news 28 Posted February 6, 2017 -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 ===================================================================== Red Hat Security Advisory Synopsis: Moderate: ntp security update Advisory ID: RHSA-2017:0252-01 Product: Red Hat Enterprise Linux Advisory URL: https://rhn.redhat.com/errata/RHSA-2017-0252.html Issue date: 2017-02-06 CVE Names: CVE-2016-7426 CVE-2016-7429 CVE-2016-7433 CVE-2016-9310 CVE-2016-9311 ===================================================================== 1. Summary: An update for ntp is now available for Red Hat Enterprise Linux 6 and 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) - noarch, x86_64 Red Hat Enterprise Linux ComputeNode (v. 7) - x86_64 Red Hat Enterprise Linux ComputeNode Optional (v. 7) - noarch, x86_64 Red Hat Enterprise Linux Desktop (v. 6) - i386, x86_64 Red Hat Enterprise Linux Desktop Optional (v. 6) - i386, noarch, x86_64 Red Hat Enterprise Linux HPC Node (v. 6) - x86_64 Red Hat Enterprise Linux HPC Node Optional (v. 6) - noarch, x86_64 Red Hat Enterprise Linux Server (v. 6) - i386, ppc64, s390x, x86_64 Red Hat Enterprise Linux Server (v. 7) - aarch64, ppc64, ppc64le, s390x, x86_64 Red Hat Enterprise Linux Server Optional (v. 6) - i386, noarch, ppc64, s390x, x86_64 Red Hat Enterprise Linux Server Optional (v. 7) - aarch64, noarch, ppc64, ppc64le, s390x, x86_64 Red Hat Enterprise Linux Workstation (v. 6) - i386, x86_64 Red Hat Enterprise Linux Workstation (v. 7) - x86_64 Red Hat Enterprise Linux Workstation Optional (v. 6) - i386, noarch, x86_64 Red Hat Enterprise Linux Workstation Optional (v. 7) - noarch, x86_64 3. Description: The Network Time Protocol (NTP) is used to synchronize a computer's time with another referenced time source. These packages include the ntpd service which continuously adjusts system time and utilities used to query and configure the ntpd service. Security Fix(es): * It was found that when ntp is configured with rate limiting for all associations the limits are also applied to responses received from its configured sources. A remote attacker who knows the sources can cause a denial of service by preventing ntpd from accepting valid responses from its sources. (CVE-2016-7426) * A flaw was found in the control mode functionality of ntpd. A remote attacker could send a crafted control mode packet which could lead to information disclosure or result in DDoS amplification attacks. (CVE-2016-9310) * A flaw was found in the way ntpd implemented the trap service. A remote attacker could send a specially crafted packet to cause a null pointer dereference that will crash ntpd, resulting in a denial of service. (CVE-2016-9311) * A flaw was found in the way ntpd running on a host with multiple network interfaces handled certain server responses. A remote attacker could use this flaw which would cause ntpd to not synchronize with the source. (CVE-2016-7429) * A flaw was found in the way ntpd calculated the root delay. A remote attacker could send a specially-crafted spoofed packet to cause denial of service or in some special cases even crash. (CVE-2016-7433) 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 After installing this update, the ntpd daemon will restart automatically. 