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Date: Fri, 17 Jun 2016 11:22:32 +0200
From: Cedric Buissart <>
Subject: Re: CVE request: Python HTTP header injection in urrlib2/urllib/httplib/http.client

Hi Tim,

On Wed, Jun 15, 2016 at 6:54 PM, Tim <>

> Here are the additional details I promised:
> The gist of it is that protocol injection can occur not only if an
> application sets a header based on user-supplied values, but also if
> the application ever tries to fetch a URL specified by an attacker
> (SSRF case) OR if the application ever accesses any malicious web
> server (redirection case).  URLs of the following form allow
> injection into the HTTP stream:
>   http://localhost%00%0d%0ax-bar:%20:12345/foo
> More details in the blog post, of course.

Thanks for details!
The glibc side of the issue has its own upstream bug entry:

> Best regards,
> tim

Cedric Buissart,
Product Security

Purkynova 111
Brno 612 45
Czech Republic

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