We are pleased to announce the availability of GnuTLS version 1.2.10, a security bug-fix release on the stable 1.2.x branch.
This release fixes several serious bugs that would make the DER decoder in libtasn1 crash on invalid input. The problems were reported by Evgeny Legerov on the 31th of January. We invite more detailed analysis of the problem, following our general security advisory approach explained on: http://www.gnu.org/software/gnutls/security.html Particularly, it would be useful to answer the question of whether these bugs are possible to exploit remotely. It is certainly possible to cause the server to crash. We don't have resources to investigate this problem more ourselves currently. To make it easier for you to review this problem, I have prepared a self test that trigger three bugs in the old libtasn1. It will be part of GnuTLS 1.3.4, in tests/certder.c. A diff between libtasn1 0.2.17 and libtasn1 0.2.18 is also available, for those wishing to analyze the changes made to address the problems. It contains a few unrelated fixes too, but it is not too large. It is available from: http://josefsson.org/gnutls/releases/libtasn1/libtasn1-0.2.18-from-0.2.17.patch Please send your analysis to [EMAIL PROTECTED] and I'll update the security advisory web page pointing to it. GnuTLS is a modern C library that implement the standard network security protocol Transport Layer Security (TLS), for use by network applications. Noteworthy changes since version 1.2.9: - Fix read out bounds bug in DER parser. Reported by Evgeny Legerov <[EMAIL PROTECTED]>, and debugging help from Protover SSL. - Libtasn1 0.2.18 is now required (contains the previous bug fix). The included version has been updated too. - Fix gnutls-cli STARTTLS hang when SIGINT is sent too quickly, thanks to Otto Maddox <[EMAIL PROTECTED]> and Nozomu Ando <[EMAIL PROTECTED]>. - Corrected a bug in certtool for 64 bit machines. Reported by Max Kellermann <[EMAIL PROTECTED]>. - Corrected bugs in gnutls_certificate_set_x509_crl() and gnutls_certificate_set_x509_trust(), that caused memory corruption if more than one certificates were added. Report and patch by Max Kellermann. - Fixed bug in non-blocking gnutls_bye(). gnutls_record_send() will no longer invalidate a session if the underlying send fails, but it will prevent future writes. That is to allow reading the already received data. Patches and bug reports by Yoann Vandoorselaere <[EMAIL PROTECTED]> 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. If you need help to use GnuTLS, or want to help others, you are invited to join our help-gnutls mailing list, see: <http://lists.gnu.org/mailman/listinfo/help-gnutls>. The project page of the library is available at: http://www.gnutls.org/ http://www.gnu.org/software/gnutls/ http://josefsson.org/gnutls/ (updated fastest) Here are the compressed sources: http://josefsson.org/gnutls/releases/gnutls-1.2.10.tar.bz2 (2.7MB) ftp://ftp.gnutls.org/pub/gnutls/gnutls-1.2.10.tar.bz2 Here are GPG detached signatures signed using key 0xB565716F: http://josefsson.org/gnutls/releases/gnutls-1.2.10.tar.bz2.sig ftp://ftp.gnutls.org/pub/gnutls/gnutls-1.2.10.tar.bz2.sig The software is cryptographically signed by the author using an OpenPGP key identified by the following information: 1280R/B565716F 2002-05-05 [expires: 2006-02-28] Key fingerprint = 0424 D4EE 81A0 E3D1 19C6 F835 EDA2 1E94 B565 716F The key is available from: http://josefsson.org/key.txt dns:b565716f.josefsson.org?TYPE=CERT Here are the build reports for various platforms: http://josefsson.org/autobuild-logs/gnutls.html Here are the SHA-1 checksums: 18140bebae006e019deb77962836bcd775256aab gnutls-1.2.10.tar.bz2 19d200ce04dc54b55d609a091500d1a2aee6e368 gnutls-1.2.10.tar.bz2.sig Enjoy, Nikos and Simon
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