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Red Hat Security Advisory
Synopsis: Important: gnutls security update
Advisory ID: RHSA-2006:0680-01
Advisory URL: htt
ps://rhn.redhat.com/errata/RHSA-2006-0680.html
Issue date: 2006-09-14
Updated on: 2006-09-14
Product: Red Hat Enterprise Linux
CVE Names: CVE-2006-4790
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1. Summary:
Updated gnutls packages that fix a security issue are now
available for Red
Hat Enterprise Linux 4.
This update has been rated as having important security
impact by the Red
Hat Security Response Team.
2. Relevant releases/architectures:
Red Hat Enterprise Linux AS version 4 - i386, ia64, ppc,
s390, s390x, x86_64
Red Hat Enterprise Linux Desktop version 4 - i386, x86_64
Red Hat Enterprise Linux ES version 4 - i386, ia64, x86_64
Red Hat Enterprise Linux WS version 4 - i386, ia64, x86_64
3. Problem description:
The GnuTLS Library provides support for cryptographic
algorithms and
protocols such as TLS. GnuTLS includes libtasn1, a library
developed for
ASN.1 structures management that includes DER encoding and
decoding.
Daniel Bleichenbacher recently described an attack on PKCS
#1 v1.5
signatures. Where an RSA key with exponent 3 is used it may
be possible for
an attacker to forge a PKCS #1 v1.5 signature that would be
incorrectly
verified by implementations that do not check for excess
data in the RSA
exponentiation result of the signature.
The core GnuTLS team discovered that GnuTLS is vulnerable to
a variant of
the Bleichenbacker attack. This issue affects applications
that use GnuTLS
to verify X.509 certificates as well as other uses of PKCS
#1 v1.5.
(CVE-2006-4790)
In Red Hat Enterprise Linux 4, the GnuTLS library is only
used by the
Evolution client when connecting to an Exchange server or
when publishing
calendar information to a WebDAV server.
Users are advised to upgrade to these updated packages,
which contain a
backported patch from the GnuTLS maintainers to correct this
issue.
4. Solution:
Before applying this update, make sure all previously
released errata
relevant to your system have been applied.
This update is available via Red Hat Network. To use Red
Hat Network,
launch the Red Hat Update Agent with the following command:
up2date
This will start an interactive process that will result in
the appropriate
RPMs being upgraded on your system.
5. Bug IDs fixed (http://bugzilla.redhat.co
m/):
206411 - CVE-2006-4790 RSA forgery affects gnutls
6. RPMs required:
Red Hat Enterprise Linux AS version 4:
SRPMS:
ftp://updates.redhat.com/enterprise/4AS/en/os/SRPMS/gnutls-1
.0.20-3.2.3.src.rpm
60106ff0a4fcc6bdfab8d262c1157469
