ID

VAR-200602-0025

CVE

CVE-2006-0486

TITLE

Cisco IOS of AAA Vulnerability to execute arbitrary commands in command authorization function

DESCRIPTION

Certain Cisco IOS releases in 12.2S based trains with maintenance release number 25 and later, 12.3T based trains, and 12.4 based trains reuse a Tcl Shell process across login sessions of different local users on the same terminal if the first user does not use tclquit before exiting, which may cause subsequent local users to execute unintended commands or bypass AAA command authorization checks, aka Bug ID CSCef77770. ------------ This vulnerability information is a summary of multiple vulnerabilities released at the same time. Please note that the contents of vulnerability information other than the title are included. ------------ AAA (authentication, authorization, and accounting) Authentication, authorization, and billing management for network usage ( Access management ) It is a mechanism for doing. Cisco IOS Then AAA It is possible to determine the privilege level of the authenticated user by using and to set authorization for specific commands for each level. Cisco IOS Implemented in AAA The command authorization function includes Tcl Shell mode (tclsh) There is a problem that authorization check is not properly executed for the command executed by. Tcl Shell mode is supported AAA Use the command authorization function IOS A device may be able to execute arbitrary commands with elevated privileges if exploited by a local attacker.Please refer to the “Overview” for the impact of this vulnerability. Cisco IOS is prone to a remote AAA command authorization-bypass vulnerability. This issue allows remote attackers to bypass AAA command authorization checks and to gain elevated access to affected devices. This issue is documented by Cisco bug ID CSCeh73049http://www.cisco.com/pcgi-bin/Support/Bugtool/onebug.pl?bugid=CSCeh73049. TITLE: Cisco IOS AAA Command Authentication Bypass Vulnerability SECUNIA ADVISORY ID: SA18613 VERIFY ADVISORY: http://secunia.com/advisories/18613/ CRITICAL: Less critical IMPACT: Security Bypass WHERE: Local system OPERATING SYSTEM: Cisco IOS R12.x http://secunia.com/product/50/ Cisco IOS 12.x http://secunia.com/product/182/ DESCRIPTION: A vulnerability has been reported in Cisco IOS, which can be exploited by malicious, local users to bypass certain security restrictions. Note: It has also been reported that an authenticated user is automatically placed into the Tcl Shell mode if a previous user goes into Tcl Shell mode and terminates the session before leaving the Tcl Shell mode. This may help to exacerbate the vulnerability. SOLUTION: Fixes are available (see patch matrix in vendor advisory). http://www.cisco.com/warp/public/707/cisco-response-20060125-aaatcl.shtml PROVIDED AND/OR DISCOVERED BY: The vendor credits Nicolas Fischbach of COLT Telecom. ORIGINAL ADVISORY: http://www.cisco.com/warp/public/707/cisco-response-20060125-aaatcl.shtml ---------------------------------------------------------------------- About: This Advisory was delivered by Secunia as a free service to help everybody keeping their systems up to date against the latest vulnerabilities. Subscribe: http://secunia.com/secunia_security_advisories/ Definitions: (Criticality, Where etc.) http://secunia.com/about_secunia_advisories/ Please Note: Secunia recommends that you verify all advisories you receive by clicking the link. Secunia NEVER sends attached files with advisories. Secunia does not advise people to install third party patches, only use those supplied by the vendor. ---------------------------------------------------------------------- Unsubscribe: Secunia Security Advisories http://secunia.com/sec_adv_unsubscribe/?email=packet%40packetstormsecurity.org ----------------------------------------------------------------------

AFFECTED PRODUCTS

CVSS

PROBLEMTYPE DATA

THREAT TYPE

local

TYPE

unknown

CONFIGURATIONS

PATCH

EXTERNAL IDS

REFERENCES

CREDITS

Nicolas Fischbach, Senior Manager, Network Engineering Security of COLT Telecom reported this issue to the vendor.

SOURCES

LAST UPDATE DATE

2024-08-14T14:00:25.963000+00:00

SOURCES UPDATE DATE

SOURCES RELEASE DATE