[Python-Dev] Status of XML fixes

Eli Bendersky eliben at gmail.com
Sun Mar 17 21:03:21 CET 2013

On Sun, Mar 17, 2013 at 12:00 PM, Stefan Behnel <stefan_ml at behnel.de> wrote:

> Eli Bendersky, 17.03.2013 19:25:
> > IMHO Benjamin is right, given that this attack has been known to exist
> > since 2003. Moreover, as it appears that no changes whatsoever are going
> to
> > make it into 2.7, I don't see why patching of 3.1, 3.2 and 3.3 is needed.
> > As for 3.4, it can't hurt to add an opt-in option for a safe mode to the
> > affected libraries.
> Why keep the libraries vulnerable for another year (3.4 final is expected
> for early 2014), if there is something we can do about them now? The fact
> that the attacks have been known for a decade doesn't mean an attacker will
> need another ten years to exploit them.

 I'm using a conditional argument here. *If* we don't deem the changes
important enough to go into 2.7, *then* they aren't important enough to go
into 3.1 and 3.2; 3.3 is a question. That's because 2.7 is arguably more
important in this respect, having no direct upgrade path, whereas for 3.x
users the fix will be available with 3.4 anyway.

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