at 1600 UTC (GMT)
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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
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Summary
Nessus exposes FTP and Telnet vulnerabilities in the Cisco ONS15454
Optical Transport Platform, the Cisco ONS15327 Edge Optical Transport
Platform, the Cisco ONS15454SDH Multiplexer Platform, and the Cisco
ONS15600 Multiservice Switching Platform. Cisco ONS15454 hardware running
ONS Releases 3.0 through Release 3.4.1, Cisco ONS15327 and ONS15454SDH
hardware running ONS Releases 3.3 through Release 3.4.1, and Cisco
ONS15600 hardware running ONS Release 1.0 is affected by these
vulnerabilities. Nessus is a free security scanner software available from
nessus.org.
These vulnerabilities are documented as Cisco Bug IDs CSCdz83515 and
CSCdz83519. 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-20030501-ons.shtml.
Affected Products
* Cisco ONS15454 hardware running ONS Releases 3.0 through Release 3.4.1
* Cisco ONS15327 and Cisco ONS15454SDH hardware running ONS Releases 3.3
through Release 3.4.1
* Cisco ONS15600 hardware running ONS Release 1.0
Products not affected by these vulnerabilities are listed below.
* Cisco ONS15454 hardware running ONS Releases 4.0 and 2.x
* Cisco ONS15327 hardware running ONS Release 4.0 and Release 1.x
* Cisco ONS15454SDH hardware running ONS Release 4.0
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 network management software.
Details
The affected Cisco ONS15454, ONS15327, ONS15454SDH, and ONS15600 hardware
is managed via the TCC+, XTC, TCCi, 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.
+------------------------------------------+
|DDTS - Description| Details |
|------------------+-----------------------|
| |By making an invalid |
| |FTP request, a person |
| |may cause the TCC+, |
|CSCdz83515 - TCC+ |XTC, TCCi, or TSC |
|reboots on Nessus |control cards to reset.|
|VxWorks FTP DoS |Repeated invalid |
|script |requests would cause |
| |both the control cards |
| |to be reset at the same|
| |time. |
|------------------+-----------------------|
| |By making an invalid |
| |Telnet request, a |
| |person may cause the |
|CSCdz83519 - TCC+ |TCC+, XTC, TCCi, or TSC|
|reboots on Nessus |control cards to reset.|
|VxWorks binlogin |Repeated invalid |
|overflow script |requests would cause |
| |both the control cards |
| |to be reset at the same|
| |time. |
+------------------------------------------+
These vulnerabilities are documented as Bug IDs CSCdz83515 and CSCdz83519.
Details can be viewed after 2003 May 02 by accessing the Cisco Bug Toolkit
The Internetworking Terms and Cisco Systems Acronyms online guides can be
found at http://www.cisco.com/univercd/cc/td/doc/cisintwk/.
Impact
The timing for the data channels traversing the switch is provided by the
control cards.
On the Cisco ONS15454, ONS15327, and ONS15454SDH hardware platforms,
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 via the TCC+, XTC, and TCCi control cards are not available until
the control card reboots.
On the Cisco ONS15600 hardware platforms, 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 via
the TSC control cards are not available until the control card reboots.
Software Versions and Fixes
All these vulnerabilities for the ONS15454, ONS15327, and ONS15454SDH
platforms are fixed in the Cisco ONS software Releases 4.0 and later for
the affected platforms.
All these vulnerabilities for the ONS15600 platforms are fixed in the
Cisco ONS software Release 1.1, which will be available in September 2003.
Upgrade procedures can be found as indicated below.
* The procedure to upgrade to the fixed software version on the Cisco
ONS15454 hardware is detailed at
http://www.cisco.com/univercd/cc/td/doc/product/ong/15400/r40docs/sftupgrd/index.htm.
* The procedure to upgrade to the fixed software version on the Cisco
ONS15327 hardware is detailed at
http://www.cisco.com/univercd/cc/td/doc/product/ong/15327/327doc40/index.htm.
* The procedure to upgrade to the fixed software version on the Cisco
ONS1600 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 these vulnerabilities
for all affected customers. Customers may only install and expect support
for the feature sets they have purchased.
Customers with service contracts should contact their regular update
channels to obtain the free software upgrade identified via this advisory.
For most customers with service contracts, 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 (registered
customers only) .
Customers whose Cisco products are provided or maintained through a 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 free software
upgrade(s).
Customers who purchased directly 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 obtain fixed software 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).
* +1 800 553 2447 (toll free from within North America)
* +1 408 526 7209 (toll call from anywhere in the world)
* e-mail: tacat_private
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
advisory as evidence of your entitlement to a free upgrade.
Please do not contact either "psirtat_private" or
"security-alertat_private" for software upgrades.
Workarounds
The Cisco PSIRT recommends that affected users upgrade to a fixed software
version of code as soon as possible.
Use Unicast Reverse Path Forwarding and access control lists on routers
and firewalls to allow only valid network management workstations gain FTP
and Telnet access to the TCC+, XTC, TCCi, or TSC control cards.
Exploitation and Public Announcements
The Cisco PSIRT is not aware of any public announcements or malicious use
of the vulnerabilities described in this advisory.
These vulnerabilities were reported to PSIRT by internal development
testing and customers.
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-20030501-ons.shtml.
In addition to worldwide website posting, a text version of this advisory
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.
* cust-security-announceat_private
* bugtraqat_private
* first-teamsat_private (includes CERT/CC)
* vulnwatchat_private
* ciscoat_private
* cisco-nspat_private
* full-disclosureat_private
* comp.dcom.sys.ciscoat_private
* 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
+------------------------------------------+
|Revision 1.0|2003-May-01|Initial 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.
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This notice is Copyright 2003 by Cisco Systems, Inc. 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.
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