full-disclosure - Re: usb_modeswitch/pppd -detach

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Message-ID: <115464.1327200547@turing-police.cc.vt.edu>
Date: Sat, 21 Jan 2012 21:49:07 -0500
From: Valdis.Kletnieks@...edu
To: srm <srm@...kless.org>
Cc: full-disclosure@...ts.grok.org.uk
Subject: Re: usb_modeswitch/pppd -detach

On Sat, 21 Jan 2012 23:14:27 +0100, srm said:

> A possible quick fix could be to append $$:
> 66:             echo "symlink-name: $2" >/tmp/debug.$$

Note that $$ is semi-predictable, so it's still easily exploitable (look at your
own process ID, make symlinks for the next 100 or so values of $$, and then
launch the exploit as before.

'man 1 mktemp' for a better solution for shell files.

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