-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 ===================================================================== Red Hat Security Advisory Synopsis: Moderate: gnutls security, bug fix, and enhancement update Advisory ID: RHSA-2017:0574-01 Product: Red Hat Enterprise Linux Advisory URL: https://rhn.redhat.com/errata/RHSA-2017-0574.html Issue date: 2017-03-21 CVE Names: CVE-2016-8610 CVE-2017-5335 CVE-2017-5336 CVE-2017-5337 ===================================================================== 1. Summary: An update for gnutls is now available for Red Hat Enterprise Linux 6. 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 Desktop (v. 6) - i386, x86_64 Red Hat Enterprise Linux Desktop Optional (v. 6) - i386, x86_64 Red Hat Enterprise Linux HPC Node (v. 6) - x86_64 Red Hat Enterprise Linux HPC Node Optional (v. 6) - x86_64 Red Hat Enterprise Linux Server (v. 6) - i386, ppc64, s390x, x86_64 Red Hat Enterprise Linux Server Optional (v. 6) - i386, ppc64, s390x, x86_64 Red Hat Enterprise Linux Workstation (v. 6) - i386, x86_64 Red Hat Enterprise Linux Workstation Optional (v. 6) - i386, 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 (2.12.23). (BZ#1321112, BZ#1326073, BZ#1415682, BZ#1326389) Security Fix(es): * A denial of service flaw was found in the way the TLS/SSL protocol defined processing of ALERT packets during a connection handshake. A remote attacker could use this flaw to make a TLS/SSL server consume an excessive amount of CPU and fail to accept connections form other clients. (CVE-2016-8610) * 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) Additional Changes: For detailed information on changes in this release, see the Red Hat Enterprise Linux 6.9 Release Notes and Red Hat Enterprise Linux 6.9 Technical 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/): 1320982 - ASSERT failure in gnutls-cli-debug 1321112 - DHE_DSS ciphers don't work with client certificates and OpenSSL using TLSv1.2 1323215 - gnutls-serv --http crashes with client certificates with NSS client 1326073 - GnuTLS prefers SHA-1 signatures in TLSv1.2 1326389 - GnuTLS server does not accept SHA-384 and SHA-512 Certificate Verify signatures despite advertising support for them 1326886 - GnuTLS server rejects connections that do not advertise support for SHA-1 signature algorithms 1327656 - gnutls-serv: closing connection without sending an Alert message 1328205 - gnutls-cli won't send certificates that don't match hashes in Certificate Request 1333521 - Provide ability to set the expected server name in gnutls-serv utility 1335924 - gnutls: Disable TLS connections with less than 1024-bit DH parameters 1337460 - Disable/remove export ciphersuites in GnuTLS 1384743 - CVE-2016-8610 SSL/TLS: Malformed plain-text ALERT packets could cause remote DoS 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 1415682 - Changes introduced by rebase to 2.12.23 break API and ABI compatibility for some libraries 6. Package List: Red Hat Enterprise Linux Desktop (v. 6): Source: gnutls-2.12.23-21.el6.src.rpm i386: gnutls-2.12.23-21.el6.i686.rpm gnutls-debuginfo-2.12.23-21.el6.i686.rpm gnutls-utils-2.12.23-21.el6.i686.rpm x86_64: gnutls-2.12.23-21.el6.i686.rpm gnutls-2.12.23-21.el6.x86_64.rpm gnutls-debuginfo-2.12.23-21.el6.i686.rpm gnutls-debuginfo-2.12.23-21.el6.x86_64.rpm gnutls-utils-2.12.23-21.el6.x86_64.rpm Red Hat Enterprise Linux Desktop Optional (v. 6): i386: gnutls-debuginfo-2.12.23-21.el6.i686.rpm gnutls-devel-2.12.23-21.el6.i686.rpm gnutls-guile-2.12.23-21.el6.i686.rpm x86_64: gnutls-debuginfo-2.12.23-21.el6.i686.rpm gnutls-debuginfo-2.12.23-21.el6.x86_64.rpm gnutls-devel-2.12.23-21.el6.i686.rpm gnutls-devel-2.12.23-21.el6.x86_64.rpm gnutls-guile-2.12.23-21.el6.i686.rpm gnutls-guile-2.12.23-21.el6.x86_64.rpm Red Hat Enterprise