__________________________________________________________
The U.S. Department of Energy
Computer Incident Advisory Center
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/ | /_\ /
\___ __|__ / \ \___
__________________________________________________________
INFORMATION BULLETIN
Cisco IOS HTTP Authorization Vulnerability
July 5, 2001 17:00 GMT Number L-106
______________________________________________________________________________
PROBLEM: When HTTP server is enabled and local authorization is used, it
is possible to bypass the authentication and execute any
command on the device.
PLATFORM: Those running all releases of Cisco IOS(R) software, starting
with release 11.3 and later.
DAMAGE: The user will be able to exercise complete control over the
device. All commands will be executed with the highest
privilege (level 15).
SOLUTION: Upgrade or apply the workaround given in the Cisco advisory.
______________________________________________________________________________
VULNERABILITY The vulnerability is MEDIUM. Though the exploit has been
ASSESSMENT: discussed in public forums, both the HTTP server must be
enabled and local authorization be used in order to be
vulnerable.
______________________________________________________________________________
[Start Cisco Systems Inc. Advisory]
Cisco - Security Advisory: IOS HTTP Authorization Vulnerability
Cisco Security Advisory: IOS HTTP Authorization Vulnerability
Revision 1.2
For Public Release 2001 June 27 08:00 (UTC -0800)
Summary
When HTTP server is enabled and local authorization is used, it is possible,
under some circumstances, to bypass the authentication and execute any command
on the device. In that case, the user will be able to exercise complete control
over the device. All commands will be executed with the highest privilege (level
15).
All releases of Cisco IOS® software, starting with release 11.3 and later, are
vulnerable. Virtually all mainstream Cisco routers and switches running Cisco
IOS software are affected by this vulnerability.
Products that are not running Cisco IOS software are not vulnerable.
The workaround for this vulnerability is to disable HTTP server on the router or
to use Terminal Access Controller Access Control System (TACACS+) or Radius for
authentication.
This advisory will be posted at
http://www.cisco.com/warp/public/707/IOS-httplevel-pub.html.
Affected Products
Any device running Cisco IOS software release 11.3 and later is vulnerable.
Cisco devices that may be running with affected Cisco IOS software releases
include, but are not limited to:
*) Cisco routers in the AGS/MGS/CGS/AGS+, IGS, RSM, 800, ubr900, 1000, 1400,
1500, 1600, 1700, 2500, 2600, 3000, 3600, 3800, 4000, 4500, 4700, AS5200,
AS5300, AS5800, 6400, 7000, 7100, 7200, ubr7200, 7500, and 12000 series.
*) Most recent versions of the LS1010 ATM switch.
*) The Catalyst 6000 if it is running Cisco IOS software.
*) The Catalyst 2900XL LAN switch only if it is running Cisco IOS software.
*) The Catalyst 1900, 2800, 2900, 3000, and 5000 series LAN switches are
affected.
*) The Cisco Distributed Director.
For some products, the affected software releases are relatively new and may not
be available on every device listed above.
If you are not running Cisco IOS software, you are not affected by this
vulnerability.
Cisco products that do not run Cisco IOS software and are not affected by this
defect include, but are not limited to:
*) 700 series dial-up routers (750, 760, and 770 series).
*) The Catalyst 6000 is not affected if it is not running Cisco IOS software.
*) WAN switching products in the IGX and BPX lines.
*) The MGX (formerly known as the AXIS shelf).
*) Host-based software.
*) The Cisco PIX Firewall.
*) The Cisco Local Director.
*) The Cisco Cache Engine.
No other Cisco products are affected.
Details
By sending a crafted URL it is possible to bypass authentication and execute any
command on the router at level 15 (enable level, the most privileged level).
This will happen only if the user is using a local database for authentication
(usernames and passwords are defined on the device itself). The same URL will
not be effective against every Cisco IOS software release and hardware
combination. However, there are only 84 different combinations to try, so it
would be easy for an attacker to test them all in a short period of time.
