CVE-2016-4955
Medium
Description
ntpd in NTP 4.x before 4.2.8p8, when autokey is enabled, allows remote attackers to cause a denial of service (peer-variable clearing and association outage) by sending (1) a spoofed crypto-NAK packet or (2) a packet with an incorrect MAC value at a certain time.
SeverityMedium
CVSS5.9
Exploit probability—
Product
Ntp
PublishedJul 5, 2016
First seenJul 5, 2016
How to fix
Update
- ntp ntp4.2.8, 4.3.93 or later
Vendor advisories
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WNWGCQLW2VY72NIUYMJOCAKJKTXHDUK2/
- security.freebsd.org/advisories/FreeBSD-SA-16:24.ntp.asc
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ORAMN3Q7TVJ54MBYF75XCJOE3DP7LYHT/
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/K3EYJQHJZ2KTVQ7ICEFHXTLZ36MRASWX/
- security.gentoo.org/glsa/201607-15
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| ntp ntp | 4.2.0 ≤ v < 4.2.8, 4.3.0 ≤ v < 4.3.93, 4.2.8 | 4.2.8, 4.3.93 |
| oracle solaris | 10, 11.3 | — |
| suse manager_proxy | 2.1 | — |
| suse openstack_cloud | 5 | — |
| novell suse_manager | 2.1 | — |
| opensuse leap | 42.1 | — |
| opensuse opensuse | 13.2 | — |
| suse linux_enterprise_desktop | 12 | — |
| suse linux_enterprise_server | 11, 12 | — |
| siemens simatic_net_cp_443-1_opc_ua_firmware | No range specified | — |
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