Linux HPC Node (v. 6): Source: gnutls-2.12.23-21.el6.src.rpm x86_64: gnutls-2.12.23-21.el6.i686.rpm gnutls-2.12.23-21.el6.x86_64.rpm gnutls-debuginfo-2.12.23-21.el6.i686.rpm gnutls-debuginfo-2.12.23-21.el6.x86_64.rpm gnutls-utils-2.12.23-21.el6.x86_64.rpm Red Hat Enterprise Linux HPC Node Optional (v. 6): x86_64: gnutls-debuginfo-2.12.23-21.el6.i686.rpm gnutls-debuginfo-2.12.23-21.el6.x86_64.rpm gnutls-devel-2.12.23-21.el6.i686.rpm gnutls-devel-2.12.23-21.el6.x86_64.rpm gnutls-guile-2.12.23-21.el6.i686.rpm gnutls-guile-2.12.23-21.el6.x86_64.rpm Red Hat Enterprise Linux Server (v. 6): Source: gnutls-2.12.23-21.el6.src.rpm i386: gnutls-2.12.23-21.el6.i686.rpm gnutls-debuginfo-2.12.23-21.el6.i686.rpm gnutls-devel-2.12.23-21.el6.i686.rpm gnutls-utils-2.12.23-21.el6.i686.rpm ppc64: gnutls-2.12.23-21.el6.ppc.rpm gnutls-2.12.23-21.el6.ppc64.rpm gnutls-debuginfo-2.12.23-21.el6.ppc.rpm gnutls-debuginfo-2.12.23-21.el6.ppc64.rpm gnutls-devel-2.12.23-21.el6.ppc.rpm gnutls-devel-2.12.23-21.el6.ppc64.rpm gnutls-utils-2.12.23-21.el6.ppc64.rpm s390x: gnutls-2.12.23-21.el6.s390.rpm gnutls-2.12.23-21.el6.s390x.rpm gnutls-debuginfo-2.12.23-21.el6.s390.rpm gnutls-debuginfo-2.12.23-21.el6.s390x.rpm gnutls-devel-2.12.23-21.el6.s390.rpm gnutls-devel-2.12.23-21.el6.s390x.rpm gnutls-utils-2.12.23-21.el6.s390x.rpm x86_64: gnutls-2.12.23-21.el6.i686.rpm gnutls-2.12.23-21.el6.x86_64.rpm gnutls-debuginfo-2.12.23-21.el6.i686.rpm gnutls-debuginfo-2.12.23-21.el6.x86_64.rpm gnutls-devel-2.12.23-21.el6.i686.rpm gnutls-devel-2.12.23-21.el6.x86_64.rpm gnutls-utils-2.12.23-21.el6.x86_64.rpm Red Hat Enterprise Linux Server Optional (v. 6): i386: gnutls-debuginfo-2.12.23-21.el6.i686.rpm gnutls-guile-2.12.23-21.el6.i686.rpm ppc64: gnutls-debuginfo-2.12.23-21.el6.ppc.rpm gnutls-debuginfo-2.12.23-21.el6.ppc64.rpm gnutls-guile-2.12.23-21.el6.ppc.rpm gnutls-guile-2.12.23-21.el6.ppc64.rpm s390x: gnutls-debuginfo-2.12.23-21.el6.s390.rpm gnutls-debuginfo-2.12.23-21.el6.s390x.rpm gnutls-guile-2.12.23-21.el6.s390.rpm gnutls-guile-2.12.23-21.el6.s390x.rpm x86_64: gnutls-debuginfo-2.12.23-21.el6.i686.rpm gnutls-debuginfo-2.12.23-21.el6.x86_64.rpm gnutls-guile-2.12.23-21.el6.i686.rpm gnutls-guile-2.12.23-21.el6.x86_64.rpm Red Hat Enterprise Linux Workstation (v. 6): Source: gnutls-2.12.23-21.el6.src.rpm i386: gnutls-2.12.23-21.el6.i686.rpm gnutls-debuginfo-2.12.23-21.el6.i686.rpm gnutls-devel-2.12.23-21.el6.i686.rpm gnutls-utils-2.12.23-21.el6.i686.rpm x86_64: gnutls-2.12.23-21.el6.i686.rpm gnutls-2.12.23-21.el6.x86_64.rpm gnutls-debuginfo-2.12.23-21.el6.i686.rpm gnutls-debuginfo-2.12.23-21.el6.x86_64.rpm gnutls-devel-2.12.23-21.el6.i686.rpm gnutls-devel-2.12.23-21.el6.x86_64.rpm gnutls-utils-2.12.23-21.el6.x86_64.rpm Red Hat Enterprise Linux Workstation Optional (v. 6): i386: gnutls-debuginfo-2.12.23-21.el6.i686.rpm gnutls-guile-2.12.23-21.el6.i686.rpm x86_64: gnutls-debuginfo-2.12.23-21.el6.i686.rpm gnutls-debuginfo-2.12.23-21.el6.x86_64.rpm gnutls-guile-2.12.23-21.el6.i686.rpm gnutls-guile-2.12.23-21.el6.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-2016-8610 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/updates/classification/#moderate https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/6/html/6.9_Release_Notes/index.html https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/6/html/6.9_Technical_Notes/index.html 8. Contact: The Red Hat security contact is . More contact details at https://access.redhat.com/security/team/contact/ Copyright 2017 Red Hat, Inc. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iD8DBQFY0POlXlSAg2UNWIIRAhsCAJ0f16s1qzndcPHdUSHLmbQGvbQvcACggquH 8b1zEPEmPqMh/S/pZTQy6OE= =e+1d -----END PGP SIGNATURE----- -- RHSA-announce mailing list RHSA-announce@redhat.com https://www.redhat.com/mailman/listinfo/rhsa-announce