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Date: Wed, 15 Apr 2015 12:55:53 -0700
From: Tavis Ormandy <taviso@...gle.com>
To: Tyler Hicks <tyhicks@...onical.com>
Cc: oss-security@...ts.openwall.com, 
	Assign a CVE Identifier <cve-assign@...re.org>, security <security@...ntu.com>, 
	St├ęphane Graber <stgraber@...ntu.com>
Subject: Re: Re: Problems in automatic crash analysis frameworks

On Wed, Apr 15, 2015 at 11:48 AM, Tavis Ormandy <taviso@...gle.com> wrote:
> FWIW, I verified this is exploitable.
>

Here's the script I used to verify, it should create the file
/etc/rootfiletest. By using the partial trick or creating parse
errors, this is easy to turn into a root shell.

Note: I'm a c programmer, I don't know python at all, it's probably
the worlds worst python code - I used python because I was reading the
python3-lxc code.

taviso@...ntu:~/tmp$ ls -l /etc/rootfiletest
ls: cannot access /etc/rootfiletest: No such file or directory
taviso@...ntu:~/tmp$ rm -rf /tmp/?0* /tmp/exploit/
taviso@...ntu:~/tmp$ python3 test.py
taviso@...ntu:~/tmp$ ls -l /etc/rootfiletest
-rw-rw---- 1 root root 0 Apr 15 12:53 /etc/rootfiletest

Tavis.

View attachment "exploit.py" of type "text/x-python" (811 bytes)

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