| Name | CVE-2016-9042 |
| Description | An exploitable denial of service vulnerability exists in the origin timestamp check functionality of ntpd 4.2.8p9. A specially crafted unauthenticated network packet can be used to reset the expected origin timestamp for target peers. Legitimate replies from targeted peers will fail the origin timestamp check (TEST2) causing the reply to be dropped and creating a denial of service condition. |
| 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) | 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) | 1:4.2.8p10+dfsg-1 | | | |
Notes
[jessie] - ntp <not-affected> (Doesn't use the affected upstream patch)
[wheezy] - ntp <not-affected> (Doesn't use the affected upstream patch)
http://www.talosintelligence.com/reports/TALOS-2016-0260/
http://support.ntp.org/bin/view/Main/NtpBug3361
This vulnerability affects the upstream fix for CVE-2015-8138, but Debian
jessie and wheezy use a less invasive patch by Miroslav Lichvar
of Red Hat, as available here:
http://pkgs.fedoraproject.org/cgit/rpms/ntp.git/tree/ntp-4.2.6p5-cve-2015-8138.patch?h=f24