Ubuntu Security Notice 3096-1 - Aanchal Malhotra discovered that NTP incorrectly handled authenticated broadcast mode. A remote attacker could use this issue to perform a replay attack. Matt Street discovered that NTP incorrectly verified peer associations of symmetric keys. A remote attacker could use this issue to perform an impersonation attack. Jonathan Gardner discovered that the NTP ntpq utility incorrectly handled memory. An attacker could possibly use this issue to cause ntpq to crash, resulting in a denial of service. This issue only affected Ubuntu 16.04 LTS. Various other issues were also addressed.
b8f300fae17a52f76a9e98de101486d8e3686770df1e46d25f5d8739810e8276Red Hat Security Advisory 2016-1552-01 - 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 was configured in broadcast mode, a remote attacker could broadcast packets with bad authentication to all clients. The clients, upon receiving the malformed packets, would break the association with the broadcast server, causing them to become out of sync over a longer period of time.
982f50fa8b97d822ee7769419c9cd525cf7fd9404293efaa3ed43a534a036354Debian Linux Security Advisory 3629-1 - Several vulnerabilities were discovered in the Network Time Protocol daemon and utility programs.
928596a20913fd01d3f58cfb75578feb56c3ebee5c0640ed9f639ec7fd418fa2Gentoo Linux Security Advisory 201607-15 - Multiple vulnerabilities have been found in NTP, the worst of which could lead to Denial of Service. Versions less than 4.2.8_p8 are affected.
1cee38cbbf4cfcbee63ab9a3fb2cb62dbfa060e41bf33390b2adc1fcf92ddd84Red Hat Security Advisory 2016-1141-01 - 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 was configured in broadcast mode, a remote attacker could broadcast packets with bad authentication to all clients. The clients, upon receiving the malformed packets, would break the association with the broadcast server, causing them to become out of sync over a longer period of time.
257f45bddd3a482cefdb68cd619ab45fea0981268baa2dd55b47f82d7abb25a9Slackware Security Advisory - New ntp packages are available for Slackware 13.0, 13.1, 13.37, 14.0, 14.1, and -current to fix security issues.
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