CVE-2017-6464: Input Validation
A vulnerability found in the NTP server makes it possible for an authenticated remote user to crash ntpd via a malformed mode configuration directive.
Mitigation:
Properly monitor your ntpd instances, and auto-restart ntpd (without -g) if it stops running.
Other sources
NTP before 4.2.8p10 and 4.3.x before 4.3.94 allows remote attackers to cause a denial of service (ntpd crash) via a malformed mode configuration directive.
— Launchpad
ntp. Multiple issues were addressed by updating to version 4.2.8p10
Credit
Affected Software
Remediation
Patch Available
Event History
Peer vulnerabilities
Found alongside the following vulnerabilities.
- CVE-2017-13832
- CVE-2016-0736
- CVE-2016-2161
- CVE-2016-5387
- CVE-2016-8740
- CVE-2016-8743
- CVE-2017-13909
- CVE-2017-13809
- CVE-2017-7084
- CVE-2017-7074
- CVE-2017-13820
- CVE-2017-13807
- CVE-2017-7143
- CVE-2017-13829
- CVE-2017-13833
- CVE-2017-7083
- CVE-2017-13821
- CVE-2017-0381
- CVE-2017-13825
- CVE-2017-13890
- CVE-2017-13851
- CVE-2017-7138
- CVE-2017-7121
- CVE-2017-7122
- CVE-2017-7123
- CVE-2017-7124
- CVE-2017-7125
- CVE-2017-7126
- CVE-2017-13815
- CVE-2017-13828
- CVE-2017-13811
- CVE-2017-13835
- CVE-2017-11103
- CVE-2017-13819
- CVE-2017-13830
- CVE-2017-13814
- CVE-2017-13831
- CVE-2017-13837
- CVE-2017-13906
- CVE-2017-7077
- CVE-2017-7119
- CVE-2017-7114
- CVE-2017-13810
- CVE-2017-13817
- CVE-2017-13818
- CVE-2017-13836
- CVE-2017-13841
- CVE-2017-13840
- CVE-2017-13842
- CVE-2017-13782
- CVE-2017-13843
- CVE-2017-13854
- CVE-2017-13834
- CVE-2017-13873
- CVE-2017-13827
- CVE-2017-13813
- CVE-2017-13816
- CVE-2017-13812
- CVE-2016-4736
- CVE-2017-7086
- CVE-2017-1000373
- CVE-2016-9063
- CVE-2017-9233
- CVE-2018-4302
- CVE-2017-5130
- CVE-2017-7376
- CVE-2017-9050
- CVE-2017-9049
- CVE-2017-7141
- CVE-2017-7078
- CVE-2017-6451
- CVE-2017-6452
- CVE-2017-6455
- CVE-2017-6458
- CVE-2017-6459
- CVE-2017-6460
- CVE-2017-6462
- CVE-2017-6463
- CVE-2017-6464
- CVE-2016-9042
- CVE-2017-13824
- CVE-2017-13846
- CVE-2017-10140
- CVE-2017-13822
- CVE-2017-7132
- CVE-2017-13823
- CVE-2017-13808
- CVE-2017-13838
- CVE-2017-7082
- CVE-2017-7080
- CVE-2017-13908
- CVE-2017-13839
- CVE-2017-13910
- CVE-2017-10989
- CVE-2017-7128
- CVE-2017-7129
- CVE-2017-7130
- CVE-2017-7127
- CVE-2016-9840
- CVE-2016-9841
- CVE-2016-9842
- CVE-2016-9843
Frequently Asked Questions
What is the severity of CVE-2017-6464?
CVE-2017-6464 is considered a moderate severity vulnerability due to its ability to crash ntpd instances with a malformed configuration directive.
How do I fix CVE-2017-6464?
To fix CVE-2017-6464, upgrade to NTP versions 4.2.8p10 or higher, or other patched versions.
Which versions of NTP are affected by CVE-2017-6464?
CVE-2017-6464 affects NTP versions before 4.3.94 and 4.2.8p10.
Can CVE-2017-6464 be exploited remotely?
Yes, CVE-2017-6464 can be exploited by authenticated remote users.
What is the recommended mitigation for CVE-2017-6464?
The recommended mitigation is to monitor ntpd instances and ensure they auto-restart if stopped running.