CVE-2009-3563

NameCVE-2009-3563
Descriptionntp_request.c in ntpd in NTP before 4.2.4p8, and 4.2.5, allows remote attackers to cause a denial of service (CPU and bandwidth consumption) by using MODE_PRIVATE to send a spoofed (1) request or (2) response packet that triggers a continuous exchange of MODE_PRIVATE error responses between two NTP daemons.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
ReferencesDSA-1948-1
Debian Bugs560074

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+deb8u3fixed
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
ntpsourceetch1:4.2.2.p4+dfsg-2etch4DSA-1948-1
ntpsourcelenny1:4.2.4p4+dfsg-8lenny3DSA-1948-1
ntpsource(unstable)1:4.2.4p8+dfsg-1medium560074
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