ID

VAR-201701-1135

CVE

CVE-2015-8138

TITLE

NTP.org ntpd contains multiple vulnerabilities

DESCRIPTION

NTP before 4.2.8p6 and 4.3.x before 4.3.90 allows remote attackers to bypass the origin timestamp validation via a packet with an origin timestamp set to zero. The NTP.org reference implementation of ntpd contains multiple vulnerabilities. NTP is prone to a denial-of-service vulnerability. Successful exploits may allow the attacker to cause a denial-of-service condition. ========================================================================== Ubuntu Security Notice USN-3096-1 October 05, 2016 ntp vulnerabilities ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 16.04 LTS - Ubuntu 14.04 LTS - Ubuntu 12.04 LTS Summary: Several security issues were fixed in NTP. A remote attacker could use this issue to perform a replay attack. (CVE-2015-7973) Matt Street discovered that NTP incorrectly verified peer associations of symmetric keys. A remote attacker could use this issue to perform an impersonation attack. (CVE-2015-7974) Jonathan Gardner discovered that the NTP ntpq utility incorrectly handled memory. This issue only affected Ubuntu 16.04 LTS. An attacker could possibly use this issue to overwrite arbitrary files. (CVE-2015-7976) Stephen Gray discovered that NTP incorrectly handled large restrict lists. A remote attacker could use this issue to spoof peer servers. (CVE-2015-8138) Jonathan Gardner discovered that the NTP ntpq utility did not properly handle certain incorrect values. (CVE-2015-8158) It was discovered that the NTP cronjob incorrectly cleaned up the statistics directory. A local attacker could possibly use this to escalate privileges. (CVE-2016-0727) Stephen Gray and Matthew Van Gundy discovered that NTP incorrectly validated crypto-NAKs. A remote attacker could possibly use this issue to prevent clients from synchronizing. (CVE-2016-1547) Miroslav Lichvar and Jonathan Gardner discovered that NTP incorrectly handled switching to interleaved symmetric mode. A remote attacker could possibly use this issue to prevent clients from synchronizing. (CVE-2016-1548) Matthew Van Gundy, Stephen Gray and Loganaden Velvindron discovered that NTP incorrectly handled message authentication. A remote attacker could possibly use this issue to recover the message digest key. (CVE-2016-1550) Yihan Lian discovered that NTP incorrectly handled duplicate IPs on unconfig directives. (CVE-2016-2516) Yihan Lian discovered that NTP incorrectly handled certail peer associations. A remote attacker could possibly use this issue to cause a denial of service. A remote attacker could possibly use this issue to cause a denial of service. A remote attacker could possibly use this issue to cause a denial of service. (CVE-2016-4956) In the default installation, attackers would be isolated by the NTP AppArmor profile. Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 16.04 LTS: ntp 1:4.2.8p4+dfsg-3ubuntu5.3 Ubuntu 14.04 LTS: ntp 1:4.2.6.p5+dfsg-3ubuntu2.14.04.10 Ubuntu 12.04 LTS: ntp 1:4.2.6.p3+dfsg-1ubuntu3.11 In general, a standard system update will make all the necessary changes. Here are the details from the Slackware 14.1 ChangeLog: +--------------------------+ patches/packages/ntp-4.2.8p6-i486-1_slack14.1.txz: Upgraded. In addition to bug fixes and enhancements, this release fixes several low and medium severity vulnerabilities. For more information, see: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-5300 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-7973 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-7974 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-7975 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-7976 