Looking at the changelogs it seems debian fixed the bug you linked in versions 1:4.2.6.p5+dfsg-3.2 and 1:4.2.6.p5+dfsg-2+deb7u1
http://metadata.ftp-master.debian.org/changelogs//main/n/ntp/ntp_4.2.6.p5+dfsg-7+deb8u1_changelog
Looking at the changelogs it seems debian fixed the bug you linked in versions 1:4.2.6.p5+dfsg-3.2 and 1:4.2.6. p5+dfsg- 2+deb7u1
http:// metadata. ftp-master. debian. org/changelogs/ /main/n/ ntp/ntp_ 4.2.6.p5+ dfsg-7+ deb8u1_ changelog