CVE-2015-1798
Fixed in a distro release EPSS 2%
The symmetric-key feature in the receive function in ntp_proto.c in ntpd in NTP 4.x before 4.2.8p2 requires a correct MAC only if the MAC field has a nonzero length, which makes it easier for man-in-the-middle attackers to spoof packets by omitting the MAC.
Products: ntp
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| Debian 11 | ntp | 1:4.2.6.p5+dfsg-6 |
| Debian 6.0 | ntp | 1:4.2.6.p2+dfsg-1+deb6u3 |
| Debian 7 | ntp | 1:4.2.6.p5+dfsg-2+deb7u4 |
| Red Hat Enterprise Linux 6 | ntp | 0:4.2.6p5-5.el6 |
| Red Hat Enterprise Linux 6 | ntp-debuginfo | 0:4.2.6p5-5.el6 |
| Red Hat Enterprise Linux 6 | ntp-doc | 0:4.2.6p5-5.el6 |
| Red Hat Enterprise Linux 6 | ntp-perl | 0:4.2.6p5-5.el6 |
| Red Hat Enterprise Linux 6 | ntpdate | 0:4.2.6p5-5.el6 |
| Red Hat Enterprise Linux 7 | ntp | 0:4.2.6p5-22.el7 |
| Red Hat Enterprise Linux 7 | ntp-debuginfo | 0:4.2.6p5-22.el7 |
| Red Hat Enterprise Linux 7 | ntp-doc | 0:4.2.6p5-22.el7 |
| Red Hat Enterprise Linux 7 | ntp-perl | 0:4.2.6p5-22.el7 |
| Red Hat Enterprise Linux 7 | ntpdate | 0:4.2.6p5-22.el7 |
| Red Hat Enterprise Linux 7 | sntp | 0:4.2.6p5-22.el7 |
| SUSE Linux Enterprise Desktop 12 | ntp | 4.2.6p5-44.1 |
| SUSE Linux Enterprise Server 12 | ntp | 4.2.6p5-44.1 |
| SUSE Linux Enterprise Server for SAP Applications 12 | ntp | 4.2.6p5-44.1 |
| Ubuntu 14.04 LTS | ntp | 1:4.2.6.p5+dfsg-3ubuntu2.14.04.3 |
| openSUSE Tumbleweed | ntp | 4.2.8p9-1.1 |