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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2015.2961 Important: ntp security update 27 November 2015 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: ntp Publisher: Red Hat Operating System: Red Hat Enterprise Linux Server 6 Impact/Access: Denial of Service -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2015-7704 Reference: ESB-2015.2694 Original Bulletin: https://rhn.redhat.com/errata/RHSA-2015-2520.html - --------------------------BEGIN INCLUDED TEXT-------------------- - -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 ===================================================================== Red Hat Security Advisory Synopsis: Important: ntp security update Advisory ID: RHSA-2015:2520-01 Product: Red Hat Enterprise Linux Advisory URL: https://rhn.redhat.com/errata/RHSA-2015-2520.html Issue date: 2015-11-26 CVE Names: CVE-2015-7704 ===================================================================== 1. Summary: Updated ntp packages that fix one security issue are now available for Red Hat Enterprise Linux 6.5 and 6.6 Extended Update Support. 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 Compute Node Optional EUS (v. 6.5) - noarch, x86_64 Red Hat Enterprise Linux Compute Node Optional EUS (v. 6.6) - noarch, x86_64 Red Hat Enterprise Linux HPC Node EUS (v. 6.5) - x86_64 Red Hat Enterprise Linux HPC Node EUS (v. 6.6) - x86_64 Red Hat Enterprise Linux Server EUS (v. 6.5) - i386, ppc64, s390x, x86_64 Red Hat Enterprise Linux Server EUS (v. 6.6) - i386, ppc64, s390x, x86_64 Red Hat Enterprise Linux Server Optional EUS (v. 6.5) - i386, noarch, ppc64, s390x, x86_64 Red Hat Enterprise Linux Server Optional EUS (v. 6.6) - i386, noarch, ppc64, s390x, 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 timestamps in Kiss-of-Death packets. A remote attacker could use this flaw to send a crafted Kiss-of-Death packet to an ntpd client that would increase the client's polling interval value, and effectively disable synchronization with the server. (CVE-2015-7704) Red Hat would like to thank Aanchal Malhotra, Isaac E. Cohen, and Sharon Goldberg of Boston University for reporting this issue. 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/): 1271070 - CVE-2015-7704 ntp: disabling synchronization via crafted KoD packet 6. Package List: Red Hat Enterprise Linux HPC Node EUS (v. 6.5): Source: ntp-4.2.6p5-2.el6_5.1.src.rpm x86_64: ntp-4.2.6p5-2.el6_5.1.x86_64.rpm ntp-debuginfo-4.2.6p5-2.el6_5.1.x86_64.rpm ntpdate-4.2.6p5-2.el6_5.1.x86_64.rpm Red Hat Enterprise Linux HPC Node EUS (v. 6.6): Source: ntp-4.2.6p5-3.el6_6.1.src.rpm x86_64: ntp-4.2.6p5-3.el6_6.1.x86_64.rpm ntp-debuginfo-4.2.6p5-3.el6_6.1.x86_64.rpm ntpdate-4.2.6p5-3.el6_6.1.x86_64.rpm Red Hat Enterprise Linux Compute Node Optional EUS (v. 6.5): Source: ntp-4.2.6p5-2.el6_5.1.src.rpm noarch: ntp-doc-4.2.6p5-2.el6_5.1.noarch.rpm x86_64: ntp-debuginfo-4.2.6p5-2.el6_5.1.x86_64.rpm ntp-perl-4.2.6p5-2.el6_5.1.x86_64.rpm Red Hat Enterprise Linux Compute Node Optional EUS (v. 6.6): noarch: ntp-doc-4.2.6p5-3.el6_6.1.noarch.rpm x86_64: ntp-debuginfo-4.2.6p5-3.el6_6.1.x86_64.rpm ntp-perl-4.2.6p5-3.el6_6.1.x86_64.rpm Red Hat Enterprise Linux Server