Date: Fri, 17 Jun 2016 11:22:32 +0200 From: Cedric Buissart <cbuissar@...hat.com> To: oss-security@...ts.openwall.com 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 <tim-security@...tinelchicken.org> wrote: > > Here are the additional details I promised: > > http://blog.blindspotsecurity.com/2016/06/advisory-http-header-injection-in.html > > 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://127.0.0.1%0d%0aX-injected:%20header%0d%0ax-leftover:%20:12345/foo > 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: https://sourceware.org/bugzilla/show_bug.cgi?id=20018 > > Best regards, > tim > -- Cedric Buissart, Product Security Purkynova 111 Brno 612 45 Czech Republic
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