| Name | CVE-2018-7170 |
| Description | ntpd in ntp 4.2.x before 4.2.8p7 and 4.3.x before 4.3.92 allows authenticated users that know the private symmetric key to create arbitrarily-many ephemeral associations in order to win the clock selection of ntpd and modify a victim's clock via a Sybil attack. This issue exists because of an incomplete fix for CVE-2016-1549. |
| Source | CVE (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 Package | Release | Version | Status |
|---|
| ntp (PTS) | jessie, jessie (lts) | 1:4.2.6.p5+dfsg-7+deb8u3 | vulnerable |
| stretch | 1:4.2.8p10+dfsg-3+deb9u2 | vulnerable |
| buster, buster (lts) | 1:4.2.8p12+dfsg-4+deb10u1 | fixed |
| 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 | (unstable) | 1:4.2.8p11+dfsg-1 | | | |
| ntpsec | source | (unstable) | (not affected) | | | |
Notes
[stretch] - ntp <no-dsa> (Minor issue)
[jessie] - ntp <no-dsa> (Minor issue)
[wheezy] - ntp <no-dsa> (Minor issue)
- ntpsec <not-affected> (Issue not present)
http://www.kb.cert.org/vuls/id/961909
http://support.ntp.org/bin/view/Main/NtpBug3415
http://support.ntp.org/bin/view/Main/SecurityNotice#February_2018_ntp_4_2_8p11_NTP_S