The URL in question follows this format:
http://<device_addres>/level/xx/exec/....
Where xx is a number between 16 and 99.
This vulnerability is documented as Cisco Bug ID CSCdt93862.
Impact
An attacker can exercise complete control over the device. By exploiting this
vulnerability, the attacker can see and change the configuration of the device.
Software Versions and Fixes
Each row of the table describes a release train and the platforms or products
for which it is intended. If a given release train is vulnerable, then the
earliest possible releases that contain the fix and the anticipated date of
availability for each are listed in the "Rebuild", "Interim", and "Maintenance"
columns. A device running any release in the given train that is earlier than
the release in a specific column (less than the earliest fixed release) is known
to be vulnerable, and it should be upgraded at least to the indicated release or
a later version (greater than the earliest fixed release label).
When selecting a release, keep in mind the following definitions:
Maintenance
Most heavily tested and highly recommended release of any label in a given
row of the table.
Rebuild
Constructed from the previous maintenance or major release in the same
train, it contains the fix for a specific defect. Although it receives less
testing, it contains only the minimal changes necessary to effect the
repair.
Interim
Built at regular intervals between maintenance releases and receives less
testing. Interims should be selected only if there is no other suitable
release that addresses the vulnerability, and interim images should be
upgraded to the next available maintenance release as soon as possible.
Interim releases are not available via manufacturing, and usually they are
not available for customer download from CCO without prior arrangement with
the Cisco TAC.
In all cases, customers should exercise caution to be certain the devices to be
upgraded contain sufficient memory and that current hardware and software
configurations will continue to be supported properly by the new release. If the
information is not clear, contact the Cisco TAC for assistance as shown in the
following section.
More information on Cisco IOS software release names and abbreviations is
available at http://www.cisco.com/warp/public/620/1.html.
+---------------+----------------+-----------------------------------------+
| | Description of | |
| Train | Image or | Availability of Fixed Releases* |
| | Platform | |
+---------------+----------------+-------------+------------+--------------+
|11.0-based Releases and Earlier | Rebuild | Interim** | Maintenance |
+---------------+----------------+-------------+------------+--------------+
| |Multiple | |
| 10.3 |releases and |Not affected |
| |platforms | |
+---------------+----------------+-----------------------------------------+
| |Multiple | |
| 11.0 |releases and |Not affected |
| |platforms | |
+---------------+----------------+-------------+------------+--------------+
| 11.1-based Releases | Rebuild | Interim** | Maintenance |
+---------------+----------------+-------------+------------+--------------+
| |Major release | |
| 11.1 |for all |Not affected |
| |platforms | |
+---------------+----------------+-------------+------------+--------------+
| 11.2-based Releases | Rebuild | Interim** | Maintenance |
+---------------+----------------+-------------+------------+--------------+
| |Major release |End of Engineering |
| 11.2 |for all +-----------------------------------------+
| |platforms |Not affected |
+---------------+----------------+-------------+------------+--------------+
| 11.3-based Releases | Rebuild | Interim** | Maintenance |
+---------------+----------------+-------------+------------+--------------+
| |Major release |End of Engineering |
| 11.3 |for all +-----------------------------------------+
| |platforms |Upgrade recommended to 12.0(18) |
+---------------+----------------+-----------------------------------------+
| |ED for dial | |
