Vulnerability CVE-2000-0268
Published: 2000-04-20   Modified: 2012-02-12

Description:
Cisco IOS 11.x and 12.x allows remote attackers to cause a denial of service by sending the ENVIRON option to the Telnet daemon before it is ready to accept it, which causes the system to reboot.

CVSS2 => (AV:N/AC:L/Au:N/C:N/I:N/A:P)

CVSS Base Score
Impact Subscore
Exploitability Subscore
5/10
2.9/10
10/10
Exploit range
Attack complexity
Authentication
Remote
Low
No required
Confidentiality impact
Integrity impact
Availability impact
None
None
Partial
Affected software
Cisco -> Accesspath 
Cisco -> As5200 
Cisco -> As5300 
Cisco -> As5800 
Cisco -> System controller 3640 
Cisco -> 3660 router 
Cisco -> 7100 router 
Cisco -> 7200 router 
Cisco -> 7500 router 
Cisco -> Ubr7200 
Cisco -> Voice gateway as5800 
Cisco -> IOS 

 References:
http://www.cisco.com/warp/public/707/iostelnetopt-pub.shtml
http://www.securityfocus.com/bid/1123
http://www.osvdb.org/1289
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