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Date: Thu, 11 Sep 2014 20:31:39 -0400 (EDT)
From: cve-assign@...re.org
To: kseifried@...hat.com
Cc: cve-assign@...re.org, oss-security@...ts.openwall.com
Subject: Re: vos tmp vuln
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> vos-1.10.4/vos/md5_cache.py
> def __init__(self, cache_db="/tmp/#vos_cached.db#"):
Nothing in your message shows that the MD5_Cache class is ever used
with that /tmp pathname. Also, your message doesn't show whether or
not the ultimate open call for that pathname uses O_EXCL|O_CREAT. The
following might possibly be relevant to this missing information:
- the "md5Cache = md5_cache.MD5_Cache()" line in scripts/vsync
- https://github.com/python/cpython/blob/master/Modules/_sqlite/connection.c
Those two items may be enough to show that a symlink attack can occur,
but we'll let you fill in the details.
For CVE assignments, it's not enough to show that the code contains a
/tmp pathname that is apparently used for write access. In a typical
case, it's also necessary to show that the piece of code is actually
executed during use of the product, the /tmp pathname is actually
used, and the specific open operation is unsafe in the presence of a
symlink. All of this can be straightforward for a self-contained sh or
possibly Perl script, but is often much less straightforward for
Python.
- --
CVE assignment team, MITRE CVE Numbering Authority
M/S M300
202 Burlington Road, Bedford, MA 01730 USA
[ PGP key available through http://cve.mitre.org/cve/request_id.html ]
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