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=====================================================================
                   Red Hat Security Advisory

Synopsis:          Moderate: gnutls security, bug fix, and enhancement update
Advisory ID:       RHSA-2017:2292-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://access.redhat.com/errata/RHSA-2017:2292
Issue date:        2017-08-01
CVE Names:         CVE-2016-7444 CVE-2017-5334 CVE-2017-5335 
                   CVE-2017-5336 CVE-2017-5337 CVE-2017-7507 
                   CVE-2017-7869 
=====================================================================

1. Summary:

An update for gnutls is now available for Red Hat Enterprise Linux 7.

Red Hat Product Security has rated this update as having a security impact
of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which
gives a detailed severity rating, is available for each vulnerability from
the CVE link(s) in the References section.

2. Relevant releases/architectures:

Red Hat Enterprise Linux Client (v. 7) - x86_64
Red Hat Enterprise Linux Client Optional (v. 7) - x86_64
Red Hat Enterprise Linux ComputeNode (v. 7) - x86_64
Red Hat Enterprise Linux ComputeNode Optional (v. 7) - x86_64
Red Hat Enterprise Linux Server (v. 7) - aarch64, ppc64, ppc64le, s390x, x86_64
Red Hat Enterprise Linux Workstation (v. 7) - x86_64

3. Description:

The gnutls packages provide the GNU Transport Layer Security (GnuTLS)
library, which implements cryptographic algorithms and protocols such as
SSL, TLS, and DTLS.

The following packages have been upgraded to a later upstream version:
gnutls (3.3.26). (BZ#1378373)

Security Fix(es):

* A double-free flaw was found in the way GnuTLS parsed certain X.509
certificates with Proxy Certificate Information extension. An attacker
could create a specially-crafted certificate which, when processed by an
application compiled against GnuTLS, could cause that application to crash.
(CVE-2017-5334)

* Multiple flaws were found in the way gnutls processed OpenPGP
certificates. An attacker could create specially crafted OpenPGP
certificates which, when parsed by gnutls, would cause it to crash.
(CVE-2017-5335, CVE-2017-5336, CVE-2017-5337, CVE-2017-7869)

* A null pointer dereference flaw was found in the way GnuTLS processed
ClientHello messages with status_request extension. A remote attacker could
use this flaw to cause an application compiled with GnuTLS to crash.
(CVE-2017-7507)

* A flaw was found in the way GnuTLS validated certificates using OCSP
responses. This could falsely report a certificate as valid under certain
circumstances. (CVE-2016-7444)

The CVE-2017-7507 issue was discovered by Hubert Kario (Red Hat QE BaseOS
Security team).

Additional Changes:

For detailed information on changes in this release, see the Red Hat
Enterprise Linux 7.4 Release Notes linked from the References section.

4. Solution:

For details on how to apply this update, which includes the changes
described in this advisory, refer to:

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

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

1335931 - gnutls: Disable TLS connections with less than 1024-bit DH parameters
1374266 - CVE-2016-7444 gnutls: Incorrect certificate validation when using OCSP responses (GNUTLS-SA-2016-3)
1375303 - gnutls trusts a certificate whose CA is both explicitly trusted and blacklisted
1375463 - doc update: certtool's manpage does not mention it cannot handle PKCS#11 URLs for certain options
1378373 - RFE: Add functions to set issuer and subject id in x509 certificates
1379283 - gnutls: Support the pin-value attribute in RFC7512 URLs
1379739 - gnutls: do not require trousers
1380642 - Cannot read encrypted PKCS#8 from OpenSSL
1383748 - GnuTLS parses only the first 32 extensions, ignoring the rest
1388932 - gnutls: interoperability issue 3.3.x vs. 3.5.5
1399232 - RFE: p11tool command misses the --id option
1411835 - CVE-2017-5334 gnutls: Double-free while decoding crafted X.509 certificates
1411836 - CVE-2017-5337 gnutls: Heap read overflow in read-packet.c
1412235 - CVE-2017-5335 gnutls: Out of memory while parsing crafted OpenPGP certificate
1412236 - CVE-2017-5336 gnutls: Stack overflow in cdk_pk_get_keyid
1443033 - CVE-2017-7869 gnutls: Out-of-bounds write related to the cdk_pkt_read function (GNUTLS-SA-2017-3)
1454621 - CVE-2017-7507 gnutls: Crash upon receiving well-formed status_request extension

6. Package List:

Red Hat Enterprise Linux Client (v. 7):

Source:
gnutls-3.3.26-9.el7.src.rpm

x86_64:
gnutls-3.3.26-9.el7.i686.rpm
gnutls-3.3.26-9.el7.x86_64.rpm
gnutls-dane-3.3.26-9.el7.i686.rpm
gnutls-dane-3.3.26-9.el7.x86_64.rpm
gnutls-debuginfo-3.3.26-9.el7.i686.rpm
gnutls-debuginfo-3.3.26-9.el7.x86_64.rpm
gnutls-utils-3.3.26-9.el7.x86_64.rpm

Red Hat Enterprise Linux Client Optional (v. 7):

x86_64:
gnutls-c++-3.3.26-9.el7.i686.rpm
gnutls-c++-3.3.26-9.el7.x86_64.rpm
gnutls-debuginfo-3.3.26-9.el7.i686.rpm
gnutls-debuginfo-3.3.26-9.el7.x86_64.rpm
gnutls-devel-3.3.26-9.el7.i686.rpm
gnutls-devel-3.3.26-9.el7.x86_64.rpm

Red Hat Enterprise Linux ComputeNode (v. 7):

