Rlogin -froot command could allow remote root access
| rlogin-froot (104) |  High Risk |
Description:
A vulnerability in the rlogin daemon of some AIX and Linux systems could allow a remote attacker to gain unauthorized root access to the system. A remote attacker can specify the -froot option to rlogin to cause the server daemon to immediately drop the user into a root shell. This allows the attacker to log in as root without being prompted for a password.
Platforms Affected:
- Compaq, Tru64
- Data General, DG/UX
- HP, HP-UX
- IBM, AIX
- Linux, Kernel
- SCO, SCO Unix
- SGI, IRIX
- Sun, Solaris
- WindRiver, BSDOS
Remedy:
For IBM AIX 3:
Apply APAR IX44254 patch, as listed in CERT Advisory CA-1994-09. See References.
As a workaround, disable rlogin in the /etc/inetd.conf file and restart the inetd process.
Consequences:
Gain Access
References:
- BugTraq Mailing List, Sat, 30 Jul 1994 07:52:22 -0400, Re: -froot??? (AIX rlogin bug) at http://archives.neohapsis.com/archives/bugtraq/1994_3/0100.html.
- CERT Advisory CA-1994-09, /bin/login Vulnerability at http://www.cert.org/advisories/CA-1994-09.html.
- BID-458: AIX login(1) Vulnerability
- CVE-1999-0113: Some implementations of rlogin allow root access if given a -froot parameter.
Reported:
May 01, 1994
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