| |platforms and |Not Scheduled |
| 11.3AA |access servers +-----------------------------------------+
| |5800, 5200, |Upgrade recommended to 12.1(9) |
| |5300, 7200 | |
+---------------+----------------+-----------------------------------------+
| |Early deployment|End of Engineering |
| 11.3DA |train for ISP | |
| |DSLAM 6200 +-----------------------------------------+
| |platform |Upgrade recommended to 12.1(7)DA2 |
+---------------+----------------+-----------------------------------------+
| |Early deployment| |
| |train for |End of Engineering |
| |ISP/Telco/PTT | |
| 11.3DB |xDSL broadband +-----------------------------------------+
| |concentrator | |
| |platform, (NRP) |Upgrade recommended to 12.1(5)DB2 |
| |for 6400 | |
+---------------+----------------+-----------------------------------------+
| |Short-lived ED |End of Engineering |
| 11.3HA |release for ISR | |
| |3300 (SONET/SDH +-----------------------------------------+
| |router) |Upgrade recommended to 12.0(18) |
+---------------+----------------+-----------------------------------------+
| |MC3810 |End of Engineering |
| 11.3MA |functionality +-----------------------------------------+
| |only |Upgrade recommended to 12.1(9) |
+---------------+----------------+-----------------------------------------+
| |Voice over IP, | |
| |media |End of Engineering |
| 11.3NA |convergence, +-----------------------------------------+
| |various |Upgrade recommended to 12.1(9) |
| |platforms | |
+---------------+----------------+-----------------------------------------+
| |Early deployment|End of Engineering |
| 11.3T |major release, | |
| |feature-rich for+-----------------------------------------+
| |early adopters |Upgrade recommended to 12.0(18) |
+---------------+----------------+-----------------------------------------+
| | |End of Engineering |
| 11.3XA |Introduction of +-----------------------------------------+
| |ubr7246 and 2600|Upgrade recommended to 12.0(18) |
+---------------+----------------+-----------------------------------------+
| | |End of Engineering |
| 11.3WA4 |LightStream 1010+-----------------------------------------+
| | |Upgrade recommended to 12.0W |
+---------------+----------------+-------------+------------+--------------+
| 12.0-based Releases | Rebuild | Interim** | Maintenance |
+---------------+----------------+-------------+------------+--------------+
| |General | | | |
| 12.0 |Deployment | | |12.0(18) |
| |release for all | | | |
| |platforms | | | |
+---------------+----------------+-------------+------------+--------------+
| | |Not Scheduled |
| 12.0DA |xDSL support +-----------------------------------------+
| |6100, 6200 |Upgrade recommended to 12.1(7)DA2 |
+---------------+----------------+-----------------------------------------+
| |Early Deployment| |
| |(ED) release, | |
| |which delivers |Not Scheduled |
| |support for the | |
| 12.0DB |Cisco 6400 +-----------------------------------------+
| |Universal Access| |
| |Concentrator | |
| |(UAC) for Node |Upgrade recommended to 12.1(5)DB2 |
| |Switch Processor| |
| |(NSP). | |
+---------------+----------------+-----------------------------------------+
| |Early Deployment| |
| |(ED) release, | |
| |which delivers |Not Scheduled |
| |support for the | |
| 12.0DC |Cisco 6400 +-----------------------------------------+
| |Universal Access| |
| |Concentrator | |
| |(UAC) for Node |Upgrade recommended to 12.1DC |
| |Switch Processor| |
| |(NSP). | |
+---------------+----------------+-------------+------------+--------------+
| |Core/ISP | | |12.0(18)S |
| 12.0S |support GSR, | | |Available |
| |RSP, c7200 | | |2001-July |
+---------------+----------------+-------------+------------+--------------+
| 12.0SC |Cable/broadband | | |12.0(16)SC |
| |ISP ubr7200 | | | |
+---------------+----------------+-------------+------------+--------------+
| 12.0SL |10000 ESR c10k |Not affected |
+---------------+----------------+-------------+------------+--------------+
| |Cisco IOS | | |12.0(18)ST |
| |software | | |2001-Jul-02 |