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-7977 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-7978 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-7979 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-8138 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-8158 (* Security fix *) +--------------------------+ Where to find the new packages: +-----------------------------+ Thanks to the friendly folks at the OSU Open Source Lab (http://osuosl.org) for donating FTP and rsync hosting to the Slackware project! :-) Also see the "Get Slack" section on http://slackware.com for additional mirror sites near you. Updated package for Slackware 13.0: ftp://ftp.slackware.com/pub/slackware/slackware-13.0/patches/packages/ntp-4.2.8p6-i486-1_slack13.0.txz Updated package for Slackware x86_64 13.0: ftp://ftp.slackware.com/pub/slackware/slackware64-13.0/patches/packages/ntp-4.2.8p6-x86_64-1_slack13.0.txz Updated package for Slackware 13.1: ftp://ftp.slackware.com/pub/slackware/slackware-13.1/patches/packages/ntp-4.2.8p6-i486-1_slack13.1.txz Updated package for Slackware x86_64 13.1: ftp://ftp.slackware.com/pub/slackware/slackware64-13.1/patches/packages/ntp-4.2.8p6-x86_64-1_slack13.1.txz Updated package for Slackware 13.37: ftp://ftp.slackware.com/pub/slackware/slackware-13.37/patches/packages/ntp-4.2.8p6-i486-1_slack13.37.txz Updated package for Slackware x86_64 13.37: ftp://ftp.slackware.com/pub/slackware/slackware64-13.37/patches/packages/ntp-4.2.8p6-x86_64-1_slack13.37.txz Updated package for Slackware 14.0: ftp://ftp.slackware.com/pub/slackware/slackware-14.0/patches/packages/ntp-4.2.8p6-i486-1_slack14.0.txz Updated package for Slackware x86_64 14.0: ftp://ftp.slackware.com/pub/slackware/slackware64-14.0/patches/packages/ntp-4.2.8p6-x86_64-1_slack14.0.txz Updated package for Slackware 14.1: ftp://ftp.slackware.com/pub/slackware/slackware-14.1/patches/packages/ntp-4.2.8p6-i486-1_slack14.1.txz Updated package for Slackware x86_64 14.1: ftp://ftp.slackware.com/pub/slackware/slackware64-14.1/patches/packages/ntp-4.2.8p6-x86_64-1_slack14.1.txz Updated package for Slackware -current: ftp://ftp.slackware.com/pub/slackware/slackware-current/slackware/n/ntp-4.2.8p6-i586-1.txz Updated package for Slackware x86_64 -current: ftp://ftp.slackware.com/pub/slackware/slackware64-current/slackware64/n/ntp-4.2.8p6-x86_64-1.txz MD5 signatures: +-------------+ Slackware 13.0 package: 31365ae4f12849e65d4ad1c8c7d5f89a ntp-4.2.8p6-i486-1_slack13.0.txz Slackware x86_64 13.0 package: 5a2d24bdacd8dd05ab9e0613c829212b ntp-4.2.8p6-x86_64-1_slack13.0.txz Slackware 13.1 package: e70f7422bc81c144e6fac1df2c202634 ntp-4.2.8p6-i486-1_slack13.1.txz Slackware x86_64 13.1 package: f6637f6d24b94a6b17c68467956a6283 ntp-4.2.8p6-x86_64-1_slack13.1.txz Slackware 13.37 package: 82601e105f95e324dfd1e2f0df513673 ntp-4.2.8p6-i486-1_slack13.37.txz Slackware x86_64 13.37 package: d3ba32d46f7eef8f75a3444bbee4c677 ntp-4.2.8p6-x86_64-1_slack13.37.txz Slackware 14.0 package: c5ff13e58fbbea0b7a677e947449e7b1 ntp-4.2.8p6-i486-1_slack14.0.txz Slackware x86_64 14.0 package: 9e2abfaf0b0b7bf84a8a4db89f60eff6 ntp-4.2.8p6-x86_64-1_slack14.0.txz Slackware 14.1 package: e1e6b84808b7562314e0e29479153553 ntp-4.2.8p6-i486-1_slack14.1.txz Slackware x86_64 14.1 package: 8db0a4ca68805c7f5e487d5bcd69d098 ntp-4.2.8p6-x86_64-1_slack14.1.txz Slackware -current package: f96f443f54a74c20b5eb67467f5958ea n/ntp-4.2.8p6-i586-1.txz Slackware x86_64 -current package: 5e256f2e1906b4c75047a966996a7a41 n/ntp-4.2.8p6-x86_64-1.txz Installation instructions: +------------------------+ Upgrade the package as root: # upgradepkg ntp-4.2.8p6-i486-1_slack14.1.txz Then, restart the NTP daemon: # sh /etc/rc.d/rc.ntpd restart +-----+ Slackware Linux Security Team http://slackware.com/gpg-key security@slackware.com +------------------------------------------------------------------------+ | To leave the slackware-security mailing list: | +------------------------------------------------------------------------+ | Send an email to majordomo@slackware.com with this text in the body of | | the email message: | | | | unsubscribe slackware-security | | | | You will get a confirmation message back containing instructions to | | complete the process. Please do not reply to this email address. - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 201607-15 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - https://security.gentoo.org/ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Severity: Normal Title: NTP: Multiple vulnerabilities Date: July 20, 2016 Bugs: #563774, #572452, #581528, #584954 ID: 201607-15 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Synopsis ======== Multiple vulnerabilities have been found in NTP, the worst of which could lead to Denial of Service. Please review the CVE identifiers referenced below for details. Resolution ========== All NTP users should upgrade to the latest version: # emerge --sync # emerge --ask --oneshot --verbose ">=net-misc/ntp-4.2.8_p8" References ========== [ 1 ] CVE-2015-7691 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2015-7691 [ 2 ] CVE-2015-7692 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2015-7692 [ 3 ] CVE-2015-7701 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2015-7701 [ 4 ] CVE-2015-7702 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2015-7702 [ 5 ] CVE-2015-7703 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2015-7703 [ 6 ] CVE-2015-7704 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2015-7704 [ 7 ] CVE-2015-7705 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2015-7705 [ 8 ] CVE-2015-7848 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2015-7848 [ 9 ] CVE-2015-7849 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2015-7849 [ 10 ] CVE-2015-7850 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2015-7850 [ 11 ] CVE-2015-7851 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2015-7851 [ 12 ] CVE-2015-7852 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2015-7852 [ 13 ] CVE-2015-7853 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2015-7853 [ 14 ] CVE-2015-7854 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2015-7854 [ 15 ] CVE-2015-7855 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2015-7855 [ 16 ] CVE-2015-7871 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2015-7871 [ 17 ] CVE-2015-7973 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2015-7973 [ 18 ] CVE-2015-7974 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2015-7974 [ 19 ] CVE-2015-7975 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2015-7975 [ 20 ] CVE-2015-7976 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2015-7976 [ 21 ] CVE-2015-7977 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2015-7977 [ 22 ] CVE-2015-7978 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2015-7978 [ 23 ] CVE-2015-7979 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2015-7979 [ 24 ] CVE-2015-8138 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2015-8138 [ 25 ] CVE-2015-8139 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2015-8139 [ 26 ] CVE-2015-8140 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2015-8140 [ 27 ] CVE-2015-8158 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2015-8158 [ 28 ] CVE-2016-1547 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2016-1547 [ 29 ] CVE-2016-1548 