gnutls-1.0.20-3.2.3.src.rpm
i386:
f749e542a24f251e6dc2603c9cce1402
gnutls-1.0.20-3.2.3.i386.rpm
91a8b01e402bc0a8c6a298b504f1f89d
gnutls-debuginfo-1.0.20-3.2.3.i386.rpm
60cb9b56ffab6fc8ec9df1f53c82da51
gnutls-devel-1.0.20-3.2.3.i386.rpm
ia64:
f749e542a24f251e6dc2603c9cce1402
gnutls-1.0.20-3.2.3.i386.rpm
84cec28ca548482b2409eba04bc5cc2a
gnutls-1.0.20-3.2.3.ia64.rpm
91a8b01e402bc0a8c6a298b504f1f89d
gnutls-debuginfo-1.0.20-3.2.3.i386.rpm
a49fa92fae38882c930ec62c98f41b88
gnutls-debuginfo-1.0.20-3.2.3.ia64.rpm
fd378955aa68beb8b695f54a5b96e32a
gnutls-devel-1.0.20-3.2.3.ia64.rpm
ppc:
5fe6d74ce6a3cba718f73727c15da477
gnutls-1.0.20-3.2.3.ppc.rpm
d80d9c580e4f9fb2618d507ebcd04cd4
gnutls-1.0.20-3.2.3.ppc64.rpm
333733276d385a239998945576296d79
gnutls-debuginfo-1.0.20-3.2.3.ppc.rpm
3c38dd8f661acfd9aaff889437958905
gnutls-debuginfo-1.0.20-3.2.3.ppc64.rpm
38d15bbdbc6bfa0a42c59af2c4721800
gnutls-devel-1.0.20-3.2.3.ppc.rpm
s390:
0d492813efdd04c1857a070c3365b603
gnutls-1.0.20-3.2.3.s390.rpm
9d202406a60b67b6f737f41a77b766c3
gnutls-debuginfo-1.0.20-3.2.3.s390.rpm
48ee2a6d838bdb54a8965af9e2a4a2d5
gnutls-devel-1.0.20-3.2.3.s390.rpm
s390x:
0d492813efdd04c1857a070c3365b603
gnutls-1.0.20-3.2.3.s390.rpm
b2c8606d60365818d5e80d32ea654679
gnutls-1.0.20-3.2.3.s390x.rpm
9d202406a60b67b6f737f41a77b766c3
gnutls-debuginfo-1.0.20-3.2.3.s390.rpm
8037461d552b896fcffd895a447e46d1
gnutls-debuginfo-1.0.20-3.2.3.s390x.rpm
c9ea3c076c05e4c54ce9b85bfceb916d
gnutls-devel-1.0.20-3.2.3.s390x.rpm
x86_64:
f749e542a24f251e6dc2603c9cce1402
gnutls-1.0.20-3.2.3.i386.rpm
9f3f2b568ba75803f9d7b75385310877
gnutls-1.0.20-3.2.3.x86_64.rpm
91a8b01e402bc0a8c6a298b504f1f89d
gnutls-debuginfo-1.0.20-3.2.3.i386.rpm
79ee23a3f032fb2f04b6fa63d243849b
gnutls-debuginfo-1.0.20-3.2.3.x86_64.rpm
6917afed0d2c314879b52ce4138b47fc
gnutls-devel-1.0.20-3.2.3.x86_64.rpm
Red Hat Enterprise Linux Desktop version 4:
SRPMS:
ftp://updates.redhat.com/enterprise/4Desktop/en/os/SRPMS/gnu
tls-1.0.20-3.2.3.src.rpm
60106ff0a4fcc6bdfab8d262c1157469
gnutls-1.0.20-3.2.3.src.rpm
i386:
f749e542a24f251e6dc2603c9cce1402
gnutls-1.0.20-3.2.3.i386.rpm
91a8b01e402bc0a8c6a298b504f1f89d
gnutls-debuginfo-1.0.20-3.2.3.i386.rpm
60cb9b56ffab6fc8ec9df1f53c82da51
gnutls-devel-1.0.20-3.2.3.i386.rpm
x86_64:
f749e542a24f251e6dc2603c9cce1402
gnutls-1.0.20-3.2.3.i386.rpm
9f3f2b568ba75803f9d7b75385310877
gnutls-1.0.20-3.2.3.x86_64.rpm
91a8b01e402bc0a8c6a298b504f1f89d
gnutls-debuginfo-1.0.20-3.2.3.i386.rpm
79ee23a3f032fb2f04b6fa63d243849b
gnutls-debuginfo-1.0.20-3.2.3.x86_64.rpm
6917afed0d2c314879b52ce4138b47fc
gnutls-devel-1.0.20-3.2.3.x86_64.rpm
Red Hat Enterprise Linux ES version 4:
SRPMS:
ftp://updates.redhat.com/enterprise/4ES/en/os/SRPMS/gnutls-1
.0.20-3.2.3.src.rpm
60106ff0a4fcc6bdfab8d262c1157469
gnutls-1.0.20-3.2.3.src.rpm
i386:
f749e542a24f251e6dc2603c9cce1402
gnutls-1.0.20-3.2.3.i386.rpm
91a8b01e402bc0a8c6a298b504f1f89d
gnutls-debuginfo-1.0.20-3.2.3.i386.rpm
60cb9b56ffab6fc8ec9df1f53c82da51
gnutls-devel-1.0.20-3.2.3.i386.rpm
ia64:
f749e542a24f251e6dc2603c9cce1402
gnutls-1.0.20-3.2.3.i386.rpm
84cec28ca548482b2409eba04bc5cc2a
gnutls-1.0.20-3.2.3.ia64.rpm
91a8b01e402bc0a8c6a298b504f1f89d
gnutls-debuginfo-1.0.20-3.2.3.i386.rpm
a49fa92fae38882c930ec62c98f41b88
gnutls-debuginfo-1.0.20-3.2.3.ia64.rpm
fd378955aa68beb8b695f54a5b96e32a
gnutls-devel-1.0.20-3.2.3.ia64.rpm
x86_64:
f749e542a24f251e6dc2603c9cce1402
gnutls-1.0.20-3.2.3.i386.rpm
9f3f2b568ba75803f9d7b75385310877
gnutls-1.0.20-3.2.3.x86_64.rpm
91a8b01e402bc0a8c6a298b504f1f89d
gnutls-debuginfo-1.0.20-3.2.3.i386.rpm
79ee23a3f032fb2f04b6fa63d243849b
gnutls-debuginfo-1.0.20-3.2.3.x86_64.rpm
6917afed0d2c314879b52ce4138b47fc
gnutls-devel-1.0.20-3.2.3.x86_64.rpm
Red Hat Enterprise Linux WS version 4:
SRPMS:
ftp://updates.redhat.com/enterprise/4WS/en/os/SRPMS/gnutls-1
.0.20-3.2.3.src.rpm
60106ff0a4fcc6bdfab8d262c1157469
gnutls-1.0.20-3.2.3.src.rpm
i386:
f749e542a24f251e6dc2603c9cce1402
gnutls-1.0.20-3.2.3.i386.rpm
91a8b01e402bc0a8c6a298b504f1f89d
gnutls-debuginfo-1.0.20-3.2.3.i386.rpm
60cb9b56ffab6fc8ec9df1f53c82da51
gnutls-devel-1.0.20-3.2.3.i386.rpm
ia64:
f749e542a24f251e6dc2603c9cce1402
gnutls-1.0.20-3.2.3.i386.rpm
84cec28ca548482b2409eba04bc5cc2a
gnutls-1.0.20-3.2.3.ia64.rpm
91a8b01e402bc0a8c6a298b504f1f89d
gnutls-debuginfo-1.0.20-3.2.3.i386.rpm
a49fa92fae38882c930ec62c98f41b88
gnutls-debuginfo-1.0.20-3.2.3.ia64.rpm
fd378955aa68beb8b695f54a5b96e32a
gnutls-devel-1.0.20-3.2.3.ia64.rpm
x86_64:
f749e542a24f251e6dc2603c9cce1402
gnutls-1.0.20-3.2.3.i386.rpm
9f3f2b568ba75803f9d7b75385310877
gnutls-1.0.20-3.2.3.x86_64.rpm
91a8b01e402bc0a8c6a298b504f1f89d
gnutls-debuginfo-1.0.20-3.2.3.i386.rpm
79ee23a3f032fb2f04b6fa63d243849b
gnutls-debuginfo-1.0.20-3.2.3.x86_64.rpm
6917afed0d2c314879b52ce4138b47fc
gnutls-devel-1.0.20-3.2.3.x86_64.rpm
These packages are GPG signed by Red Hat for security. Our
key and
details on how to verify the signature are available from
htt
ps://www.redhat.com/security/team/key/#package
7. References:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-200
6-4790
http://www.redhat.com/security/updates/classific
ation/#important
8. Contact:
The Red Hat security contact is <secalert redhat.com>. More contact
details at https:/
/www.redhat.com/security/team/contact/
Copyright 2006 Red Hat, Inc.
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