5. Bugs fixed (https://bugzilla.redhat.com/): 1397319 - CVE-2016-9310 ntp: Mode 6 unauthenticated trap information disclosure and DDoS vector 1397341 - CVE-2016-7429 ntp: Attack on interface selection 1397345 - CVE-2016-7426 ntp: Client rate limiting and server responses 1397347 - CVE-2016-7433 ntp: Broken initial sync calculations regression 1398350 - CVE-2016-9311 ntp: Null pointer dereference when trap service is enabled 6. Package List: Red Hat Enterprise Linux Desktop (v. 6): Source: ntp-4.2.6p5-10.el6_8.2.src.rpm i386: ntp-4.2.6p5-10.el6_8.2.i686.rpm ntp-debuginfo-4.2.6p5-10.el6_8.2.i686.rpm ntpdate-4.2.6p5-10.el6_8.2.i686.rpm x86_64: ntp-4.2.6p5-10.el6_8.2.x86_64.rpm ntp-debuginfo-4.2.6p5-10.el6_8.2.x86_64.rpm ntpdate-4.2.6p5-10.el6_8.2.x86_64.rpm Red Hat Enterprise Linux Desktop Optional (v. 6): i386: ntp-debuginfo-4.2.6p5-10.el6_8.2.i686.rpm ntp-perl-4.2.6p5-10.el6_8.2.i686.rpm noarch: ntp-doc-4.2.6p5-10.el6_8.2.noarch.rpm x86_64: ntp-debuginfo-4.2.6p5-10.el6_8.2.x86_64.rpm ntp-perl-4.2.6p5-10.el6_8.2.x86_64.rpm Red Hat Enterprise Linux HPC Node (v. 6): Source: ntp-4.2.6p5-10.el6_8.2.src.rpm x86_64: ntp-4.2.6p5-10.el6_8.2.x86_64.rpm ntp-debuginfo-4.2.6p5-10.el6_8.2.x86_64.rpm ntpdate-4.2.6p5-10.el6_8.2.x86_64.rpm Red Hat Enterprise Linux HPC Node Optional (v. 6): noarch: ntp-doc-4.2.6p5-10.el6_8.2.noarch.rpm x86_64: ntp-debuginfo-4.2.6p5-10.el6_8.2.x86_64.rpm ntp-perl-4.2.6p5-10.el6_8.2.x86_64.rpm Red Hat Enterprise Linux Server (v. 6): Source: ntp-4.2.6p5-10.el6_8.2.src.rpm i386: ntp-4.2.6p5-10.el6_8.2.i686.rpm ntp-debuginfo-4.2.6p5-10.el6_8.2.i686.rpm ntpdate-4.2.6p5-10.el6_8.2.i686.rpm ppc64: ntp-4.2.6p5-10.el6_8.2.ppc64.rpm ntp-debuginfo-4.2.6p5-10.el6_8.2.ppc64.rpm ntpdate-4.2.6p5-10.el6_8.2.ppc64.rpm s390x: ntp-4.2.6p5-10.el6_8.2.s390x.rpm ntp-debuginfo-4.2.6p5-10.el6_8.2.s390x.rpm ntpdate-4.2.6p5-10.el6_8.2.s390x.rpm x86_64: ntp-4.2.6p5-10.el6_8.2.x86_64.rpm ntp-debuginfo-4.2.6p5-10.el6_8.2.x86_64.rpm ntpdate-4.2.6p5-10.el6_8.2.x86_64.rpm Red Hat Enterprise Linux Server Optional (v. 6): i386: ntp-debuginfo-4.2.6p5-10.el6_8.2.i686.rpm ntp-perl-4.2.6p5-10.el6_8.2.i686.rpm noarch: ntp-doc-4.2.6p5-10.el6_8.2.noarch.rpm ppc64: ntp-debuginfo-4.2.6p5-10.el6_8.2.ppc64.rpm ntp-perl-4.2.6p5-10.el6_8.2.ppc64.rpm s390x: ntp-debuginfo-4.2.6p5-10.el6_8.2.s390x.rpm ntp-perl-4.2.6p5-10.el6_8.2.s390x.rpm x86_64: ntp-debuginfo-4.2.6p5-10.el6_8.2.x86_64.rpm ntp-perl-4.2.6p5-10.el6_8.2.x86_64.rpm Red Hat Enterprise Linux Workstation (v. 6): Source: ntp-4.2.6p5-10.el6_8.2.src.rpm i386: ntp-4.2.6p5-10.el6_8.2.i686.rpm ntp-debuginfo-4.2.6p5-10.el6_8.2.i686.rpm ntpdate-4.2.6p5-10.el6_8.2.i686.rpm x86_64: ntp-4.2.6p5-10.el6_8.2.x86_64.rpm ntp-debuginfo-4.2.6p5-10.el6_8.2.x86_64.rpm ntpdate-4.2.6p5-10.el6_8.2.x86_64.rpm Red Hat Enterprise Linux Workstation Optional (v. 6): i386: ntp-debuginfo-4.2.6p5-10.el6_8.2.i686.rpm ntp-perl-4.2.6p5-10.el6_8.2.i686.rpm noarch: ntp-doc-4.2.6p5-10.el6_8.2.noarch.rpm x86_64: ntp-debuginfo-4.2.6p5-10.el6_8.2.x86_64.rpm