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2016-1548 [ 30 ] CVE-2016-1549 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2016-1549 [ 31 ] CVE-2016-1550 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2016-1550 [ 32 ] CVE-2016-1551 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2016-1551 [ 33 ] CVE-2016-2516 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2016-2516 [ 34 ] CVE-2016-2517 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2016-2517 [ 35 ] CVE-2016-2518 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2016-2518 [ 36 ] CVE-2016-2519 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2016-2519 [ 37 ] CVE-2016-4953 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2016-4953 [ 38 ] CVE-2016-4954 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2016-4954 [ 39 ] CVE-2016-4955 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2016-4955 [ 40 ] CVE-2016-4956 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2016-4956 [ 41 ] CVE-2016-4957 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2016-4957 Availability ============ This GLSA and any updates to it are available for viewing at the Gentoo Security Website: https://security.gentoo.org/glsa/201607-15 Concerns? ========= Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users' machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at https://bugs.gentoo.org. License ======= Copyright 2016 Gentoo Foundation, Inc; referenced text belongs to its owner(s). The contents of this document are licensed under the Creative Commons - Attribution / Share Alike license. http://creativecommons.org/licenses/by-sa/2.5 . -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 ===================================================================== Red Hat Security Advisory Synopsis: Important: ntp security update Advisory ID: RHSA-2016:0063-01 Product: Red Hat Enterprise Linux Advisory URL: https://rhn.redhat.com/errata/RHSA-2016-0063.html Issue date: 2016-01-25 CVE Names: CVE-2015-8138 ===================================================================== 1. Summary: Updated ntp packages that fix one security issue are now available for Red Hat Enterprise Linux 6 and 7. Red Hat Product Security has rated this update as having Important security impact. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available from the CVE link 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) - 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) - 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 a referenced time source. It was discovered that ntpd as a client did not correctly check the originate timestamp in received packets. A remote attacker could use this flaw to send a crafted packet to an ntpd client that would effectively disable synchronization with the server, or push arbitrary offset/delay measurements to modify the time on the client. (CVE-2015-8138) All ntp users are advised to upgrade to these updated packages, which contain a backported patch to resolve this issue. After installing the update, the ntpd daemon will restart automatically. 4. Solution: Before applying this update, make sure all previously released errata relevant to your system have been applied. For details on how to apply this update, refer to: https://access.redhat.com/articles/11258 5. Bugs fixed (https://bugzilla.redhat.com/): 1299442 - CVE-2015-8138 ntp: missing check for zero originate timestamp 6. Package List: Red Hat Enterprise Linux Desktop (v. 6): Source: ntp-4.2.6p5-5.el6_7.4.src.rpm i386: ntp-4.2.6p5-5.el6_7.4.i686.rpm ntp-debuginfo-4.2.6p5-5.el6_7.4.i686.rpm ntpdate-4.2.6p5-5.el6_7.4.i686.rpm x86_64: ntp-4.2.6p5-5.el6_7.4.x86_64.rpm