GnuTLS versions 2.9.7 and later breaks libsoup (epiphany)
ametzler at downhill.at.eu.org
Wed Jun 9 19:41:18 CEST 2010
On 2010-06-08 Nikos Mavrogiannopoulos <nmav at gnutls.org> wrote:
> Andreas Metzler wrote:
> > Hello,
> > this is http://bugs.debian.org/576339
> > With GnuTLS versions 2.9.7 and later epiphany is unable to load https
> > sites. Reproducing this is very easy on Debian/unstable
> > (+experimental)
> > sudo apt-get install epiphany-browser
> > sudo apt-get install libgnutls26=2.9.11-1
> > epiphany-browser https://db.debian.org/
> > epiphany simply gets stuck, resending the same request again and
> > again. GnuTLS 2.9.6 and earlier (including 2.8.x) are fine.
> The problem seems to be the support for TLS 1.2. It seems that epiphany
> sets a priority string of "NORMAL:!VERS-TLS1.1:!VERS-TLS1.0". Thus the
> allowed versions are now TLS 1.2 and SSL 3.0. The servers do not support
> TLS 1.2 thus falling back to TLS 1.0 which is not supported.
Shouldn't GnuTLS fall back to the supported protocol (SSL 3.0) in that
case instead of getting stuck?
> A quick fix
> would be to add !VERS-TLS1.2 to epiphany (I have no idea where it is).
The respective code seems to be in libsoup
and the explaining comment points to
http://bugzilla.gnome.org/show_bug.cgi?id=581342 as reason. Apparently
epiphany experienced breakage with SSL 3.0 only servers
While changing the respective initialisation from
gnutls_priority_set_direct (session, "NORMAL:!VERS-TLS1.1:!VERS-TLS1.0", NULL)
gnutls_priority_set_direct (session, "NORMAL", NULL)
makes https://db.debian.org/ accessible again with GnuTLS 2.9.7,
it also breaks connecting to https://www.paypal.com/. Not really a
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