CVE:CVE-2015-7975
CNNVD:CNNVD-201602-087
NTP（Network Time Protocol，网络时间协议）是一款通过网络同步计算机时钟的协议。
NTP 4.2.8p6之前的版本和4.3.90之前的4.3.x版本中的‘nextvar’函数存在安全漏洞，该漏洞源于程序没有正确的验证输入的长度。攻击者可利用该漏洞造成拒绝服务（应用程序崩溃）。
solution:Upgrade ntp ntp to a higher version than *:p5,4.3.0,4.3.1,4.3.2,4.3.3,4.3.4,4.3.5,4.3.6,4.3.7,4.3.8,4.3.10,4.3.11,4.3.12,4.3.13,4.3.14,4.3.15,4.3.16,4.3.17,4.3.18,4.3.19,4.3.20,4.3.21,4.3.22,4.3.23,4.3.24,4.3.25,4.3.26,4.3.27,4.3.28,4.3.29,4.3.30,4.3.31,4.3.32,4.3.33,4.3.34,4.3.35,4.3.36,4.3.37,4.3.38,4.3.39,4.3.40,4.3.41,4.3.42,4.3.43,4.3.44,4.3.45,4.3.46,4.3.47,4.3.48,4.3.49,4.3.50,4.3.51,4.3.52,4.3.53,4.3.54,4.3.55,4.3.56,4.3.57,4.3.58,4.3.59,4.3.60,4.3.61,4.3.62,4.3.63,4.3.64,4.3.65,4.3.66,4.3.67,4.3.68,4.3.69,4.3.70,4.3.71,4.3.72,4.3.73,4.3.74,4.3.75,4.3.76,4.3.77,4.3.78,4.3.79,4.3.80,4.3.81,4.3.82,4.3.83,4.3.84,4.3.85,4.3.86,4.3.87,4.3.88,4.3.89,and avoid the version *:p5,4.3.0,4.3.1,4.3.2,4.3.3,4.3.4,4.3.5,4.3.6,4.3.7,4.3.8,4.3.10,4.3.11,4.3.12,4.3.13,4.3.14,4.3.15,4.3.16,4.3.17,4.3.18,4.3.19,4.3.20,4.3.21,4.3.22,4.3.23,4.3.24,4.3.25,4.3.26,4.3.27,4.3.28,4.3.29,4.3.30,4.3.31,4.3.32,4.3.33,4.3.34,4.3.35,4.3.36,4.3.37,4.3.38,4.3.39,4.3.40,4.3.41,4.3.42,4.3.43,4.3.44,4.3.45,4.3.46,4.3.47,4.3.48,4.3.49,4.3.50,4.3.51,4.3.52,4.3.53,4.3.54,4.3.55,4.3.56,4.3.57,4.3.58,4.3.59,4.3.60,4.3.61,4.3.62,4.3.63,4.3.64,4.3.65,4.3.66,4.3.67,4.3.68,4.3.69,4.3.70,4.3.71,4.3.72,4.3.73,4.3.74,4.3.75,4.3.76,4.3.77,4.3.78,4.3.79,4.3.80,4.3.81,4.3.82,4.3.83,4.3.84,4.3.85,4.3.86,4.3.87,4.3.88,4.3.89