ntp-debuginfo-4.2.6p5-5.el6_7.4.x86_64.rpm ntpdate-4.2.6p5-5.el6_7.4.x86_64.rpm Red Hat Enterprise Linux Desktop Optional (v. 6): i386: ntp-debuginfo-4.2.6p5-5.el6_7.4.i686.rpm ntp-perl-4.2.6p5-5.el6_7.4.i686.rpm noarch: ntp-doc-4.2.6p5-5.el6_7.4.noarch.rpm x86_64: ntp-debuginfo-4.2.6p5-5.el6_7.4.x86_64.rpm ntp-perl-4.2.6p5-5.el6_7.4.x86_64.rpm Red Hat Enterprise Linux HPC Node (v. 6): Source: ntp-4.2.6p5-5.el6_7.4.src.rpm x86_64: ntp-4.2.6p5-5.el6_7.4.x86_64.rpm ntp-debuginfo-4.2.6p5-5.el6_7.4.x86_64.rpm ntpdate-4.2.6p5-5.el6_7.4.x86_64.rpm Red Hat Enterprise Linux HPC Node Optional (v. 6): noarch: ntp-doc-4.2.6p5-5.el6_7.4.noarch.rpm x86_64: ntp-debuginfo-4.2.6p5-5.el6_7.4.x86_64.rpm ntp-perl-4.2.6p5-5.el6_7.4.x86_64.rpm Red Hat Enterprise Linux Server (v. 6): Source: ntp-4.2.6p5-5.el6_7.4.src.rpm i386: ntp-4.2.6p5-5.el6_7.4.i686.rpm ntp-debuginfo-4.2.6p5-5.el6_7.4.i686.rpm ntpdate-4.2.6p5-5.el6_7.4.i686.rpm ppc64: ntp-4.2.6p5-5.el6_7.4.ppc64.rpm ntp-debuginfo-4.2.6p5-5.el6_7.4.ppc64.rpm ntpdate-4.2.6p5-5.el6_7.4.ppc64.rpm s390x: ntp-4.2.6p5-5.el6_7.4.s390x.rpm ntp-debuginfo-4.2.6p5-5.el6_7.4.s390x.rpm ntpdate-4.2.6p5-5.el6_7.4.s390x.rpm x86_64: ntp-4.2.6p5-5.el6_7.4.x86_64.rpm ntp-debuginfo-4.2.6p5-5.el6_7.4.x86_64.rpm ntpdate-4.2.6p5-5.el6_7.4.x86_64.rpm Red Hat Enterprise Linux Server Optional (v. 6): i386: ntp-debuginfo-4.2.6p5-5.el6_7.4.i686.rpm ntp-perl-4.2.6p5-5.el6_7.4.i686.rpm noarch: ntp-doc-4.2.6p5-5.el6_7.4.noarch.rpm ppc64: ntp-debuginfo-4.2.6p5-5.el6_7.4.ppc64.rpm ntp-perl-4.2.6p5-5.el6_7.4.ppc64.rpm s390x: ntp-debuginfo-4.2.6p5-5.el6_7.4.s390x.rpm ntp-perl-4.2.6p5-5.el6_7.4.s390x.rpm x86_64: ntp-debuginfo-4.2.6p5-5.el6_7.4.x86_64.rpm ntp-perl-4.2.6p5-5.el6_7.4.x86_64.rpm Red Hat Enterprise Linux Workstation (v. 6): Source: ntp-4.2.6p5-5.el6_7.4.src.rpm i386: ntp-4.2.6p5-5.el6_7.4.i686.rpm ntp-debuginfo-4.2.6p5-5.el6_7.4.i686.rpm ntpdate-4.2.6p5-5.el6_7.4.i686.rpm x86_64: ntp-4.2.6p5-5.el6_7.4.x86_64.rpm ntp-debuginfo-4.2.6p5-5.el6_7.4.x86_64.rpm ntpdate-4.2.6p5-5.el6_7.4.x86_64.rpm Red Hat Enterprise Linux Workstation Optional (v. 6): i386: ntp-debuginfo-4.2.6p5-5.el6_7.4.i686.rpm ntp-perl-4.2.6p5-5.el6_7.4.i686.rpm noarch: ntp-doc-4.2.6p5-5.el6_7.4.noarch.rpm x86_64: ntp-debuginfo-4.2.6p5-5.el6_7.4.x86_64.rpm ntp-perl-4.2.6p5-5.el6_7.4.x86_64.rpm Red Hat Enterprise Linux Client (v. 7): Source: ntp-4.2.6p5-22.el7_2.1.src.rpm x86_64: ntp-4.2.6p5-22.el7_2.1.x86_64.rpm ntp-debuginfo-4.2.6p5-22.el7_2.1.x86_64.rpm ntpdate-4.2.6p5-22.el7_2.1.x86_64.rpm Red Hat Enterprise Linux Client Optional (v. 7): noarch: ntp-doc-4.2.6p5-22.el7_2.1.noarch.rpm ntp-perl-4.2.6p5-22.el7_2.1.noarch.rpm x86_64: ntp-debuginfo-4.2.6p5-22.el7_2.1.x86_64.rpm sntp-4.2.6p5-22.el7_2.1.x86_64.rpm Red Hat Enterprise Linux ComputeNode (v. 7): Source: ntp-4.2.6p5-22.el7_2.1.src.rpm x86_64: ntp-4.2.6p5-22.el7_2.1.x86_64.rpm ntp-debuginfo-4.2.6p5-22.el7_2.1.x86_64.rpm ntpdate-4.2.6p5-22.el7_2.1.x86_64.rpm Red Hat Enterprise Linux ComputeNode Optional (v. 7): noarch: ntp-doc-4.2.6p5-22.el7_2.1.noarch.rpm ntp-perl-4.2.6p5-22.el7_2.1.noarch.rpm x86_64: ntp-debuginfo-4.2.6p5-22.el7_2.1.x86_64.rpm sntp-4.2.6p5-22.el7_2.1.x86_64.rpm Red Hat Enterprise Linux Server (v. 7): Source: ntp-4.2.6p5-22.el7_2.1.src.rpm ppc64: ntp-4.2.6p5-22.el7_2.1.ppc64.rpm ntp-debuginfo-4.2.6p5-22.el7_2.1.ppc64.rpm ntpdate-4.2.6p5-22.el7_2.1.ppc64.rpm ppc64le: ntp-4.2.6p5-22.el7_2.1.ppc64le.rpm ntp-debuginfo-4.2.6p5-22.el7_2.1.ppc64le.rpm ntpdate-4.2.6p5-22.el7_2.1.ppc64le.rpm s390x: ntp-4.2.6p5-22.el7_2.1.s390x.rpm ntp-debuginfo-4.2.6p5-22.el7_2.1.s390x.rpm ntpdate-4.2.6p5-22.el7_2.1.s390x.rpm x86_64: ntp-4.2.6p5-22.el7_2.1.x86_64.rpm ntp-debuginfo-4.2.6p5-22.el7_2.1.x86_64.rpm ntpdate-4.2.6p5-22.el7_2.1.x86_64.rpm