Synopsis

Moderate: gnutls security update

Type/Severity

Security Advisory: Moderate

Topic

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.

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.

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

Affected Products

• Red Hat Enterprise Linux Server 5 x86_64
• Red Hat Enterprise Linux Server 5 ia64
• Red Hat Enterprise Linux Server 5 i386
• Red Hat Enterprise Linux Server - Extended Update Support 5.4 x86_64
• Red Hat Enterprise Linux Server - Extended Update Support 5.4 ia64
• Red Hat Enterprise Linux Server - Extended Update Support 5.4 i386
• Red Hat Enterprise Linux Workstation 5 x86_64
• Red Hat Enterprise Linux Workstation 5 i386
• Red Hat Enterprise Linux Desktop 5 x86_64
• Red Hat Enterprise Linux Desktop 5 i386
• Red Hat Enterprise Linux for IBM z Systems 5 s390x
• Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 5.4 s390x
• Red Hat Enterprise Linux for Power, big endian 5 ppc
• Red Hat Enterprise Linux for Power, big endian - Extended Update Support 5.4 ppc
• Red Hat Enterprise Linux Server from RHUI 5 x86_64
• Red Hat Enterprise Linux Server from RHUI 5 i386

Fixes

• BZ - 510197 - CVE-2009-2409 deprecate MD2 in SSL cert validation (Kaminsky)
• BZ - 533125 - CVE-2009-3555 TLS: MITM attacks via session renegotiation

CVEs

• CVE-2009-2409
• CVE-2009-3555

References

• http://www.redhat.com/security/updates/classification/#moderate
• http://kbase.redhat.com/faq/docs/DOC-20491

Red Hat Enterprise Linux Server 5

SRPM
gnutls-1.4.1-3.el5_4.8.src.rpm	SHA-256: c209372b01a3acde3de0d18e86640b4f65e822174b532f750231be66a0e71778
x86_64
gnutls-1.4.1-3.el5_4.8.i386.rpm	SHA-256: 42336287a94513fe675caad5a1caa7ff3dcbd43976fedd8f136e8f18f1873909
gnutls-1.4.1-3.el5_4.8.x86_64.rpm	SHA-256: 230d6a096a90338d2c085945c99612f78d7bdb88928a303b0459d273ba7e83ca
gnutls-devel-1.4.1-3.el5_4.8.i386.rpm	SHA-256: b95e6f0d887299cdf0e29ada46625b460544b16439318118835b9ac4100af400
gnutls-devel-1.4.1-3.el5_4.8.x86_64.rpm	SHA-256: 3c39de96ec02585722e8881592cc7cce109fde03664f7a666038bc48f1513767
gnutls-utils-1.4.1-3.el5_4.8.x86_64.rpm	SHA-256: d4d2f8aa08a47a13349a812b75ce4bc61be7ff8808c1ec050e5ef77fcc05dd48
ia64
gnutls-1.4.1-3.el5_4.8.i386.rpm	SHA-256: 42336287a94513fe675caad5a1caa7ff3dcbd43976fedd8f136e8f18f1873909
gnutls-1.4.1-3.el5_4.8.ia64.rpm	SHA-256: cc5637964fcf756a2512cbc791e4720348a392e1564eba1ca007dd5caa44747a
gnutls-devel-1.4.1-3.el5_4.8.ia64.rpm	SHA-256: 4242d3f6bcc99badd243c7addef3890ab51dfd96e04863c6963497af6dc1feca
gnutls-utils-1.4.1-3.el5_4.8.ia64.rpm	SHA-256: 6a6e4f3d6ea38f8021dbaab55e0f47daea67ac0747c4173fd3bb1b0cf2dbbb86
i386
gnutls-1.4.1-3.el5_4.8.i386.rpm	SHA-256: 42336287a94513fe675caad5a1caa7ff3dcbd43976fedd8f136e8f18f1873909
gnutls-devel-1.4.1-3.el5_4.8.i386.rpm	SHA-256: b95e6f0d887299cdf0e29ada46625b460544b16439318118835b9ac4100af400
gnutls-utils-1.4.1-3.el5_4.8.i386.rpm	SHA-256: eca94d51272e258cb88928defca80793d74b74eb11fd9f27eca8076596e22cc7

Red Hat Enterprise Linux Workstation 5

SRPM
gnutls-1.4.1-3.el5_4.8.src.rpm	SHA-256: c209372b01a3acde3de0d18e86640b4f65e822174b532f750231be66a0e71778
x86_64
gnutls-1.4.1-3.el5_4.8.i386.rpm	SHA-256: 42336287a94513fe675caad5a1caa7ff3dcbd43976fedd8f136e8f18f1873909
gnutls-1.4.1-3.el5_4.8.x86_64.rpm	SHA-256: 230d6a096a90338d2c085945c99612f78d7bdb88928a303b0459d273ba7e83ca
gnutls-devel-1.4.1-3.el5_4.8.i386.rpm	SHA-256: b95e6f0d887299cdf0e29ada46625b460544b16439318118835b9ac4100af400
gnutls-devel-1.4.1-3.el5_4.8.x86_64.rpm	SHA-256: 3c39de96ec02585722e8881592cc7cce109fde03664f7a666038bc48f1513767
gnutls-utils-1.4.1-3.el5_4.8.x86_64.rpm	SHA-256: d4d2f8aa08a47a13349a812b75ce4bc61be7ff8808c1ec050e5ef77fcc05dd48
i386
gnutls-1.4.1-3.el5_4.8.i386.rpm	SHA-256: 42336287a94513fe675caad5a1caa7ff3dcbd43976fedd8f136e8f18f1873909
gnutls-devel-1.4.1-3.el5_4.8.i386.rpm	SHA-256: b95e6f0d887299cdf0e29ada46625b460544b16439318118835b9ac4100af400
gnutls-utils-1.4.1-3.el5_4.8.i386.rpm	SHA-256: eca94d51272e258cb88928defca80793d74b74eb11fd9f27eca8076596e22cc7

