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CVE-2016-7426

Status Candidate

Overview

NTP before 4.2.8p9 rate limits responses received from the configured sources when rate limiting for all associations is enabled, which allows remote attackers to cause a denial of service (prevent responses from the sources) by sending responses with a spoofed source address.

Related Files

Ubuntu Security Notice USN-3707-2
Posted Jan 23, 2019
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3707-2 - USN-3707-1 and USN-3349-1 fixed several vulnerabilities in NTP. This update provides the corresponding update for Ubuntu 12.04 ESM. 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. Various other issues were also addressed.

tags | advisory, remote, denial of service, spoof, vulnerability
systems | linux, ubuntu
advisories | CVE-2016-7426, CVE-2016-9310, CVE-2016-9311, CVE-2017-6462, CVE-2017-6463, CVE-2018-7183, CVE-2018-7185
SHA-256 | 491d58f999c7eea8810601c09831b240d9aedad6123ec22fdeec53a32edec41b
Ubuntu Security Notice USN-3349-1
Posted Jul 6, 2017
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3349-1 - Yihan Lian discovered that NTP incorrectly handled certain large request data values. A remote attacker could possibly use this issue to cause NTP to crash, resulting in a denial of service. This issue only affected Ubuntu 16.04 LTS. 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. This issue only affected Ubuntu 14.04 LTS, Ubuntu 16.04 LTS, and Ubuntu 16.10. Various other issues were also addressed.

tags | advisory, remote, denial of service, spoof
systems | linux, ubuntu
advisories | CVE-2016-2519, CVE-2016-7426, CVE-2016-7427, CVE-2016-7428, CVE-2016-7429, CVE-2016-7431, CVE-2016-7433, CVE-2016-7434, CVE-2016-9042, CVE-2016-9310, CVE-2016-9311, CVE-2017-6458, CVE-2017-6460, CVE-2017-6462, CVE-2017-6463, CVE-2017-6464
SHA-256 | 359f86f0252b15d6299bffee359feeea850698a32c5afa2a570d94db465a75ab
HPE Security Bulletin HPESBUX03706 1
Posted Mar 12, 2017
Authored by Hewlett Packard Enterprise | Site hpe.com

HPE Security Bulletin HPESBUX03706 1 - Potential security vulnerabilities have been identified in the HP-UX-NTP service running ntpd. These vulnerabilities could be exploited remotely to allow a denial of service (DoS), unauthorized modification, and access restriction bypass. Revision 1 of this advisory.

tags | advisory, denial of service, vulnerability
systems | hpux
advisories | CVE-2016-7426, CVE-2016-7427, CVE-2016-7428, CVE-2016-7429, CVE-2016-7431, CVE-2016-7433, CVE-2016-7434, CVE-2016-9310, CVE-2016-9311
SHA-256 | 1b4eef10352a8be82656e108c32a07e6007d14cd20ec65cd19f4dbf4f1217e7e
Red Hat Security Advisory 2017-0252-01
Posted Feb 6, 2017
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2017-0252-01 - The Network Time Protocol 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: 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.

tags | advisory, remote, denial of service, protocol
systems | linux, redhat
advisories | CVE-2016-7426, CVE-2016-7429, CVE-2016-7433, CVE-2016-9310, CVE-2016-9311
SHA-256 | e1bad53734e5d3bf7a50e7a4efe74c3ec410e5733fd4963d1997818ac1dd059f
FreeBSD Security Advisory - FreeBSD-SA-16.39.ntp
Posted Dec 21, 2016
Authored by Network Time Foundation | Site security.freebsd.org

FreeBSD Security Advisory - Multiple vulnerabilities have been discovered in the NTP suite.

tags | advisory, vulnerability
systems | freebsd, bsd
advisories | CVE-2016-7426, CVE-2016-7427, CVE-2016-7428, CVE-2016-7431
SHA-256 | 33824530cddd9387168daf3f7afeba89dddbc5899597c45b606169369c028f6b
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