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
To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.
In general, a standard system update will make all the necessary changes.