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NTP < 4.2.8p2, 4.3.x < 4.3.12 Keygen Vulnerability
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:P/I:N/A:N
Solution Type
Solution Type
Vendor Patch
Created
Created
2 years ago
Modified
Modified
2 years ago
Summary
NTP is prone to a vulnerability in ntp-keygen.
Insight
Insight
ntp-keygen does not generate MD5 keys with sufficient entropy on big endian machines when the lowest order byte of the temp variable is between 0x20 and 0x7f and not #, which might allow remote attackers to obtain the value of generated MD5 keys via a brute force attack with the 93 possible keys.
Affected Software
Affected Software
NTPd versions prior to 4.2.8p2 and 4.3.x before 4.3.12.
Detection Method
Detection Method
Checks if a vulnerable version is present on the target host.
Solution
Solution
Update to version 4.2.8p2 or later.