| |Release12.0ST is| | | |
| |an early | | | |
| |deployment (ED) | | | |
| |release for the | | | |
| 12.0ST |Cisco 7200, | | | |
| |7500/7000RSP and| | | |
| |12000 (GSR) | | | |
| |series routers | | | |
| |for Service | | | |
| |Providers | | | |
| |(ISPs). | | | |
+---------------+----------------+-------------+------------+--------------+
| |Early | |
| |Deployment(ED) |Not Scheduled |
| 12.0T |VPN, Distributed| |
| |Director, +-----------------------------------------+
| |various |Upgrade recommended to 12.1(9) |
| |platforms | |
+---------------+----------------+-----------------------------------------+
| |Catalyst | |
| |switches | |
| |cat8510c, | |
|12.0(13)W5(19c)|cat8540c, c6msm,|Not vulnerable |
| |ls1010, | |
| |cat8510m, | |
| |cat8540m | |
+---------------+----------------+-------------+------------+--------------+
| |Catalyst | | | |
|12.0(10)W5(18g)|switches | | |12.0(18)W5(22a)
| |cat2948g, | | |2001-August-23|
| |cat4232 | | | |
+---------------+----------------+-------------+------------+--------------+
| |Catalyst | | | |
|12.0(14)W5(20) |switches | | |12.0(18)W5(22)|
| |cat5000ATM | | |2001-August-03|
+---------------+----------------+-------------+------------+--------------+
| 12.0WC | | |12.0(5.4)WC1| |
| | | |2001-July | |
+---------------+----------------+-----------------------------------------+
| | |Not Scheduled |
| 12.0WT |cat4840g +-----------------------------------------+
| | |Upgrade to be determined |
+---------------+----------------+-----------------------------------------+
| |Early Deployment|Not Scheduled |
| 12.0XA |(ED) limited +-----------------------------------------+
| |platforms |Upgrade recommended to 12.1(9) |
+---------------+----------------+-----------------------------------------+
| |Short-lived |Not Scheduled |
| 12.0XB |early deployment+-----------------------------------------+
| |release |Upgrade recommended to 12.1(9) |
+---------------+----------------+-----------------------------------------+
| |Early Deployment|Not Scheduled |
| 12.0XC |(ED) limited +-----------------------------------------+
| |platforms |Upgrade recommended to 12.1(9) |
+---------------+----------------+-----------------------------------------+
| |Early Deployment|Not Scheduled |
| 12.0XD |(ED) limited +-----------------------------------------+
| |platforms |Upgrade recommended to 12.1(9) |
+---------------+----------------+-----------------------------------------+
| |Early Deployment|Not Scheduled |
| 12.0XE |(ED) limited +-----------------------------------------+
| |platforms |Upgrade recommended to 12.1(8a)E |
+---------------+----------------+-----------------------------------------+
| |Early Deployment|Not Scheduled |
| 12.0XF |(ED) limited +-----------------------------------------+
| |platforms |Upgrade recommended to 12.1(9) |
+---------------+----------------+-----------------------------------------+
| |Early Deployment|Not Scheduled |
| 12.0XG |(ED) limited +-----------------------------------------+
| |platforms |Upgrade recommended to 12.1(9) |
+---------------+----------------+-----------------------------------------+
| |Early Deployment|Not Scheduled |
| 12.0XH |(ED) limited +-----------------------------------------+
| |platforms |Upgrade recommended to 12.1(9) |
+---------------+----------------+-----------------------------------------+
| |Early Deployment|Not Scheduled |
| 12.0XI |(ED) limited +-----------------------------------------+
| |platforms |Upgrade recommended to 12.1(9) |
+---------------+----------------+-----------------------------------------+
| |Early Deployment|Not Scheduled |
| 12.0XJ |(ED) limited +-----------------------------------------+
| |platforms |Upgrade recommended to 12.1(9) |
+---------------+----------------+-----------------------------------------+
| |Early Deployment|Not Scheduled |
| 12.0(5)XK |(ED) limited +-----------------------------------------+
| |platforms |Upgrade recommended to 12.1(9) |
+---------------+----------------+-----------------------------------------+
