Title: Cisco IOS HTTP Configuration Arbitrary Administrative Access Vulnerability
Severity: CRITICAL
Description:
IOS is router firmware developed and distributed by Cisco Systems. IOS functions on numerous Cisco devices, including routers and switches.
A problem with the Cisco firmware makes it possible for a remote user to gain elevated privileges. This vulnerability can be exploited by attackers to gain full administrative access on the affect device, allowing a remote user to reconfigure devices using the affected firmware.
The problem is in the ability of a user to access the HTTP configuration menu of a Cisco device. A remote user accessing:
http://router.address/level/$NUMBER/exec/....
(where $NUMBER is a number in the range of 16 to 99) bypasses all authentication checking. This leads to a remote user gaining a privilege level of 15, which in IOS software is full administrative access (also known as enable).
With administrative access, remote attackers may be able to further compromise the network. They may be able to, for example: divert/redirect traffic, possibly monitor traffic, and/or cause a denial of service.
Affected Products:
- Cisco IOS 11.3
- Cisco IOS 11.3AA
- Cisco IOS 11.3DA
- Cisco IOS 11.3DB
- Cisco IOS 11.3HA
- Cisco IOS 11.3MA
- Cisco IOS 11.3NA
- Cisco IOS 11.3T
- Cisco IOS 11.3XA
- Cisco IOS 12.0
- Cisco IOS 12.0(10)W5(18g)
- Cisco IOS 12.0(14)W5(20)
- Cisco IOS 12.0(5)XK
- Cisco IOS 12.0(7)XK
- Cisco IOS 12.0DA
- Cisco IOS 12.0DB
- Cisco IOS 12.0DC
- Cisco IOS 12.0S
- Cisco IOS 12.0SC
- Cisco IOS 12.0SL
- Cisco IOS 12.0ST
- Cisco IOS 12.0T
- Cisco IOS 12.0WC
- Cisco IOS 12.0WT
- Cisco IOS 12.0XA
- Cisco IOS 12.0XB
- Cisco IOS 12.0XC
- Cisco IOS 12.0XD
- Cisco IOS 12.0XE
- Cisco IOS 12.0XF
- Cisco IOS 12.0XG
- Cisco IOS 12.0XH
- Cisco IOS 12.0XI
- Cisco IOS 12.0XJ
- Cisco IOS 12.0XL
- Cisco IOS 12.0XM
- Cisco IOS 12.0XN
- Cisco IOS 12.0XP
- Cisco IOS 12.0XQ
- Cisco IOS 12.0XR
- Cisco IOS 12.0XS
- Cisco IOS 12.0XU
- Cisco IOS 12.0XV
- Cisco IOS 12.1
- Cisco IOS 12.1AA
- Cisco IOS 12.1CX
- Cisco IOS 12.1DA
- Cisco IOS 12.1DB
- Cisco IOS 12.1DC
- Cisco IOS 12.1E
- Cisco IOS 12.1EC
- Cisco IOS 12.1EX
- Cisco IOS 12.1EY
- Cisco IOS 12.1EZ
- Cisco IOS 12.1T
- Cisco IOS 12.1XA
- Cisco IOS 12.1XB
- Cisco IOS 12.1XC
- Cisco IOS 12.1XD
- Cisco IOS 12.1XE
- Cisco IOS 12.1XF
- Cisco IOS 12.1XG
- Cisco IOS 12.1XH
- Cisco IOS 12.1XI
- Cisco IOS 12.1XJ
- Cisco IOS 12.1XK
- Cisco IOS 12.1XL
- Cisco IOS 12.1XM
- Cisco IOS 12.1XP
- Cisco IOS 12.1XQ
- Cisco IOS 12.1XR
- Cisco IOS 12.1XS
- Cisco IOS 12.1XT
- Cisco IOS 12.1XU
- Cisco IOS 12.1XV
- Cisco IOS 12.1XW
- Cisco IOS 12.1XX
- Cisco IOS 12.1XY
- Cisco IOS 12.1XZ
- Cisco IOS 12.1YA
- Cisco IOS 12.1YB
- Cisco IOS 12.1YC
- Cisco IOS 12.1YD
- Cisco IOS 12.1YF
- Cisco IOS 12.2
- Cisco IOS 12.2T
- Cisco IOS 12.2XA
- Cisco IOS 12.2XD
- Cisco IOS 12.2XE
- Cisco IOS 12.2XH
- Cisco IOS 12.2XQ
References:
- Cisco: Cisco Security Advisory: IOS HTTP Authorization Vulnerability
- Cisco Systems: Cisco IOS Software
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