[RHSA-2012:0428-01] Important: gnutls security update

[news 28]

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Red Hat Security Advisory

 

Synopsis: Important: gnutls security update

Advisory ID: RHSA-2012:0428-01

Product: Red Hat Enterprise Linux

Advisory URL: https://rhn.redhat.com/errata/RHSA-2012-0428.html

Issue date: 2012-03-27

CVE Names: CVE-2011-4128 CVE-2012-1569 CVE-2012-1573

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1. Summary:

 

Updated gnutls packages that fix three security issues are now available

for Red Hat Enterprise Linux 5.

 

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

important 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). GnuTLS includes libtasn1,

a library developed for ASN.1 (Abstract Syntax Notation One) structures

management that includes DER (Distinguished Encoding Rules) encoding and

decoding.

 

A flaw was found in the way GnuTLS decrypted malformed TLS records. This

could cause a TLS/SSL client or server to crash when processing a

specially-crafted TLS record from a remote TLS/SSL connection peer.

(CVE-2012-1573)

 

A flaw was found in the way libtasn1 decoded DER data. An attacker could

create a carefully-crafted X.509 certificate that, when parsed by an

application that uses GnuTLS, could cause the application to crash.

(CVE-2012-1569)

 

A boundary error was found in the gnutls_session_get_data() function. A

malicious TLS/SSL server could use this flaw to crash a TLS/SSL client or,

possibly, execute arbitrary code as the client, if the client passed a

fixed-sized buffer to gnutls_session_get_data() before checking the real

size of the session data provided by the server. (CVE-2011-4128)

 

Red Hat would like to thank Matthew Hall of Mu Dynamics for reporting

CVE-2012-1573 and CVE-2012-1569.

 

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

https://access.redhat.com/knowledge/articles/11258

 

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

 

752308 - CVE-2011-4128 gnutls: buffer overflow in gnutls_session_get_data() (GNUTLS-SA-2011-2)

804920 - CVE-2012-1569 libtasn1: DER decoding buffer overflow (GNUTLS-SA-2012-3, MU-201202-02)

805432 - CVE-2012-1573 gnutls: TLS record handling issue (GNUTLS-SA-2012-2, MU-201202-01)

 

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-1.4.1-7.el5_8.2.src.rpm

 

i386:

gnutls-1.4.1-7.el5_8.2.i386.rpm

gnutls-debuginfo-1.4.1-7.el5_8.2.i386.rpm

gnutls-utils-1.4.1-7.el5_8.2.i386.rpm

 

x86_64:

gnutls-1.4.1-7.el5_8.2.i386.rpm

gnutls-1.4.1-7.el5_8.2.x86_64.rpm

gnutls-debuginfo-1.4.1-7.el5_8.2.i386.rpm

gnutls-debuginfo-1.4.1-7.el5_8.2.x86_64.rpm

gnutls-utils-1.4.1-7.el5_8.2.x86_64.rpm

 

RHEL Desktop Workstation (v. 5 client):

 

Source:

ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Client/en/os/SRPMS/gnutls-1.4.1-7.el5_8.2.src.rpm

 

i386:

gnutls-debuginfo-1.4.1-7.el5_8.2.i386.rpm

gnutls-devel-1.4.1-7.el5_8.2.i386.rpm

 

x86_64:

gnutls-debuginfo-1.4.1-7.el5_8.2.i386.rpm

gnutls-debuginfo-1.4.1-7.el5_8.2.x86_64.rpm

gnutls-devel-1.4.1-7.el5_8.2.i386.rpm

gnutls-devel-1.4.1-7.el5_8.2.x86_64.rpm

 

Red Hat Enterprise Linux (v. 5 server):

 

Source:

ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Server/en/os/SRPMS/gnutls-1.4.1-7.el5_8.2.src.rpm

 

i386:

gnutls-1.4.1-7.el5_8.2.i386.rpm

gnutls-debuginfo-1.4.1-7.el5_8.2.i386.rpm

gnutls-devel-1.4.1-7.el5_8.2.i386.rpm

gnutls-utils-1.4.1-7.el5_8.2.i386.rpm

 

ia64:

gnutls-1.4.1-7.el5_8.2.i386.rpm

gnutls-1.4.1-7.el5_8.2.ia64.rpm

gnutls-debuginfo-1.4.1-7.el5_8.2.i386.rpm

gnutls-debuginfo-1.4.1-7.el5_8.2.ia64.rpm

gnutls-devel-1.4.1-7.el5_8.2.ia64.rpm

gnutls-utils-1.4.1-7.el5_8.2.ia64.rpm

 

ppc:

gnutls-1.4.1-7.el5_8.2.ppc.rpm

gnutls-1.4.1-7.el5_8.2.ppc64.rpm

gnutls-debuginfo-1.4.1-7.el5_8.2.ppc.rpm

gnutls-debuginfo-1.4.1-7.el5_8.2.ppc64.rpm

gnutls-devel-1.4.1-7.el5_8.2.ppc.rpm

gnutls-devel-1.4.1-7.el5_8.2.ppc64.rpm

gnutls-utils-1.4.1-7.el5_8.2.ppc.rpm

 

s390x:

gnutls-1.4.1-7.el5_8.2.s390.rpm

gnutls-1.4.1-7.el5_8.2.s390x.rpm

gnutls-debuginfo-1.4.1-7.el5_8.2.s390.rpm

gnutls-debuginfo-1.4.1-7.el5_8.2.s390x.rpm

gnutls-devel-1.4.1-7.el5_8.2.s390.rpm

gnutls-devel-1.4.1-7.el5_8.2.s390x.rpm

gnutls-utils-1.4.1-7.el5_8.2.s390x.rpm

 

x86_64:

gnutls-1.4.1-7.el5_8.2.i386.rpm

gnutls-1.4.1-7.el5_8.2.x86_64.rpm

gnutls-debuginfo-1.4.1-7.el5_8.2.i386.rpm

gnutls-debuginfo-1.4.1-7.el5_8.2.x86_64.rpm

gnutls-devel-1.4.1-7.el5_8.2.i386.rpm

gnutls-devel-1.4.1-7.el5_8.2.x86_64.rpm

gnutls-utils-1.4.1-7.el5_8.2.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://access.redhat.com/security/team/key/#package

 

7. References:

 

https://www.redhat.com/security/data/cve/CVE-2011-4128.html

https://www.redhat.com/security/data/cve/CVE-2012-1569.html

https://www.redhat.com/security/data/cve/CVE-2012-1573.html

https://access.redhat.com/security/updates/classification/#important

 

8. Contact:

 

The Red Hat security contact is . More contact

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

 

Copyright 2012 Red Hat, Inc.

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