Title: 3com Switches Backdoor Vulnerability
Severity: CRITICAL
Description:
Current (and possibly previous) versions of 3Com's switching software for LanPlex/Corebuilder switches contains an undocumented access level. In addition to the 'admin', 'read', and 'write' accounts, there is also a 'debug' account with a password of 'synnet' on shipped images (including those available for download from infodeli.3com.com).
The versions of firmware this was tested under include 7.0.1 and 8.1.1.
The 'debug' account has all the privileges of the 'admin' account, plus some debugging commands not available to any other ID. Attackers could change all the other access passwords without knowing the old password. In addition, they can get to the underlying OS shell.
If you allow remote administration (telnet access), attackers can obtain full control of your switches.
Yes:
LanPlex/Corebuilder 2500s (SW 7.x and 8.x)
Corebuilder 3500 (ver 1.0.0)
3Com LANplex 2500 (rev 7.15) with Version 7.0.1-19 - Built 01/17/97 02:41:17 PM
LinkSwitch
No:
Superstack II
LinkSwitch
FMS-II Superstack Hub P/N 3c16630a
Affected Products:
- 3Com LanPlex/Corebuilder 2500 7.0.1
- 3Com LanPlex/Corebuilder 2500 8.1.1
References:
- 3Com: 3Com Home Page
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