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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2019.0203 NTP vulnerabilities 24 January 2019 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: ntp Publisher: Ubuntu Operating System: Ubuntu Impact/Access: Execute Arbitrary Code/Commands -- Remote/Unauthenticated Denial of Service -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2018-7185 CVE-2018-7183 CVE-2017-6463 CVE-2017-6462 CVE-2016-9311 CVE-2016-9310 CVE-2016-7428 CVE-2016-7427 CVE-2016-7426 Reference: ASB-2018.0120 ASB-2018.0096 ESB-2018.3515 ESB-2018.3049 ASB-2017.0219 Original Bulletin: http://www.ubuntu.com/usn/usn-3707-2 - --------------------------BEGIN INCLUDED TEXT-------------------- ========================================================================== Ubuntu Security Notice USN-3707-2 January 23, 2019 ntp vulnerabilities ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - - Ubuntu 12.04 ESM Summary: Several security issues were fixed in NTP. Software Description: - - ntp: Network Time Protocol daemon and utility programs Details: USN-3707-1 and USN-3349-1 fixed several vulnerabilities in NTP. This update provides the corresponding update for Ubuntu 12.04 ESM. Original advisory details:  Miroslav Lichvar discovered that NTP incorrectly handled certain  spoofed addresses when performing rate limiting. A remote attacker  could possibly use this issue to perform a denial of service.  (CVE-2016-7426)  Matthew Van Gundy discovered that NTP incorrectly handled certain  crafted broadcast mode packets. A remote attacker could possibly use  this issue to perform a denial of service.  (CVE-2016-7427, CVE-2016-7428)  Matthew Van Gundy discovered that NTP incorrectly handled certain  control mode packets. A remote attacker could use this issue to set or  unset traps. (CVE-2016-9310)  Matthew Van Gundy discovered that NTP incorrectly handled the trap  service. A remote attacker could possibly use this issue to cause NTP  to crash, resulting in a denial of service. (CVE-2016-9311)  It was discovered that the NTP legacy DPTS refclock driver incorrectly  handled the /dev/datum device. A local attacker could possibly use  this issue to cause a denial of service. (CVE-2017-6462)  It was discovered that NTP incorrectly handled certain invalid  settings in a :config directive. A remote authenticated user could  possibly use this issue to cause NTP to crash, resulting in a denial  of service. (CVE-2017-6463)  Michael Macnair discovered that NTP incorrectly handled certain  responses. A remote attacker could possibly use this issue to execute  arbitrary code. (CVE-2018-7183)  Miroslav Lichvar discovered that NTP incorrectly handled certain  zero-origin timestamps. A remote attacker could possibly use this  issue to cause a denial of service. (CVE-2018-7185) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 12.04 ESM:  ntp                             1:4.2.6.p3+dfsg-1ubuntu3.12 In general, a standard system update will make all the necessary changes. References:  https://usn.ubuntu.com/usn/usn-3707-2  https://usn.ubuntu.com/usn/usn-3707-1  CVE-2016-7426, CVE-2016-7427, CVE-2016-7428, CVE-2016-9310,  CVE-2016-9311, CVE-2017-6462, CVE-2017-6463, CVE-2018-7183,  CVE-2018-7185 - --------------------------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. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. NOTE: Third Party Rights This security bulletin is provided as a service to AusCERT's members. As AusCERT did not write the document quoted above, AusCERT has had no control over its content. The decision to follow or act on information or advice contained in this security bulletin is the responsibility of each user or organisation, and should be considered in accordance with your organisation's site policies and procedures. AusCERT takes no responsibility for consequences which may arise from following or acting on information or advice contained in this security bulletin. NOTE: This is only the original release of the security bulletin. It may not be updated when updates to the original are made. If downloading at a later date, it is recommended that the bulletin is retrieved directly from the author's website to ensure that the information is still current. Contact information for the authors of the original document is included in the Security Bulletin above. If you have any questions or need further information, please contact them directly. Previous advisories and external security bulletins can be retrieved from: https://www.auscert.org.au/bulletins/ =========================================================================== Australian Computer Emergency Response Team The University of Queensland Brisbane Qld 4072 Internet Email: auscert@auscert.org.au Facsimile: (07) 3365 7031 Telephone: (07) 3365 4417 (International: +61 7 3365 4417) AusCERT personnel answer during Queensland business hours which are GMT+10:00 (AEST). On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQIVAwUBXEjuXmaOgq3Tt24GAQgBQg/+JAYv9Q6bG7h4kGmrQqSnps1+0APT9e0x RCjiO0Joro7IafV23qx3Yds+IdiN9xU+nKmsvTDFrcG74u1p+9XRg0F1WqCy37sn H971p3IdlkBrTNGfxaCNcLkDPT7YRvCWdSScqsWL+lasEIhIgWpqo3kSKYKNW2D7 /Pn923/hMVzx1IXPIXI0Xxac8VlnCwO4BPO/Xao3dTYlQrUlBo9k2gv56Ku40gqU I7M80Epaw1ohZLjjDZw9HYbB8MuVYMwW86g4aieiOUpGnVfD+52RGHU+mlkgd4K1 gIkuxtSOllFFTGacyOlIrIsm3cpBtCgGOzfr2p/4D1jktL2invuVKGbu0AuR+SRw Ll2S03IzFGoDlCwZB1B+1CcaxAquNck8Urot6nZTN5pH9Ev/oLgXG6OE0fNZch1z Iso8s8P3CoDZI9fY9lXTjiLcLmSElU8w9FeaVBtGgKZ+EKqkoYcIq28fuce9/aSW FKNxLPiwSdlRW5OK7050G/VYZQPUpgevj8QLuI7UFGMF6a51g7uPI49dKQkU9gdd ghuSAKSHPog3TuoWV5GOqM7h42njm6YUfHssd30ZbyKkK9EoOORJxY5puTk7Cb29 yrLrREAwneF2PUlnfqbBXDANl8anbSitHY344rV4cxAiDZ0RwsnLeVWJ3iaElU+6 1G0Rt61+pS4= =5m+9 -----END PGP SIGNATURE-----