Vulnerability CVE-2016-4955
Published: 2016-07-04   Modified: 2016-07-05

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.

Type:

CWE-362

CVSS2 => (AV:N/AC:H/Au:N/C:N/I:N/A:P)

CVSS Base Score
Impact Subscore
Exploitability Subscore
2.6/10
2.9/10
4.9/10
Exploit range
Attack complexity
Authentication
Remote
High
No required
Confidentiality impact
Integrity impact
Availability impact
None
None
Partial
Affected software
Oracle -> Solaris 
Opensuse -> LEAP 
Opensuse -> Opensuse 
NTP -> NTP 
Novell -> LEAP 
Novell -> Opensuse 
Novell -> Suse linux enterprise debuginfo 
Novell -> Suse linux enterprise desktop 
Novell -> Suse linux enterprise server 
Novell -> Suse manager 
Novell -> Suse manager proxy 
Novell -> Suse openstack cloud 

 References:
http://bugs.ntp.org/3043
http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00018.html
http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00023.html
http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00024.html
http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00028.html
http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00040.html
http://support.ntp.org/bin/view/Main/NtpBug3043
http://support.ntp.org/bin/view/Main/SecurityNotice
http://www.kb.cert.org/vuls/id/321640
http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html
http://www.securityfocus.com/bid/91007
http://www.securitytracker.com/id/1036037
https://security.FreeBSD.org/advisories/FreeBSD-SA-16:24.ntp.asc
https://security.gentoo.org/glsa/201607-15
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