| Name | CVE-2016-4953 |
| Description | ntpd in NTP 4.x before 4.2.8p8 allows remote attackers to cause a denial of service (ephemeral-association demobilization) by sending a spoofed crypto-NAK packet with incorrect authentication data at a certain time. |
| 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 | fixed |
| stretch | 1:4.2.8p10+dfsg-3+deb9u2 | fixed |
| buster | 1:4.2.8p12+dfsg-4 | fixed |
| bullseye | 1:4.2.8p15+dfsg-1 | 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 | (not affected) | | | |
| ntp | source | jessie | (not affected) | | | |
| ntp | source | (unstable) | 1:4.2.8p8+dfsg-1 | | | |
Notes
[jessie] - ntp <not-affected> (Upstream fix for CVE-2016-1547 or CVE-2015-7979 wasn't backported)
[wheezy] - ntp <not-affected> (Fix for CVE-2016-1547 or CVE-2015-7979 wasn't backported)
http://support.ntp.org/bin/view/Main/SecurityNotice#June_2016_ntp_4_2_8p8_NTP_Securi
http://support.ntp.org/bin/view/Main/NtpBug3045