CVE-2016-2517

NameCVE-2016-2517
DescriptionNTP before 4.2.8p7 and 4.3.x before 4.3.92 allows remote attackers to cause a denial of service (prevent subsequent authentication) by leveraging knowledge of the controlkey or requestkey and sending a crafted packet to ntpd, which changes the value of trustedkey, controlkey, or requestkey. NOTE: this vulnerability exists because of a CVE-2016-2516 regression.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
ntp (PTS)jessie, jessie (lts)1:4.2.6.p5+dfsg-7+deb8u3vulnerable
stretch1:4.2.8p10+dfsg-3+deb9u2fixed
buster, buster (lts)1:4.2.8p12+dfsg-4+deb10u1fixed
bullseye1:4.2.8p15+dfsg-1fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
ntpsource(unstable)1:4.2.8p7+dfsg-1unimportant

Notes

http://support.ntp.org/bin/view/Main/SecurityNotice#April_2016_NTP_4_2_8p7_Security
not a security issue, anyone with the privileges for remote configuration can
cause trouble anyway

Search for package or bug name: Reporting problems