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NTP.org 'ntp' 'decodenetnum' And 'loop counter underrun' DoS Vulnerabilities
Information
Severity
Severity
Medium
Family
Family
Denial of Service
CVSSv2 Base
CVSSv2 Base
5.0
CVSSv2 Vector
CVSSv2 Vector
AV:N/AC:L/Au:N/C:N/I:N/A:P
Solution Type
Solution Type
Vendor Patch
Created
Created
7 years ago
Modified
Modified
5 years ago
Summary
The host is running NTP.org's reference implementation of NTP server, ntpd and is prone to multiple denial of service vulnerabilities.
Insight
Insight
Multiple errors are due to - A flaw in 'decodenetnum' function which will abort with an assertion failure instead of simply returning a failure condition when ntpd is fed a crafted packet. - An integer overflow can occur in application.
Affected Software
Affected Software
All ntp-4 release prior to 4.2.8p4 and 4.3.0 prior to 4.3.77
Detection Method
Detection Method
Checks if a vulnerable version is present on the target host.
Solution
Solution
Upgrade to ntp4.2.8p4 or 4.3.77 or later.