| Name | CVE-2015-7871 | 
| Description | Crypto-NAK packets in ntpd in NTP 4.2.x before 4.2.8p4, and 4.3.x before 4.3.77 allows remote attackers to bypass authentication. | 
| Source | CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) | 
| References | DLA-335-1, DSA-3388-1 | 
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status | 
|---|
| ntp (PTS) | 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 | squeeze | 1:4.2.6.p2+dfsg-1+deb6u4 |  | DLA-335-1 |  | 
| ntp | source | wheezy | 1:4.2.6.p5+dfsg-2+deb7u6 |  | DSA-3388-1 |  | 
| ntp | source | jessie | 1:4.2.6.p5+dfsg-7+deb8u1 |  | DSA-3388-1 |  | 
| ntp | source | (unstable) | 1:4.2.8p4+dfsg-1 |  |  |  | 
Notes
http://support.ntp.org/bin/view/Main/SecurityNotice#October_2015_NTP_Security_Vulner
https://github.com/ntp-project/ntp/commit/aa44b5835d69d8ee031736bb8ee2730a514edb7d