[gnutls-dev] GnuTLS 1.4.3

Simon Josefsson jas at extundo.com
Fri Sep 8 17:26:01 CEST 2006

I am happy to announce GnuTLS 1.4.3, a security bugfix release on the
stable 1.4 branch.  This version is what we recommend for those who
need a stable version of GnuTLS.

GnuTLS is a modern C library that implement the standard network
security protocol Transport Layer Security (TLS), for use by network

Noteworthy changes since 1.4.2:

** Fix PKCS#1 verification to avoid a variant of Bleichenbacher's
** Crypto 06 rump session attack.
In particular, we check that the digestAlgorithm.parameters field is
empty, to avoid that it can contain "garbage" that may be used to
alter the numeric properties of the signature.  See
<http://www.imc.org/ietf-openpgp/mail-archive/msg14307.html> (which is
not exactly the same as the problem we fix here).  Reported by Yutaka
OIWA <y.oiwa at aist.go.jp>.

See GNUTLS-SA-2006-4 on http://www.gnutls.org/security.html for more
up to date information.

** Fix PKCS#1 decryption to avoid Bleichenbacher's Crypto 98 attack.
See <http://www.bell-labs.com/user/bleichen/papers/pkcs.ps.gz>.
Reported by Werner Koch <wk at gnupg.org>.

See GNUTLS-SA-2006-3 on http://www.gnutls.org/security.html for more
up to date information.

** Fix crash in gnutls_x509_crt_sign2 if passed a NULL issuer_key.

** API and ABI modifications:
No changes since last version.

Improving GnuTLS is costly, but you can help!  We are looking for
organizations that find GnuTLS useful and wish to contribute back.
You can contribute by reporting bugs, improve the software, or donate
money or equipment.

Commercial support contracts for GnuTLS are available, and they help
finance continued maintenance.  Simon Josefsson Datakonsult, a
Stockholm based privately held company, is currently funding GnuTLS
maintenance.  We are always looking for interesting development
projects.  See http://josefsson.org/ for more details.

All manual formats are available from:

Direct link to the most popular formats:
  http://www.gnutls.org/manual/gnutls.html - HTML format
  http://www.gnutls.org/manual/gnutls.pdf  - PDF format
  http://www.gnutls.org/reference/ch01.html  - API Reference, GTK-DOC HTML

If you need help to use GnuTLS, or want to help others, you are
invited to join our help-gnutls mailing list, see:

The project page of the library is available at:

Here are the compressed sources (3.9MB):

Here are GPG detached signatures signed using key 0xB565716F:

The software is cryptographically signed by the author using an
OpenPGP key identified by the following information:

pub   1280R/B565716F 2002-05-05 [expires: 2007-02-15]
uid                  Simon Josefsson <jas at extundo.com>
uid                  Simon Josefsson <simon at josefsson.org>
sub   1280R/4D5D40AE 2002-05-05 [expires: 2007-02-15]
sub   1024R/09CC4670 2006-03-18 [expires: 2007-04-22]
sub   1024R/AABB1F7B 2006-03-18 [expires: 2007-04-22]
sub   1024R/A14C401A 2006-03-18 [expires: 2007-04-22]

The key is available from:

Here are the SHA-1 and SHA-224 checksums:

c4182c3804235d6f3eb2f3e59bb560f22370d4fc  gnutls-1.4.3.tar.bz2
b95c5be42a41050328c70a6bee0c5fe0df20274e  gnutls-1.4.3.tar.bz2.sig

7cd58744ba1a4628f75f2c9dda2d6af4fcbda28ba155e6afead3035e  gnutls-1.4.3.tar.bz2
b84e8452859d3c98575cd5a5a1f6d161dc4c4f63bc7803a4626425ef  gnutls-1.4.3.tar.bz2.sig

Nikos and Simon
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