Source:
gnutls-3.3.26-9.el7.src.rpm

x86_64:
gnutls-3.3.26-9.el7.i686.rpm
gnutls-3.3.26-9.el7.x86_64.rpm
gnutls-dane-3.3.26-9.el7.i686.rpm
gnutls-dane-3.3.26-9.el7.x86_64.rpm
gnutls-debuginfo-3.3.26-9.el7.i686.rpm
gnutls-debuginfo-3.3.26-9.el7.x86_64.rpm
gnutls-utils-3.3.26-9.el7.x86_64.rpm

Red Hat Enterprise Linux ComputeNode Optional (v. 7):

x86_64:
gnutls-c++-3.3.26-9.el7.i686.rpm
gnutls-c++-3.3.26-9.el7.x86_64.rpm
gnutls-debuginfo-3.3.26-9.el7.i686.rpm
gnutls-debuginfo-3.3.26-9.el7.x86_64.rpm
gnutls-devel-3.3.26-9.el7.i686.rpm
gnutls-devel-3.3.26-9.el7.x86_64.rpm

Red Hat Enterprise Linux Server (v. 7):

Source:
gnutls-3.3.26-9.el7.src.rpm

aarch64:
gnutls-3.3.26-9.el7.aarch64.rpm
gnutls-c++-3.3.26-9.el7.aarch64.rpm
gnutls-dane-3.3.26-9.el7.aarch64.rpm
gnutls-debuginfo-3.3.26-9.el7.aarch64.rpm
gnutls-devel-3.3.26-9.el7.aarch64.rpm
gnutls-utils-3.3.26-9.el7.aarch64.rpm

ppc64:
gnutls-3.3.26-9.el7.ppc.rpm
gnutls-3.3.26-9.el7.ppc64.rpm
gnutls-c++-3.3.26-9.el7.ppc.rpm
gnutls-c++-3.3.26-9.el7.ppc64.rpm
gnutls-dane-3.3.26-9.el7.ppc.rpm
gnutls-dane-3.3.26-9.el7.ppc64.rpm
gnutls-debuginfo-3.3.26-9.el7.ppc.rpm
gnutls-debuginfo-3.3.26-9.el7.ppc64.rpm
gnutls-devel-3.3.26-9.el7.ppc.rpm
gnutls-devel-3.3.26-9.el7.ppc64.rpm
gnutls-utils-3.3.26-9.el7.ppc64.rpm

ppc64le:
gnutls-3.3.26-9.el7.ppc64le.rpm
gnutls-c++-3.3.26-9.el7.ppc64le.rpm
gnutls-dane-3.3.26-9.el7.ppc64le.rpm
gnutls-debuginfo-3.3.26-9.el7.ppc64le.rpm
gnutls-devel-3.3.26-9.el7.ppc64le.rpm
gnutls-utils-3.3.26-9.el7.ppc64le.rpm

s390x:
gnutls-3.3.26-9.el7.s390.rpm
gnutls-3.3.26-9.el7.s390x.rpm
gnutls-c++-3.3.26-9.el7.s390.rpm
gnutls-c++-3.3.26-9.el7.s390x.rpm
gnutls-dane-3.3.26-9.el7.s390.rpm
gnutls-dane-3.3.26-9.el7.s390x.rpm
gnutls-debuginfo-3.3.26-9.el7.s390.rpm
gnutls-debuginfo-3.3.26-9.el7.s390x.rpm
gnutls-devel-3.3.26-9.el7.s390.rpm
gnutls-devel-3.3.26-9.el7.s390x.rpm
gnutls-utils-3.3.26-9.el7.s390x.rpm

x86_64:
gnutls-3.3.26-9.el7.i686.rpm
gnutls-3.3.26-9.el7.x86_64.rpm
gnutls-c++-3.3.26-9.el7.i686.rpm
gnutls-c++-3.3.26-9.el7.x86_64.rpm
gnutls-dane-3.3.26-9.el7.i686.rpm
gnutls-dane-3.3.26-9.el7.x86_64.rpm
gnutls-debuginfo-3.3.26-9.el7.i686.rpm
gnutls-debuginfo-3.3.26-9.el7.x86_64.rpm
gnutls-devel-3.3.26-9.el7.i686.rpm
gnutls-devel-3.3.26-9.el7.x86_64.rpm
gnutls-utils-3.3.26-9.el7.x86_64.rpm

Red Hat Enterprise Linux Workstation (v. 7):

Source:
gnutls-3.3.26-9.el7.src.rpm

x86_64:
gnutls-3.3.26-9.el7.i686.rpm
gnutls-3.3.26-9.el7.x86_64.rpm
gnutls-c++-3.3.26-9.el7.i686.rpm
gnutls-c++-3.3.26-9.el7.x86_64.rpm
gnutls-dane-3.3.26-9.el7.i686.rpm
gnutls-dane-3.3.26-9.el7.x86_64.rpm
gnutls-debuginfo-3.3.26-9.el7.i686.rpm
gnutls-debuginfo-3.3.26-9.el7.x86_64.rpm
gnutls-devel-3.3.26-9.el7.i686.rpm
gnutls-devel-3.3.26-9.el7.x86_64.rpm
gnutls-utils-3.3.26-9.el7.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/

7. References:

https://access.redhat.com/security/cve/CVE-2016-7444
https://access.redhat.com/security/cve/CVE-2017-5334
https://access.redhat.com/security/cve/CVE-2017-5335
https://access.redhat.com/security/cve/CVE-2017-5336
https://access.redhat.com/security/cve/CVE-2017-5337
https://access.redhat.com/security/cve/CVE-2017-7507
https://access.redhat.com/security/cve/CVE-2017-7869
https://access.redhat.com/security/updates/classification/#moderate
https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/7/html/7.4_Release_Notes/index.html

8. Contact:

The Red Hat security contact is <secalert@redhat.com>. More contact
details at https://access.redhat.com/security/team/contact/

Copyright 2017 Red Hat, Inc.
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