| |Early Deployment|Not Scheduled |
| 12.0(7)XK |(ED) limited +-----------------------------------------+
| |platforms |Upgrade recommended to 12.1(9) |
+---------------+----------------+-----------------------------------------+
| |Early Deployment|Not Scheduled |
| 12.0XL |(ED) limited +-----------------------------------------+
| |platforms |Upgrade recommended to 12.1(9) |
+---------------+----------------+-----------------------------------------+
| |Early Deployment|Not Scheduled |
| 12.0XM |(ED) limited +-----------------------------------------+
| |platforms |Upgrade recommended to 12.0(4)XM1 |
| | |Availability date to be determined |
+---------------+----------------+-----------------------------------------+
| |Early Deployment|Not Scheduled |
| 12.0XN |(ED) limited +-----------------------------------------+
| |platforms |Upgrade recommended to 12.1(9) |
+---------------+----------------+-----------------------------------------+
| |Early Deployment|Not Scheduled |
| 12.0XP |(ED) limited +-----------------------------------------+
| |platforms |Upgrade recommended to 12.0(5.4)WC1 |
+---------------+----------------+-----------------------------------------+
| |Early Deployment|Not Scheduled |
| 12.0XQ |(ED) limited +-----------------------------------------+
| |platforms |Upgrade recommended to 12.1(9) |
+---------------+----------------+-----------------------------------------+
| |Early Deployment|Not Scheduled |
| 12.0XR |(ED) limited +-----------------------------------------+
| |platforms |Upgrade recommended to 12.2(1b) |
+---------------+----------------+-----------------------------------------+
| |Early Deployment|End of Engineering |
| 12.0XS |(ED) limited +-----------------------------------------+
| |platforms |Upgrade recommended to 12.1(8a)E |
+---------------+----------------+-----------------------------------------+
| |Early Deployment|Not Scheduled |
| 12.0XU |(ED) limited +-----------------------------------------+
| |platforms |Upgrade recommended to 12.0(5.4)WC1 |
+---------------+----------------+-----------------------------------------+
| |Early Deployment|Not Scheduled |
| 12.0XV |(ED) limited +-----------------------------------------+
| |platforms |Upgrade recommended to 12.2(1b) |
| | |2001-Jul-02 |
+---------------+----------------+-------------+------------+--------------+
| 12.1-based Releases | Rebuild | Interim** | Maintenance |
+---------------+----------------+-------------+------------+--------------+
| |LD Release for | | | |
| 12.1 |all platforms | | |12.1(9) |
+---------------+----------------+-------------+------------+--------------+
| 12.1AA |Dial support | | |12.1(9)AA |
+---------------+----------------+-------------+------------+--------------+
| |Core/ISP | | | |
| 12.1CX |support GSR, | | | |
| |RSP, c7200 | | | |
+---------------+----------------+-------------+------------+--------------+
| 12.1DA |xDSL support |12.1(7)DA2 | | |
| |6100, 6200 |2001-Jun-18 | | |
+---------------+----------------+-------------+------------+--------------+
| |Cisco IOS | | | |
| |Software Release| | | |
| |12.1(1)DB | | | |
| 12.1DB |supports Cisco's| | | |
| |6400 Universal | | | |
| |Access | | | |
| |Concentrator | | | |
+---------------+----------------+-------------+------------+--------------+
| |Cisco IOS | | | |
| |Software Release| | | |
| |12.1(1)DC | | | |
| 12.1DC |supports Cisco's| | | |
| |6400 Universal | | | |
| |Access | | | |
| |Concentrator | | | |
+---------------+----------------+-------------+------------+--------------+
| |Core/ISP | | | |
| 12.1E |support GSR, | | |12.1(8a)E |
| |RSP, c7200 | | |2001-Jul-09 |
+---------------+----------------+-------------+------------+--------------+
| |12.1EC is being | | | |
| |offered to allow| | | |
| |early support of| | | |
| |new features on | | | |
| |the uBR7200 | | | |
| 12.1EC |platform, as | |12.1(6.5)EC3| |
| |well as future | | | |
| |support for new | | | |
| |Universal | | | |
| |Broadband Router| | | |
| |headend | | | |
