Full Disclosure: [ MDKSA-2006:166 ] - Updated gnutls packages fixes PKCS signature verification issue.

From: <security_at_mandriva.com>
Date: Wed, 20 Sep 2006 17:26:00 -0600

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

_______________________________________________________________________

Mandriva Linux Security Advisory MDKSA-2006:166
http://www.mandriva.com/security/
_______________________________________________________________________

Package : gnutls
Date : September 19, 2006
Affected: 2006.0, Corporate 4.0
_______________________________________________________________________

Problem Description:

verify.c in GnuTLS before 1.4.4, when using an RSA key with exponent 3,
does not properly handle excess data in the digestAlgorithm.parameters
field when generating a hash, which allows remote attackers to forge a
PKCS #1 v1.5 signature that is signed by that RSA key and prevents
GnuTLS from correctly verifying X.509 and other certificates that use
PKCS, a variant of CVE-2006-4339.

The provided packages have been patched to correct this issues.
_______________________________________________________________________

References:

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-4790
_______________________________________________________________________

Updated Packages:

Mandriva Linux 2006.0:
7cb7aa3309af51dc44ca8bc9f855bb9b 2006.0/i586/gnutls-1.0.25-2.2.20060mdk.i586.rpm
e30b5de1b0500830cfbcfbb7a845967d 2006.0/i586/libgnutls11-1.0.25-2.2.20060mdk.i586.rpm
ddbe8a9d665b50a4614fee5251a8dc39 2006.0/i586/libgnutls11-devel-1.0.25-2.2.20060mdk.i586.rpm
aea1556e219f37a6f4be8dadce721830 2006.0/SRPMS/gnutls-1.0.25-2.2.20060mdk.src.rpm

Mandriva Linux 2006.0/X86_64:
bd9f806eb2319b5d258d142154011650 2006.0/x86_64/gnutls-1.0.25-2.2.20060mdk.x86_64.rpm
b8046dacc5e4fd5cd11acd7139fba8d9 2006.0/x86_64/lib64gnutls11-1.0.25-2.2.20060mdk.x86_64.rpm
f26c571f9379dcae4efe5ccb5ddd1bce 2006.0/x86_64/lib64gnutls11-devel-1.0.25-2.2.20060mdk.x86_64.rpm
e30b5de1b0500830cfbcfbb7a845967d 2006.0/x86_64/libgnutls11-1.0.25-2.2.20060mdk.i586.rpm
ddbe8a9d665b50a4614fee5251a8dc39 2006.0/x86_64/libgnutls11-devel-1.0.25-2.2.20060mdk.i586.rpm
aea1556e219f37a6f4be8dadce721830 2006.0/SRPMS/gnutls-1.0.25-2.2.20060mdk.src.rpm

Corporate 4.0:
a2254e8a31891b8bcc609f3cf13c62bb corporate/4.0/i586/gnutls-1.0.25-2.2.20060mlcs4.i586.rpm
41b00f4035f895b1e7b51522d1b31342 corporate/4.0/i586/libgnutls11-1.0.25-2.2.20060mlcs4.i586.rpm
2e74d9730bb73ec4cd4ccd584bd184b9 corporate/4.0/i586/libgnutls11-devel-1.0.25-2.2.20060mlcs4.i586.rpm
1e1ff2a8e7eabe7d152c98076f564476 corporate/4.0/SRPMS/gnutls-1.0.25-2.2.20060mlcs4.src.rpm

Corporate 4.0/X86_64:
05843e5fd72d31c80c5d8218cf18d812 corporate/4.0/x86_64/gnutls-1.0.25-2.2.20060mlcs4.x86_64.rpm
112708823292a1f1ca17fa68daac8373 corporate/4.0/x86_64/lib64gnutls11-1.0.25-2.2.20060mlcs4.x86_64.rpm
a0eaae0c87a0a56ef69a11c8db598fb8 corporate/4.0/x86_64/lib64gnutls11-devel-1.0.25-2.2.20060mlcs4.x86_64.rpm
41b00f4035f895b1e7b51522d1b31342 corporate/4.0/x86_64/libgnutls11-1.0.25-2.2.20060mlcs4.i586.rpm
2e74d9730bb73ec4cd4ccd584bd184b9 corporate/4.0/x86_64/libgnutls11-devel-1.0.25-2.2.20060mlcs4.i586.rpm
1e1ff2a8e7eabe7d152c98076f564476 corporate/4.0/SRPMS/gnutls-1.0.25-2.2.20060mlcs4.src.rpm
_______________________________________________________________________

To upgrade automatically use MandrivaUpdate or urpmi. The verification
of md5 checksums and GPG signatures is performed automatically for you.

All packages are signed by Mandriva for security. You can obtain the
GPG public key of the Mandriva Security Team by executing:

gpg --recv-keys --keyserver pgp.mit.edu 0x22458A98

You can view other update advisories for Mandriva Linux at:

http://www.mandriva.com/security/advisories

If you want to report vulnerabilities, please contact

security_(at)_mandriva.com
_______________________________________________________________________

Type Bits/KeyID Date User ID
pub 1024D/22458A98 2000-07-10 Mandriva Security Team
<security*mandriva.com>
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.2.2 (GNU/Linux)

iD8DBQFFEawJmqjQ0CJFipgRAqFdAKC44hSOcU7Pqbt7V0XHz9HHDIKbqwCfUWK1
FGp443EESX1+sjPf4EDaEwQ=
=Lqox
-----END PGP SIGNATURE-----

_______________________________________________
Full-Disclosure - We believe in it.
Charter: http://lists.grok.org.uk/full-disclosure-charter.html
Hosted and sponsored by Secunia - http://secunia.com/
Received on Sep 20 2006