Red Hat Enterprise Linux Server Optional (v. 7): noarch: ntp-doc-4.2.6p5-22.el7_2.1.noarch.rpm ntp-perl-4.2.6p5-22.el7_2.1.noarch.rpm ppc64: ntp-debuginfo-4.2.6p5-22.el7_2.1.ppc64.rpm sntp-4.2.6p5-22.el7_2.1.ppc64.rpm ppc64le: ntp-debuginfo-4.2.6p5-22.el7_2.1.ppc64le.rpm sntp-4.2.6p5-22.el7_2.1.ppc64le.rpm s390x: ntp-debuginfo-4.2.6p5-22.el7_2.1.s390x.rpm sntp-4.2.6p5-22.el7_2.1.s390x.rpm x86_64: ntp-debuginfo-4.2.6p5-22.el7_2.1.x86_64.rpm sntp-4.2.6p5-22.el7_2.1.x86_64.rpm Red Hat Enterprise Linux Workstation (v. 7): Source: ntp-4.2.6p5-22.el7_2.1.src.rpm x86_64: ntp-4.2.6p5-22.el7_2.1.x86_64.rpm ntp-debuginfo-4.2.6p5-22.el7_2.1.x86_64.rpm ntpdate-4.2.6p5-22.el7_2.1.x86_64.rpm Red Hat Enterprise Linux Workstation Optional (v. 7): noarch: ntp-doc-4.2.6p5-22.el7_2.1.noarch.rpm ntp-perl-4.2.6p5-22.el7_2.1.noarch.rpm x86_64: ntp-debuginfo-4.2.6p5-22.el7_2.1.x86_64.rpm sntp-4.2.6p5-22.el7_2.1.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-2015-8138 https://access.redhat.com/security/updates/classification/#important 8. Contact: The Red Hat security contact is <secalert@redhat.com>. More contact details at https://access.redhat.com/security/team/contact/ Copyright 2016 Red Hat, Inc. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iD8DBQFWpijmXlSAg2UNWIIRAlKDAJ9cuPIz/2ne6I5rsDoKlg2rFxFKlQCbBhEi h+3u/C5uuGO6PsIJukpD32I= =Osu4 -----END PGP SIGNATURE----- -- RHSA-announce mailing list RHSA-announce@redhat.com https://www.redhat.com/mailman/listinfo/rhsa-announce . CVE-2016-2518 Yihan Lian discovered that an OOB memory access could potentially crash ntpd. For the stable distribution (jessie), these problems have been fixed in version 1:4.2.6.p5+dfsg-7+deb8u2. For the testing distribution (stretch), these problems have been fixed in version 1:4.2.8p7+dfsg-1. For the unstable distribution (sid), these problems have been fixed in version 1:4.2.8p7+dfsg-1. We recommend that you upgrade your ntp packages. Corrected: 2016-01-22 15:55:21 UTC (stable/10, 10.2-STABLE) 2016-01-27 07:41:31 UTC (releng/10.2, 10.2-RELEASE-p11) 2016-01-27 07:41:31 UTC (releng/10.1, 10.1-RELEASE-p28) 2016-01-22 15:56:35 UTC (stable/9, 9.3-STABLE) 2016-01-27 07:42:11 UTC (releng/9.3, 9.3-RELEASE-p35) CVE Name: CVE-2015-7973, CVE-2015-7974, CVE-2015-7975, CVE-2015-7976, CVE-2015-7977, CVE-2015-7978, CVE-2015-7979, CVE-2015-8138, CVE-2015-8139, CVE-2015-8140, CVE-2015-8158 For general information regarding FreeBSD Security Advisories, including descriptions of the fields above, security branches, and the following sections, please visit <URL:https://security.FreeBSD.org/>. II. Problem Description Multiple vulnerabilities have been discovered in ntp 4.2.8p5: Potential Infinite Loop in ntpq. [CVE-2015-8138] Off-path Denial of Service (DoS) attack on authenticated broadcast mode. [CVE-2015-7979] Stack exhaustion in recursive traversal of restriction list. [CVE-2015-7978] reslist NULL pointer dereference. [CVE-2015-7977] ntpq saveconfig command allows dangerous characters in filenames. [CVE-2015-7976] nextvar() missing length check. [CVE-2015-7975] Skeleton Key: Missing key check allows impersonation between authenticated peers. [CVE-2015-7974] Deja Vu: Replay attack on authenticated broadcast mode. [CVE-2015-7973] ntpq vulnerable to replay attacks. [CVE-2015-8140] Origin Leak: ntpq and ntpdc, disclose origin. [CVE-2015-8139] III. Impact A malicious NTP server, or an attacker who can conduct MITM attack by intercepting NTP query traffic, may be able to cause a ntpq client to infinitely loop. [CVE-2015-8158] A malicious NTP server, or an attacker who can conduct MITM attack by intercepting NTP query traffic, may be able to prevent a ntpd(8) daemon to distinguish