ntp-perl-4.2.6p5-10.el6_8.2.x86_64.rpm Red Hat Enterprise Linux Client (v. 7): Source: ntp-4.2.6p5-25.el7_3.1.src.rpm x86_64: ntp-4.2.6p5-25.el7_3.1.x86_64.rpm ntp-debuginfo-4.2.6p5-25.el7_3.1.x86_64.rpm ntpdate-4.2.6p5-25.el7_3.1.x86_64.rpm Red Hat Enterprise Linux Client Optional (v. 7): noarch: ntp-doc-4.2.6p5-25.el7_3.1.noarch.rpm ntp-perl-4.2.6p5-25.el7_3.1.noarch.rpm x86_64: ntp-debuginfo-4.2.6p5-25.el7_3.1.x86_64.rpm sntp-4.2.6p5-25.el7_3.1.x86_64.rpm Red Hat Enterprise Linux ComputeNode (v. 7): Source: ntp-4.2.6p5-25.el7_3.1.src.rpm x86_64: ntp-4.2.6p5-25.el7_3.1.x86_64.rpm ntp-debuginfo-4.2.6p5-25.el7_3.1.x86_64.rpm ntpdate-4.2.6p5-25.el7_3.1.x86_64.rpm Red Hat Enterprise Linux ComputeNode Optional (v. 7): noarch: ntp-doc-4.2.6p5-25.el7_3.1.noarch.rpm ntp-perl-4.2.6p5-25.el7_3.1.noarch.rpm x86_64: ntp-debuginfo-4.2.6p5-25.el7_3.1.x86_64.rpm sntp-4.2.6p5-25.el7_3.1.x86_64.rpm Red Hat Enterprise Linux Server (v. 7): Source: ntp-4.2.6p5-25.el7_3.1.src.rpm aarch64: ntp-4.2.6p5-25.el7_3.1.aarch64.rpm ntp-debuginfo-4.2.6p5-25.el7_3.1.aarch64.rpm ntpdate-4.2.6p5-25.el7_3.1.aarch64.rpm ppc64: ntp-4.2.6p5-25.el7_3.1.ppc64.rpm ntp-debuginfo-4.2.6p5-25.el7_3.1.ppc64.rpm ntpdate-4.2.6p5-25.el7_3.1.ppc64.rpm ppc64le: ntp-4.2.6p5-25.el7_3.1.ppc64le.rpm ntp-debuginfo-4.2.6p5-25.el7_3.1.ppc64le.rpm ntpdate-4.2.6p5-25.el7_3.1.ppc64le.rpm s390x: ntp-4.2.6p5-25.el7_3.1.s390x.rpm ntp-debuginfo-4.2.6p5-25.el7_3.1.s390x.rpm ntpdate-4.2.6p5-25.el7_3.1.s390x.rpm x86_64: ntp-4.2.6p5-25.el7_3.1.x86_64.rpm ntp-debuginfo-4.2.6p5-25.el7_3.1.x86_64.rpm ntpdate-4.2.6p5-25.el7_3.1.x86_64.rpm Red Hat Enterprise Linux Server Optional (v. 7): aarch64: ntp-debuginfo-4.2.6p5-25.el7_3.1.aarch64.rpm sntp-4.2.6p5-25.el7_3.1.aarch64.rpm noarch: ntp-doc-4.2.6p5-25.el7_3.1.noarch.rpm ntp-perl-4.2.6p5-25.el7_3.1.noarch.rpm ppc64: ntp-debuginfo-4.2.6p5-25.el7_3.1.ppc64.rpm sntp-4.2.6p5-25.el7_3.1.ppc64.rpm ppc64le: ntp-debuginfo-4.2.6p5-25.el7_3.1.ppc64le.rpm sntp-4.2.6p5-25.el7_3.1.ppc64le.rpm s390x: ntp-debuginfo-4.2.6p5-25.el7_3.1.s390x.rpm sntp-4.2.6p5-25.el7_3.1.s390x.rpm x86_64: ntp-debuginfo-4.2.6p5-25.el7_3.1.x86_64.rpm sntp-4.2.6p5-25.el7_3.1.x86_64.rpm Red Hat Enterprise Linux Workstation (v. 7): Source: ntp-4.2.6p5-25.el7_3.1.src.rpm x86_64: ntp-4.2.6p5-25.el7_3.1.x86_64.rpm ntp-debuginfo-4.2.6p5-25.el7_3.1.x86_64.rpm ntpdate-4.2.6p5-25.el7_3.1.x86_64.rpm Red Hat Enterprise Linux Workstation Optional (v. 7): noarch: ntp-doc-4.2.6p5-25.el7_3.1.noarch.rpm ntp-perl-4.2.6p5-25.el7_3.1.noarch.rpm x86_64: ntp-debuginfo-4.2.6p5-25.el7_3.1.x86_64.rpm sntp-4.2.6p5-25.el7_3.1.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-2016-7426 https://access.redhat.com/security/cve/CVE-2016-7429 https://access.redhat.com/security/cve/CVE-2016-7433 https://access.redhat.com/security/cve/CVE-2016-9310 https://access.redhat.com/security/cve/CVE-2016-9311 https://access.redhat.com/security/updates/classification/#moderate 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 iD8DBQFYmBasXlSAg2UNWIIRAtaKAKCm2dAxAx1w4jCUz0puJyIXXpuaeQCgtbPU QI1oAu3rHY96U/5WIC/xF4g= =qaRk -----END PGP SIGNATURE----- -- Share this post Link to post
