| Name | CVE-2015-7855 |
| Description | The decodenetnum function in ntpd in NTP 4.2.x before 4.2.8p4, and 4.3.x before 4.3.77 allows remote attackers to cause a denial of service (assertion failure) via a 6 or mode 7 packet containing a long data value. |
| 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-335-1, DSA-3388-1 |
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, buster (lts) | 1:4.2.8p12+dfsg-4+deb10u1 | 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 | 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/ba716a464ecb20618560075f2e4e1051e5b6f24f