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[Python-Dev] cpython (2.7): Issue 17538: Document XML vulnerabilties

Donald Stufft donald at stufft.io
Tue Mar 26 19:57:37 CET 2013 
On Mar 26, 2013, at 2:41 PM, Antoine Pitrou <solipsis at pitrou.net> wrote:

> On Tue, 26 Mar 2013 17:53:39 +0100 (CET)
> christian.heimes <python-checkins at python.org> wrote:
>> +
>> +The XML processing modules are not secure against maliciously constructed data.
>> +An attacker can abuse vulnerabilities for e.g. denial of service attacks, to
>> +access local files, to generate network connections to other machines, or
>> +to or circumvent firewalls.
> 
> Really? Where does the "access local files, generate network
> connections, circumvent firewalls" allegation come from?

https://pypi.python.org/pypi/defusedxml#external-entity-expansion-remote

https://pypi.python.org/pypi/defusedxml#external-entity-expansion-local-file

https://pypi.python.org/pypi/defusedxml#dtd-retrieval

> 
> Regards
> 
> Antoine.
> 
> 
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-----------------
Donald Stufft
PGP: 0x6E3CBCE93372DCFA // 7C6B 7C5D 5E2B 6356 A926 F04F 6E3C BCE9 3372 DCFA

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