Red Hat Enterprise Linux Desktop 5

SRPM
gnutls-1.4.1-3.el5_4.8.src.rpm	SHA-256: c209372b01a3acde3de0d18e86640b4f65e822174b532f750231be66a0e71778
x86_64
gnutls-1.4.1-3.el5_4.8.i386.rpm	SHA-256: 42336287a94513fe675caad5a1caa7ff3dcbd43976fedd8f136e8f18f1873909
gnutls-1.4.1-3.el5_4.8.x86_64.rpm	SHA-256: 230d6a096a90338d2c085945c99612f78d7bdb88928a303b0459d273ba7e83ca
gnutls-utils-1.4.1-3.el5_4.8.x86_64.rpm	SHA-256: d4d2f8aa08a47a13349a812b75ce4bc61be7ff8808c1ec050e5ef77fcc05dd48
i386
gnutls-1.4.1-3.el5_4.8.i386.rpm	SHA-256: 42336287a94513fe675caad5a1caa7ff3dcbd43976fedd8f136e8f18f1873909
gnutls-utils-1.4.1-3.el5_4.8.i386.rpm	SHA-256: eca94d51272e258cb88928defca80793d74b74eb11fd9f27eca8076596e22cc7

Red Hat Enterprise Linux for IBM z Systems 5

SRPM
gnutls-1.4.1-3.el5_4.8.src.rpm	SHA-256: c209372b01a3acde3de0d18e86640b4f65e822174b532f750231be66a0e71778
s390x
gnutls-1.4.1-3.el5_4.8.s390.rpm	SHA-256: c6fb5381002dff0ea89155820ba8c15988456de081d540cfc98e4c8e6cb7e0b2
gnutls-1.4.1-3.el5_4.8.s390x.rpm	SHA-256: 4626d34570e85d5c8a7bb277c17cf15d4181dfc48aade3b8550aac17c1201aef
gnutls-devel-1.4.1-3.el5_4.8.s390.rpm	SHA-256: 82fac1518824406c01d88059302c6eb96c4e06174ec90e0aae171de25b0612bf
gnutls-devel-1.4.1-3.el5_4.8.s390x.rpm	SHA-256: 7e24637d0a0920da92928cb3f05da4866fd5ee656b7271f216cce2b86d5408b8
gnutls-utils-1.4.1-3.el5_4.8.s390x.rpm	SHA-256: d905e632139326be552cb7782ca2bd98004b0661c581134d7a35da76e595cc3a

Red Hat Enterprise Linux for Power, big endian 5

SRPM
gnutls-1.4.1-3.el5_4.8.src.rpm	SHA-256: c209372b01a3acde3de0d18e86640b4f65e822174b532f750231be66a0e71778
ppc
gnutls-1.4.1-3.el5_4.8.ppc.rpm	SHA-256: 27e6988241d73dcdf230a1b1ff7ea6ae6da84a4eb1fcb55e65e89f2b5f45083f
gnutls-1.4.1-3.el5_4.8.ppc64.rpm	SHA-256: 3840f4d00f72bde489f1b1b16cd2192881577ba77932ab1b7960fea1ca710a57
gnutls-devel-1.4.1-3.el5_4.8.ppc.rpm	SHA-256: 2d80a0024a96901f5cc177d23190c7895947fa6015d67e7e62d07dabca676633
gnutls-devel-1.4.1-3.el5_4.8.ppc64.rpm	SHA-256: e472108c9f421d0d6417dce402b609c67b6f69f2aed00397fa1a91b5bb29d255
gnutls-utils-1.4.1-3.el5_4.8.ppc.rpm	SHA-256: e7b11fe757a2a82772a9e58aa7afafeb3c9d1aec8187d393238ef899165f8629

Red Hat Enterprise Linux Server from RHUI 5

SRPM
gnutls-1.4.1-3.el5_4.8.src.rpm	SHA-256: c209372b01a3acde3de0d18e86640b4f65e822174b532f750231be66a0e71778
x86_64
gnutls-1.4.1-3.el5_4.8.i386.rpm	SHA-256: 42336287a94513fe675caad5a1caa7ff3dcbd43976fedd8f136e8f18f1873909
gnutls-1.4.1-3.el5_4.8.x86_64.rpm	SHA-256: 230d6a096a90338d2c085945c99612f78d7bdb88928a303b0459d273ba7e83ca
gnutls-devel-1.4.1-3.el5_4.8.i386.rpm	SHA-256: b95e6f0d887299cdf0e29ada46625b460544b16439318118835b9ac4100af400
gnutls-devel-1.4.1-3.el5_4.8.x86_64.rpm	SHA-256: 3c39de96ec02585722e8881592cc7cce109fde03664f7a666038bc48f1513767
gnutls-utils-1.4.1-3.el5_4.8.x86_64.rpm	SHA-256: d4d2f8aa08a47a13349a812b75ce4bc61be7ff8808c1ec050e5ef77fcc05dd48
i386
gnutls-1.4.1-3.el5_4.8.i386.rpm	SHA-256: 42336287a94513fe675caad5a1caa7ff3dcbd43976fedd8f136e8f18f1873909
gnutls-devel-1.4.1-3.el5_4.8.i386.rpm	SHA-256: b95e6f0d887299cdf0e29ada46625b460544b16439318118835b9ac4100af400
gnutls-utils-1.4.1-3.el5_4.8.i386.rpm	SHA-256: eca94d51272e258cb88928defca80793d74b74eb11fd9f27eca8076596e22cc7