漏洞描述
Network Time Protocol（NTP）是用来使计算机时间同步化的一种协议，它可以使计算机对其服务器或时钟源（如石英钟，GPS等等)做同步化。
ntpd 4.2.8之前版本，在实现上存在多个栈缓冲区溢出漏洞，远程攻击者通过构造的数据包，可触发ntpd函数crypto_recv() (用autokey进行身份验证), ctl_putdata(), configure()缓冲区溢出，用ntpd进程的权限执行任意代码。
解决方法
NTP
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目前厂商已经发布了升级补丁以修复这个安全问题，请到厂商的主页下载：
http://support.ntp.org/bin/view/Main/SecurityNotice
http://www.ntp.org/downloads.html
http://www.ntp.org/ntpfaq/NTP-s-algo-crypt.htm
https://ics-cert.us-cert.gov/advisories/ICSA-14-353-01
对于具体Linux发行版本中使用的版本，可以参考如下链接，确认是否受该漏洞影响:
HP-UX:
http://h20565.www2.hp.com/hpsc/doc/public/display?docId=emr_na-c04554677
SUSE:
https://www.suse.com/security/cve/CVE-2014-9295.html
Fedora:
https://lists.fedoraproject.org/pipermail/package-announce/2014-December/146861.html
https://lists.fedoraproject.org/pipermail/package-announce/2014-December/146911.html
https://lists.fedoraproject.org/pipermail/package-announce/2014-December/147230.html
Redhat:
https://rhn.redhat.com/errata/RHSA-2015-0104.html
https://rhn.redhat.com/errata/RHSA-2014-2025.html
https://rhn.redhat.com/errata/RHSA-2014-2024.html
Gentoo:
https://security.gentoo.org/glsa/201412-34
Slackware:
http://www.slackware.com/security/viewer.php?l=slackware-security&y=2014&m=slackware-security.520762
FreeBSD:
https://vuxml.freebsd.org/freebsd/4033d826-87dd-11e4-9079-3c970e169bc2.html
Ubuntu:
http://www.ubuntu.com/usn/usn-2449-1
Solaris:
https://blogs.oracle.com/sunsecurity/entry/multiple_vulnerabilities_in_ntp
Debian:
https://security-tracker.debian.org/tracker/DLA-116-1
https://security-tracker.debian.org/tracker/DSA-3108-1
AIX:
http://aix.software.ibm.com/aix/efixes/security/ntp_advisory2.asc
http://aix.software.ibm.com/aix/efixes/security/ntp_advisory2.asc
http://aix.software.ibm.com/aix/efixes/security/ntp_advisory2.asc
http://aix.software.ibm.com/aix/efixes/security/ntp_advisory2.asc
http://aix.software.ibm.com/aix/efixes/security/ntp_advisory2.asc
原文地址：https://www.cnblogs.com/mrhonest/p/11150557.html