USN-3707-2: NTP vulnerabilities

Releases

• Ubuntu 12.04

Packages

• 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

• ntp - 1:4.2.6.p3+dfsg-1ubuntu3.12

In general, a standard system update will make all the necessary changes.

References

• 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

Related notices

• USN-3349-1: ntpdate, ntp, ntp-doc
• USN-3707-1: ntpdate, ntp, ntp-doc, sntp