between legitimate peer responses from forgeries. This can partially be mitigated by configuring multiple time sources. [CVE-2015-8138] An off-path attacker who can send broadcast packets with bad authentication (wrong key, mismatched key, incorrect MAC, etc) to broadcast clients can cause these clients to tear down associations. [CVE-2015-7979] An attacker who can send unauthenticated 'reslist' command to a NTP server may cause it to crash, resulting in a denial of service condition due to stack exhaustion [CVE-2015-7978] or a NULL pointer dereference [CVE-2015-7977]. An attacker who can send 'modify' requests to a NTP server may be able to create file that contain dangerous characters in their name, which could cause dangerous behavior in a later shell invocation. [CVE-2015-7976] A remote attacker may be able to crash a ntpq client. [CVE-2015-7975] A malicious server which holds a trusted key may be able to impersonate other trusted servers in an authenticated configuration. [CVE-2015-7974] A man-in-the-middle attacker or a malicious participant that has the same trusted keys as the victim can replay time packets if the NTP network is configured for broadcast operations. [CVE-2015-7973] The ntpq protocol is vulnerable to replay attacks which may be used to e.g. re-establish an association to malicious server. [CVE-2015-8140] An attacker who can intercept NTP traffic can easily forge live server responses. [CVE-2015-8139] IV. Workaround No workaround is available, but systems not running ntpd(8) are not affected. Network administrators are advised to implement BCP-38, which helps to reduce risk associated with the attacks. V. Solution Perform one of the following: 1) Upgrade your vulnerable system to a supported FreeBSD stable or release / security branch (releng) dated after the correction date. A reboot is recommended but not required. 2) To update your vulnerable system via a binary patch: Systems running a RELEASE version of FreeBSD on the i386 or amd64 platforms can be updated via the freebsd-update(8) utility: # freebsd-update fetch # freebsd-update install The ntpd service has to be restarted after the update. A reboot is recommended but not required. 3) To update your vulnerable system via a source code patch: The following patches have been verified to apply to the applicable FreeBSD release branches. a) Download the relevant patch from the location below, and verify the detached PGP signature using your PGP utility. # fetch https://security.FreeBSD.org/patches/SA-16:09/ntp.patch # fetch https://security.FreeBSD.org/patches/SA-16:09/ntp.patch.asc # gpg --verify ntp.patch.asc b) Apply the patch. Execute the following commands as root: # cd /usr/src # patch < /path/to/patch c) Recompile the operating system using buildworld and installworld as described in <URL:https://www.FreeBSD.org/handbook/makeworld.html>. Restart the applicable daemons, or reboot the system. VI. Correction details The following list contains the correction revision numbers for each affected branch. Branch/path Revision - ------------------------------------------------------------------------- stable/9/ r294570 releng/9.3/ r294905 stable/10/ r294569 releng/10.1/ r294904 releng/10.2/ r294904 - ------------------------------------------------------------------------- To see which files were modified by a particular revision, run the following command, replacing NNNNNN with the revision number, on a machine with Subversion installed: # svn diff -cNNNNNN --summarize svn://svn.freebsd.org/base Or visit the following URL, replacing NNNNNN with the revision number: <URL:https://svnweb.freebsd.org/base?view=revision&revision=NNNNNN> VII

AFFECTED PRODUCTS

CVSS