Rsh NULL login could grant unauthorized access

rsh-null (112) The risk level is classified as HighHigh Risk

Description:

Older versions of the in.rshd daemon allow users to log in as the NULL user that, because of a vulnerability in the rusersok function call, would grant access without proper authorization.

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:

Disable the RSH service by commenting it out of the inetd.conf file and restarting the inetd process. If your configuration requires the use of RSH facilities, you should contact your vendor for patch information or install a RSH from a third party package.

Consequences:

Gain Access

References:

  • CVE-1999-0180: in.rshd allows users to login with a NULL username and execute commands.

Reported:

Not available

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