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.
Affected products
- Cisco / 3660_router
- Cisco / 7100_router
- Cisco / 7200_router
- Cisco / 7500_router
- Cisco / accesspathls-3 – ls-3
- Cisco / accesspathts-3 – ts-3
- Cisco / accesspathvs-3 – vs-3
- Cisco / as5200
- Cisco / as5300
- Cisco / as5800
- Cisco / IOS12.0(5) – 12.0(5)
- Cisco / IOS12.0(6) – 12.0(6)
- Cisco / IOS12.0(7)t – 12.0(7)t
- Cisco / IOS11.3aa – 11.3aa
- Cisco / IOS12.0(2) – 12.0(2)
- Cisco / IOS12.0(2)xc – 12.0(2)xc
- Cisco / IOS12.0(2)xd – 12.0(2)xd
- Cisco / IOS12.0(2)xf – 12.0(2)xf
- Cisco / IOS12.0(2)xg – 12.0(2)xg
- Cisco / IOS12.0(3)t2 – 12.0(3)t2
- Cisco / IOS12.0(4) – 12.0(4)
- Cisco / IOS12.0(4)s – 12.0(4)s
- Cisco / IOS12.0(4)t – 12.0(4)t
- Cisco / system_controller_3640
- Cisco / ubr7200
- Cisco / voice_gateway_as5800