| |platforms. | | | |
+---------------+----------------+-------------+------------+--------------+
| 12.1EX |Catalyst 6000 | | |12.1(8a)E |
| |support | | |2001-Jul-09 |
+---------------+----------------+-------------+------------+--------------+
| |Cat8510c, | | | |
| 12.1EY |Cat8510m, | | |12.1(6)EY |
| |Cat8540c, | | | |
| |Cat8540m, LS1010| | | |
+---------------+----------------+-------------+------------+--------------+
| |Early Deployment| | | |
| 12.1EZ |(ED) special |12.1(6)EZ1 | | |
| |image | | | |
+---------------+----------------+-------------+------------+--------------+
| |Early | |
| |Deployment(ED) |Not Scheduled |
| 12.1T |VPN, Distributed| |
| |Director, +-----------------------------------------+
| |various |Upgrade recommended to 12.2(1b) |
| |platforms | |
+---------------+----------------+-------------+------------+--------------+
| |Early Deployment|Not Schedlued |
| 12.1XA |(ED) limited +-----------------------------------------+
| |platforms |Upgrade recommended to 12.2(1b) |
+---------------+----------------+-------------+------------+--------------+
| |Early Deployment| | | |
| 12.1XB |(ED) limited | | | |
| |platforms | | | |
+---------------+----------------+-------------+------------+--------------+
| |Early Deployment| | | |
| 12.1XC |(ED) limited | | |12.1(9)AA |
| |platforms | | | |
+---------------+----------------+-------------+------------+--------------+
| |Early Deployment|Not Scheduled |
| 12.1XD |(ED) limited +-----------------------------------------+
| |platforms |Upgrade recommended to 12.2(1b) |
+---------------+----------------+-------------+------------+--------------+
| |Early Deployment| | | |
| 12.1XE |(ED) limited | | | |
| |platforms | | | |
+---------------+----------------+-------------+------------+--------------+
| |Early Deployment| | | |
| 12.1XF |(ED) 811 and |12.1(2)XF4 | | |
| |813 (c800 |2001-July-09 | | |
| |images) | | | |
+---------------+----------------+-------------+------------+--------------+
| |Early Deployment| | | |
| 12.1XG |(ED) 800, 805, |12.1(5)XG5 | | |
| |820, and 1600 |2001-July-09 | | |
+---------------+----------------+-------------+------------+--------------+
| |Early Deployment|Not Scheduled |
| 12.1XH |(ED) limited +-----------------------------------------+
| |platforms |Upgrade recommended to 12.2(1b) |
+---------------+----------------+-----------------------------------------+
| |Early Deployment|Not Scheduled |
| 12.1XI |(ED) limited +-----------------------------------------+
| |platforms |Upgrade recommended to 12.2(1b) |
+---------------+----------------+-----------------------------------------+
| |Early Deployment|Not Scheduled |
| 12.1XJ |(ED) limited +-----------------------------------------+
| |platforms |Upgrade recommended to 12.1(5)YB4 |
+---------------+----------------+-------------+------------+--------------+
| |Early Deployment| | | |
| 12.1XK |(ED) limited | | | |
| |platforms | | | |
+---------------+----------------+-------------+------------+--------------+
| |Early Deployment|Not Scheduled |
| 12.1XL |(ED) limited +-----------------------------------------+
| |platforms |Upgrade recommended to 12.2(1b) |
+---------------+----------------+-------------+------------+--------------+
| |Short-lived | | | |
| 12.1XM |early deployment|12.1(4)XM4 | | |
| |release |2001-June-27 | | |
+---------------+----------------+-------------+------------+--------------+
| |Early Deployment| | | |
| 12.1XP |(ED) 1700 and |12.1(3)XP4 | | |
| |SOHO | | | |
+---------------+----------------+-------------+------------+--------------+
| |Short-lived |Not Scheduled |
| 12.1XQ |early deployment+-----------------------------------------+
| |release |Upgrade recommended to 12.2(1b) |
+---------------+----------------+-------------+------------+--------------+
| |Short-lived | | | |
| 12.1XR |early deployment|12.1(5)XR2 | | |
| |release | | | |
+---------------+----------------+-------------+------------+--------------+
| |Short-lived |12.1(5)XR2 | | |
