full-disclosure - Re: GNU tar directory traversal

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Message-ID: <45643007.6040906@iki.fi>
Date: Wed, 22 Nov 2006 13:09:59 +0200
From: Teemu Salmela <teemu.salmela@....fi>
To: full-disclosure@...ts.grok.org.uk
Subject: Re: GNU tar directory traversal

Siim Põder wrote:
> And is tar supposed to overwrite arbitrary files on the filesystem when
> untaring an archieve?
>
> If I understand Teemu right, then he's found a way to create a tar file
> that would create a symlink when untared; and create further files to
> wherever the symlink points to (If this is not the case, then
> LOLOLOLOLOLOL might be in order).
>
> So, for example, I make a tar archieve that contains a symlink to
> 'bla'->'/etc' and 'bla/passwd', that - if opened by root - would
> overwrite the passwd file.
>   
Yes, this is how it works.

-- 
fscanf(socket,"%s",buf); printf(buf);
sprintf(query, "SELECT %s FROM table", buf);
sprintf(cmd, "echo %s | sqlquery", query); system(cmd);
Teemu Salmela 


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