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[RHSA-2010:0166-01] Moderate: gnutls security update

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Red Hat Security Advisory

 

Synopsis: Moderate: gnutls security update

Advisory ID: RHSA-2010:0166-01

Product: Red Hat Enterprise Linux

Advisory URL: https://rhn.redhat.com/errata/RHSA-2010-0166.html

Issue date: 2010-03-25

CVE Names: CVE-2009-2409 CVE-2009-3555

=====================================================================

 

1. Summary:

 

Updated gnutls packages that fix two security issues are now available for

Red Hat Enterprise Linux 5.

 

The Red Hat Security Response Team has rated this update as having moderate

security impact. Common Vulnerability Scoring System (CVSS) base scores,

which give detailed severity ratings, are available for each vulnerability

from the CVE links in the References section.

 

2. Relevant releases/architectures:

 

RHEL Desktop Workstation (v. 5 client) - i386, x86_64

Red Hat Enterprise Linux (v. 5 server) - i386, ia64, ppc, s390x, x86_64

Red Hat Enterprise Linux Desktop (v. 5 client) - i386, x86_64

 

3. Description:

 

The GnuTLS library provides support for cryptographic algorithms and for

protocols such as Transport Layer Security (TLS).

 

A flaw was found in the way the TLS/SSL (Transport Layer Security/Secure

Sockets Layer) protocols handled session renegotiation. A man-in-the-middle

attacker could use this flaw to prefix arbitrary plain text to a client's

session (for example, an HTTPS connection to a website). This could force

the server to process an attacker's request as if authenticated using the

victim's credentials. This update addresses this flaw by implementing the

TLS Renegotiation Indication Extension, as defined in RFC 5746.

(CVE-2009-3555)

 

Refer to the following Knowledgebase article for additional details about

the CVE-2009-3555 flaw: http://kbase.redhat.com/faq/docs/DOC-20491

 

Dan Kaminsky found that browsers could accept certificates with MD2 hash

signatures, even though MD2 is no longer considered a cryptographically

strong algorithm. This could make it easier for an attacker to create a

malicious certificate that would be treated as trusted by a browser. GnuTLS

now disables the use of the MD2 algorithm inside signatures by default.

(CVE-2009-2409)

 

Users of GnuTLS are advised to upgrade to these updated packages, which

contain backported patches to correct these issues. For the update to take

effect, all applications linked to the GnuTLS library must be restarted, or

the system rebooted.

 

4. Solution:

 

Before applying this update, make sure all previously-released errata

relevant to your system have been applied.

 

This update is available via the Red Hat Network. Details on how to

use the Red Hat Network to apply this update are available at

http://kbase.redhat.com/faq/docs/DOC-11259

 

5. Bugs fixed (http://bugzilla.redhat.com/):

 

510197 - CVE-2009-2409 deprecate MD2 in SSL cert validation (Kaminsky)

533125 - CVE-2009-3555 TLS: MITM attacks via session renegotiation

 

6. Package List:

 

Red Hat Enterprise Linux Desktop (v. 5 client):

 

Source:

ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Client/en/os/SRPMS/gnutls-1.4.1-3.el5_4.8.src.rpm

 

i386:

gnutls-1.4.1-3.el5_4.8.i386.rpm

gnutls-debuginfo-1.4.1-3.el5_4.8.i386.rpm

gnutls-utils-1.4.1-3.el5_4.8.i386.rpm

 

x86_64:

gnutls-1.4.1-3.el5_4.8.i386.rpm

gnutls-1.4.1-3.el5_4.8.x86_64.rpm

gnutls-debuginfo-1.4.1-3.el5_4.8.i386.rpm

gnutls-debuginfo-1.4.1-3.el5_4.8.x86_64.rpm

gnutls-utils-1.4.1-3.el5_4.8.x86_64.rpm

 

RHEL Desktop Workstation (v. 5 client):

 

Source:

ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Client/en/os/SRPMS/gnutls-1.4.1-3.el5_4.8.src.rpm

 

i386:

gnutls-debuginfo-1.4.1-3.el5_4.8.i386.rpm

gnutls-devel-1.4.1-3.el5_4.8.i386.rpm

 

x86_64:

gnutls-debuginfo-1.4.1-3.el5_4.8.i386.rpm

gnutls-debuginfo-1.4.1-3.el5_4.8.x86_64.rpm

gnutls-devel-1.4.1-3.el5_4.8.i386.rpm

gnutls-devel-1.4.1-3.el5_4.8.x86_64.rpm

 

Red Hat Enterprise Linux (v. 5 server):

 

Source:

ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Server/en/os/SRPMS/gnutls-1.4.1-3.el5_4.8.src.rpm

 

i386:

gnutls-1.4.1-3.el5_4.8.i386.rpm

gnutls-debuginfo-1.4.1-3.el5_4.8.i386.rpm

gnutls-devel-1.4.1-3.el5_4.8.i386.rpm

gnutls-utils-1.4.1-3.el5_4.8.i386.rpm

 

ia64:

gnutls-1.4.1-3.el5_4.8.i386.rpm

gnutls-1.4.1-3.el5_4.8.ia64.rpm

gnutls-debuginfo-1.4.1-3.el5_4.8.i386.rpm

gnutls-debuginfo-1.4.1-3.el5_4.8.ia64.rpm

gnutls-devel-1.4.1-3.el5_4.8.ia64.rpm

gnutls-utils-1.4.1-3.el5_4.8.ia64.rpm

 

ppc:

gnutls-1.4.1-3.el5_4.8.ppc.rpm

gnutls-1.4.1-3.el5_4.8.ppc64.rpm

gnutls-debuginfo-1.4.1-3.el5_4.8.ppc.rpm

gnutls-debuginfo-1.4.1-3.el5_4.8.ppc64.rpm

gnutls-devel-1.4.1-3.el5_4.8.ppc.rpm

gnutls-devel-1.4.1-3.el5_4.8.ppc64.rpm

gnutls-utils-1.4.1-3.el5_4.8.ppc.rpm

 

s390x:

gnutls-1.4.1-3.el5_4.8.s390.rpm

gnutls-1.4.1-3.el5_4.8.s390x.rpm

gnutls-debuginfo-1.4.1-3.el5_4.8.s390.rpm

gnutls-debuginfo-1.4.1-3.el5_4.8.s390x.rpm

gnutls-devel-1.4.1-3.el5_4.8.s390.rpm

gnutls-devel-1.4.1-3.el5_4.8.s390x.rpm

gnutls-utils-1.4.1-3.el5_4.8.s390x.rpm

 

x86_64:

gnutls-1.4.1-3.el5_4.8.i386.rpm

gnutls-1.4.1-3.el5_4.8.x86_64.rpm

gnutls-debuginfo-1.4.1-3.el5_4.8.i386.rpm

gnutls-debuginfo-1.4.1-3.el5_4.8.x86_64.rpm

gnutls-devel-1.4.1-3.el5_4.8.i386.rpm

gnutls-devel-1.4.1-3.el5_4.8.x86_64.rpm

gnutls-utils-1.4.1-3.el5_4.8.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

https://www.redhat.com/security/team/key/#package

 

7. References:

 

https://www.redhat.com/security/data/cve/CVE-2009-2409.html

https://www.redhat.com/security/data/cve/CVE-2009-3555.html

http://www.redhat.com/security/updates/classification/#moderate

http://kbase.redhat.com/faq/docs/DOC-20491

 

8. Contact:

 

The Red Hat security contact is . More contact

details at https://www.redhat.com/security/team/contact/

 

Copyright 2010 Red Hat, Inc.

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