| 12.1XS |early deployment|2001-July | | |
| |release | | | |
+---------------+----------------+-------------+------------+--------------+
| |Early Deployment| | | |
| 12.1XT |(ED) 1700 |12.1(3)XT3 | | |
| |series | | | |
+---------------+----------------+-------------+------------+--------------+
| |Early Deployment| | | |
| 12.1XU |(ED) limited |12.1(5)XU1 | | |
| |platforms | | | |
+---------------+----------------+-------------+------------+--------------+
| |Short-lived | | | |
| 12.1XV |early deployment|12.1(5)XV3 | | |
| |release |2001-July | | |
+---------------+----------------+-------------+------------+--------------+
| |Short-lived |Not Scheduled |
| 12.1XW |early deployment+-----------------------------------------+
| |release |Upgrade recommended to 12.2DD |
+---------------+----------------+-------------+------------+--------------+
| |Short-lived | | | |
| 12.1XX |early deployment| | |12.1(6)EZ |
| |release | | | |
+---------------+----------------+-------------+------------+--------------+
| |Short-lived | | | |
| 12.1XY |early deployment|12.1(5)XY6 | | |
| |release |2001-July | | |
+---------------+----------------+-------------+------------+--------------+
| |Short-lived | | | |
| 12.1XZ |early deployment|12.1(5)XZ4 | | |
| |release |2001-July | | |
+---------------+----------------+-------------+------------+--------------+
| |Short-lived |Not Scheduled |
| 12.1YA |early deployment+-----------------------------------------+
| |release |Upgrade recommended to 12.2(2)XB |
| | |2001-August |
+---------------+----------------+-------------+------------+--------------+
| |Short-lived | | | |
| 12.1YB |early deployment|12.1(5)YB4 | | |
| |release | | | |
+---------------+----------------+-------------+------------+--------------+
| |Short-lived | | | |
| 12.1YC |early deployment|12.1(5)YC1 | | |
| |release | | | |
+---------------+----------------+-------------+------------+--------------+
| |Short-lived | | | |
| 12.1YD |early deployment|12.1(5)YD2 | | |
| |release |2001-June-25 | | |
+---------------+----------------+-------------+------------+--------------+
| |Short-lived | | | |
| 12.1YF |early deployment|12.1(5)YF2 | | |
| |release | | | |
+---------------+----------------+-------------+------------+--------------+
| 12.2-based Releases | Rebuild | Interim** | Maintenance |
+---------------+----------------+-------------+------------+--------------+
| 12.2 |LD release for |12.2(1b) |12.2(1.1) |12.2(3) |
| |all platforms | | |2001-August |
+---------------+----------------+-------------+------------+--------------+
| |General | | | |
| 12.2T |deployment | |12.2(2.2)T | |
| |release for all | | | |
| |platforms | | | |
+---------------+----------------+-------------+------------+--------------+
| 12.2XA |SPLOB | | |12.2(2)XA |
| | | | |2001-July-02 |
+---------------+----------------+-------------+------------+--------------+
| |Short-lived | | | |
| 12.2XD |early deployment|12.2(1)XD1 | | |
| |release | | | |
+---------------+----------------+-------------+------------+--------------+
| |Short-lived | | | |
| 12.2XE |early deployment| | |12.2(1)XE |
| |release | | | |
+---------------+----------------+-------------+------------+--------------+
| |Short-lived | | | |
| 12.2XH |early deployment| | |12.2(1)XH |
| |release | | |2001-June-25 |
+---------------+----------------+-------------+------------+--------------+
| |Short-lived | | | |
| 12.2XQ |early deployment| | |12.2(1)XQ |
| |release | | |2001-June-23 |
+---------------+----------------+-------------+------------+--------------+
| Notes |
+--------------------------------------------------------------------------+
| * All dates are estimated and subject to change. |
| |
| ** Interim releases are subjected to less rigorous testing than regular |
| maintenance releases, and may have serious bugs. |
+--------------------------------------------------------------------------+
Obtaining Fixed Software
Cisco is offering free software upgrades to eliminate this vulnerability for all
affected customers.