EUS (v. 6.5): Source: ntp-4.2.6p5-2.el6_5.1.src.rpm i386: ntp-4.2.6p5-2.el6_5.1.i686.rpm ntp-debuginfo-4.2.6p5-2.el6_5.1.i686.rpm ntpdate-4.2.6p5-2.el6_5.1.i686.rpm ppc64: ntp-4.2.6p5-2.el6_5.1.ppc64.rpm ntp-debuginfo-4.2.6p5-2.el6_5.1.ppc64.rpm ntpdate-4.2.6p5-2.el6_5.1.ppc64.rpm s390x: ntp-4.2.6p5-2.el6_5.1.s390x.rpm ntp-debuginfo-4.2.6p5-2.el6_5.1.s390x.rpm ntpdate-4.2.6p5-2.el6_5.1.s390x.rpm x86_64: ntp-4.2.6p5-2.el6_5.1.x86_64.rpm ntp-debuginfo-4.2.6p5-2.el6_5.1.x86_64.rpm ntpdate-4.2.6p5-2.el6_5.1.x86_64.rpm Red Hat Enterprise Linux Server EUS (v. 6.6): Source: ntp-4.2.6p5-3.el6_6.1.src.rpm i386: ntp-4.2.6p5-3.el6_6.1.i686.rpm ntp-debuginfo-4.2.6p5-3.el6_6.1.i686.rpm ntpdate-4.2.6p5-3.el6_6.1.i686.rpm ppc64: ntp-4.2.6p5-3.el6_6.1.ppc64.rpm ntp-debuginfo-4.2.6p5-3.el6_6.1.ppc64.rpm ntpdate-4.2.6p5-3.el6_6.1.ppc64.rpm s390x: ntp-4.2.6p5-3.el6_6.1.s390x.rpm ntp-debuginfo-4.2.6p5-3.el6_6.1.s390x.rpm ntpdate-4.2.6p5-3.el6_6.1.s390x.rpm x86_64: ntp-4.2.6p5-3.el6_6.1.x86_64.rpm ntp-debuginfo-4.2.6p5-3.el6_6.1.x86_64.rpm ntpdate-4.2.6p5-3.el6_6.1.x86_64.rpm Red Hat Enterprise Linux Server Optional EUS (v. 6.5): Source: ntp-4.2.6p5-2.el6_5.1.src.rpm i386: ntp-debuginfo-4.2.6p5-2.el6_5.1.i686.rpm ntp-perl-4.2.6p5-2.el6_5.1.i686.rpm noarch: ntp-doc-4.2.6p5-2.el6_5.1.noarch.rpm ppc64: ntp-debuginfo-4.2.6p5-2.el6_5.1.ppc64.rpm ntp-perl-4.2.6p5-2.el6_5.1.ppc64.rpm s390x: ntp-debuginfo-4.2.6p5-2.el6_5.1.s390x.rpm ntp-perl-4.2.6p5-2.el6_5.1.s390x.rpm x86_64: ntp-debuginfo-4.2.6p5-2.el6_5.1.x86_64.rpm ntp-perl-4.2.6p5-2.el6_5.1.x86_64.rpm Red Hat Enterprise Linux Server Optional EUS (v. 6.6): i386: ntp-debuginfo-4.2.6p5-3.el6_6.1.i686.rpm ntp-perl-4.2.6p5-3.el6_6.1.i686.rpm noarch: ntp-doc-4.2.6p5-3.el6_6.1.noarch.rpm ppc64: ntp-debuginfo-4.2.6p5-3.el6_6.1.ppc64.rpm ntp-perl-4.2.6p5-3.el6_6.1.ppc64.rpm s390x: ntp-debuginfo-4.2.6p5-3.el6_6.1.s390x.rpm ntp-perl-4.2.6p5-3.el6_6.1.s390x.rpm x86_64: ntp-debuginfo-4.2.6p5-3.el6_6.1.x86_64.rpm ntp-perl-4.2.6p5-3.el6_6.1.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-2015-7704 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 2015 Red Hat, Inc. - -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iD8DBQFWVxQRXlSAg2UNWIIRAn3FAJ9kauV52JaskxqIQrOKCK9OQ3zn/ACfbn/9 IGHD8SGjeD8S9bWrpmj4v2I= =ub4I - -----END PGP SIGNATURE----- - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. 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On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQIVAwUBVletmn6ZAP0PgtI9AQJpKw/+PmpTm5G211VnwJoVxWFTw7BTDWmhVQKR hcYdqn4oP/gGqsDcp1OZt1O9FuR8mterYggRixUc9hUUwPdilsqExNcFOaafFCmH xt8kZbjABmV++bQSXdAPW5PE1gh5zuaZNMNJFcvRkOIObwwbVBL56Z5RHDXp2iU6 FY5wHjLUZYxsPdazPSPOrqtO0q62ZLDBVv+y7aaGQgw4vgcUAqbNrWdI8GsRGYjt 1JdQT7HPNJK20POYPbB/+BxDLhMz9BQEYtxbbiBegJV3BtXAPHbmzZg5yemiiVu1 WIqEue4yLb44aiSbuPiSTR8gWlaUpvo/Nl91dhdQ1nWzqz/6V3gI0YChZz/IpxlF SvKGm7rOdFr+ZFa4iCmCu8n5hh3hGvoCyMGrz7AIxfE9bfIXjuxlclvEhRdH6Zfb +M481oSe5hxY2+/mASctTYggNXiUG5PHSwfkXW1z54cbtXKl27t7DyPAQvFVlijg fLDAP3lWJ31PsiW8tCEUVVGJ1H1AhCnE6iC5Tv6AaviOGVNvMc1FLmVVMCfGAtYG 0uz37trgNDUCGIuVvGeRo55BZZLwoqBtcxRa8grm0fyRHSloxs/rZQH8G6PGuxH8 PeyJEdOw4NlB4wapTkovMUb1OD712p6xChfres42B1SL/JDv8lLZHD7SQifCL9sN Z2S9xgxdZUA= =b0bP -----END PGP SIGNATURE-----