| Name | CVE-2020-11868 |
| Description | ntpd in ntp before 4.2.8p14 and 4.3.x before 4.3.100 allows an off-path attacker to block unauthenticated synchronization via a server mode packet with a spoofed source IP address, because transmissions are rescheduled even when a packet lacks a valid origin timestamp. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DLA-2201-1, ELA-224-1, ELA-224-2 |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| ntp (PTS) | jessie, jessie (lts) | 1:4.2.6.p5+dfsg-7+deb8u3 | fixed |
| stretch | 1:4.2.8p10+dfsg-3+deb9u2 | vulnerable | |
| buster | 1:4.2.8p12+dfsg-4 | vulnerable | |
| bullseye | 1:4.2.8p15+dfsg-1 | fixed | |
| ntpsec (PTS) | buster | 1.1.3+dfsg1-2+deb10u1 | fixed |
| bullseye | 1.2.0+dfsg1-4 | fixed | |
| bookworm (security), bookworm | 1.2.2+dfsg1-1+deb12u1 | fixed | |
| sid, trixie | 1.2.3+dfsg1-3 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| ntp | source | wheezy | 1:4.2.6.p5+dfsg-2+deb7u9 | ELA-224-2 | ||
| ntp | source | jessie | 1:4.2.6.p5+dfsg-7+deb8u3 | DLA-2201-1 | ||
| ntp | source | (unstable) | 1:4.2.8p14+dfsg-1 | |||
| ntpsec | source | (unstable) | (not affected) |
[buster] - ntp <no-dsa> (Minor issue)
[stretch] - ntp <no-dsa> (Minor issue)
- ntpsec <not-affected> (Doesn't affect ntpsec per upstream, #958027)
http://support.ntp.org/bin/view/Main/NtpBug3592
http://bugs.ntp.org/3592
http://bk.ntp.org/ntp-stable/?PAGE=patch&REV=5df73278nIf5dNbaR_vTeCY43_h7Vg
http://bk.ntp.org/ntp-stable/?PAGE=patch&REV=5deb5269ieF1tee6Mp3UJyZOk8DB-Q
https://bugzilla.redhat.com/show_bug.cgi?id=1716665
https://gitlab.com/NTPsec/ntpsec/issues/651