-----BEGIN PGP SIGNED MESSAGE----- Cisco Security Advisory: Vulnerabilities in Cisco SN 5420 Storage Routers Revision 1.0 For Public Release 2001 July 11 08:00 (UTC -0800) _________________________________________________________________ Summary Two vulnerabilities have been discovered in Cisco SN 5420 Storage Router software release up to and including 1.1(3). One of the vulnerabilities can cause Denial-of-Service attack. The other allows unrestricted low level access to the SN 5420. There is no workaround for these vulnerabilities. It is possible to mitigate them by blocking access to ports 513 and 8023 on the network edge. The vulnerabilities are documented in Cisco Bug IDs CSCdu27529 and CSCdu27514. No other Cisco product is affected by these vulnerabilities. This advisory is available at http://www.cisco.com/warp/public/707/SN-kernel-pub.html Affected Products Cisco SN 5420 Storage Routers running software release up to and including 1.1(3) are affected by the vulnerabilities. To determine your software release, type "show system" at the command prompt. No other Cisco products are affected by these vulnerabilities. Details CSCdu27529 You can reboot the device by rapidly establishing multiple connections to TCP port 8023. CSCdu27514 When logging into SN 5420 using "rlogin" or when connecting to the port 8023 from the GigabitEthernet or management interface, a user can access a developer's' shell of the SN 5420. The user is not asked for a password. No other authorization is performed. This shell is used during developing for testing. Starting with software releases 1.1(4), this capability is removed from the software. Impact By repeatedly exploiting CSCdu27529, it is possible to prevent a user from accessing storage, thus causing Denial-of-Service attack. When logged into a developer's shell (CSCdu27514), users can execute debug commands, start and stop processes, and interfere with the normal process execution. Users who are logged in such a manner and all commands executed by them are not logged or shown using the standard logging mechanism of the Cisco SN 5420 Storage Router. Software Versions and Fixes The vulnerabilities are fixed in the release 1.1(4) of the software, which is availabe on CCO. 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. 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 the upgrade, which should be free of charge. Customers without contracts should get their upgrades by contacting the Cisco Technical Assistance Center (TAC). 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: tac@cisco.com Give the URL of this notice as evidence of your entitlement to a free upgrade. Free upgrades for non-contract customers must be requested through the TAC. Please do not contact either "psirt@cisco.com" or "security-alert@cisco.com" for software upgrades. Workarounds There is no workaround for these vulnerabilities. It is possible to mitigate them by blocking access to ports 513 and 8023 on the network edge. 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 found internally during product installation. Status of This Notice: FINAL This is a final notice. 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 does not anticipate issuing updated versions of this notice unless there is some material change in the facts. Should there be a significant change in the facts, Cisco may update this notice. Distribution This notice will be posted on Cisco's Worldwide Web site at http://www.cisco.com/warp/public/707/SN-kernel-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 1.0 2001-July-11 08:00 UTC -0800 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 Web site at http://www.cisco.com/warp/public/707/sec_incident_response.shtml. This includes instructions for press inquiries regarding Cisco security notices. The rest of the Cisco Security Advisories are available at http://www.cisco.com/go/psirt _________________________________________________________________ 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. _________________________________________________________________ -----BEGIN PGP SIGNATURE----- Version: 2.6.2 iQEVAwUBO0wGSGiN3BRdFxkbAQFvwQf/S1BiSSB7bQD1FcE6RDeSnw72gWwGBu73 x6IFhG+qrnl5EaYcQREDUz0BpF/Ln0yoQeeggEOO/bKKqng8ee5C7j+CW7rSAn3a Q2yeXApD/GCLVnuQFkgoKUBWZaRe0K5uTsIBh+73GaPqmfao4Q8gzcqe/bbwd+Dd QvTqLldLj4QH4MSuLr5H4dQzSQf6rBa4WZf3koiyyBgl01UtqArCDddkiRsgug8K O7APHJYTOLWTau9MbNcGF2dwXlEwXZQ48yWFahl7gWqfOlw6qZL2uSjYVh/Ny8gf tcHKPxLhFz3FEunNI9ks9iMDuGmoM1GACih0Qe5ujPw1miGTEKg0xw== =a+ji -----END PGP SIGNATURE-----