Under certain versions of the Cisco Catalyst a user who already has access to the device can elevate their current access to 'enable' mode without a password. Once 'enable' mode is obtained the user can access the configuration mode and commit unauthorized configuration changes on a Catalyst switch.
Cisco Catalyst software permits unauthorized access to the enable mode in the 5.4(1) release. Once initial access is granted, access can be obtained for the higher level "enable" mode without a password. This problem is resolved in version 5.4(2). Customers with vulnerable releases are urged to upgrade as soon as possible.
Cisco Customers with contracts should obtain upgraded software through their regular update channels. For most customers, this means that upgrades should be obtained via the Software Center on Cisco's Worldwide Web site at http://www.cisco.com. Cisco 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: firstname.lastname@example.org