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 Web site at
http://www.cisco.com. Please do not contact either "psirt@cisco.com" or
"security-alert@cisco.com" for software upgrades.
Workarounds
The workaround for this vulnerability is to disable HTTP server on the router or
to use TACACS+ or Radius for authentication.
To disable HTTP server, use the following commands:
Router# configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)# no ip http server
In order to configure TACACS+ or Radius for authentication, please consult the
following link http://www.cisco.com/warp/public/480/tacplus.shtml
Exploitation and Public Announcements
This vulnerability has been reported to us independently by David Hyams, Ernst &
Young, Switzerland and by Bashis (bash@ns.wcd.se).
The Cisco PSIRT has received no reports of malicious exploitation of this
vulnerability and we are not aware of any public discussion.
Status of This Notice: INTERIM
This is an interim security advisory. Cisco anticipates issuing updated versions
of this notice at irregular intervals as there are material changes in the
facts, and will continue to update this notice as necessary. The reader is
warned that this notice may contain inaccurate or incomplete information.
Although Cisco cannot guarantee the accuracy of all statements in this notice,
all of the facts have been checked to the best of our ability. Cisco anticipates
issuing monthly updates of this notice until it reaches FINAL status.
A standalone 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 notice will be posted on Cisco's Worldwide Web site at
http://www.cisco.com/warp/public/707/IOS-httplevel-pub.html. In addition to
Worldwide Web posting, a text version of this notice is clear-signed with the
Cisco PSIRT PGP key and is posted to the following e-mail and Usenet news
recipients:
*) cust-security-announce@cisco.com
*) bugtraq@securityfocus.com
*) first-teams@first.org (includes CERT/CC)
*) cisco@spot.colorado.edu
*) comp.dcom.sys.cisco
*) firewalls@lists.gnac.com
*) Various internal Cisco mailing lists
Future updates of this notice, if any, will be placed on Cisco's Worldwide Web
server, but may or may not be actively announced on mailing lists or newsgroups.
Users concerned about this problem are encouraged to check the URL given above
for any updates.
Revision History
Revision 1.02001-June-27 08:00 UTC -0800 Initial public release
Revision 1.12001-June-28 08:00 UTC -0800 Updated software availability
dates
Revision 1.22001-June-29 Updated platform descriptions
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 Web site at
http://www.cisco.com/warp/public/707/sec_incident_response.shtml. This includes
instructions for press inquiries regarding Cisco security notices.
This notice is Copyright 2001 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.
All contents are Copyright © 1992--2001 Cisco Systems Inc. All rights reserved.
Important Notices and Privacy Statement.
[End Cisco Systems Inc. Advisory]
_______________________________________________________________________________
CIAC wishes to acknowledge the contributions of Cisco Systems Inc. for the
information contained in this bulletin.
_______________________________________________________________________________
CIAC, the Computer Incident Advisory Center, is the computer
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(DOE) and the emergency backup response team for the National
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CIAC services are available to DOE, DOE contractors, and the NIH. CIAC
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E-mail: ciac@ciac.org
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PLEASE NOTE: Many users outside of the DOE, ESnet, and NIH computing
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