Modified
This vulnerability has been modified since it was last analyzed by the NVD. It is awaiting reanalysis which may result in further changes to the information provided.
Current Description
An attacker can spoof a packet from a legitimate ntpd server with an origin timestamp that matches the peer->dst timestamp recorded for that server. After making this switch, the client in NTP 4.2.8p4 and earlier and NTPSec aa48d001683e5b791a743ec9c575aaf7d867a2b0c will reject all future legitimate server responses. It is possible to force the victim client to move time after the mode has been changed. ntpq gives no indication that the mode has been switched.
Source:
MITRE
View Analysis Description
Analysis Description
An attacker can spoof a packet from a legitimate ntpd server with an origin timestamp that matches the peer->dst timestamp recorded for that server. After making this switch, the client in NTP 4.2.8p4 and earlier and NTPSec aa48d001683e5b791a743ec9c575aaf7d867a2b0c will reject all future legitimate server responses. It is possible to force the victim client to move time after the mode has been changed. ntpq gives no indication that the mode has been switched.
Source:
MITRE
Impact
CVSS v3.0 Severity and Metrics:
Base Score:
7.2 HIGH
Vector:
AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:L
(V3.0 legend)
Impact Score:
2.7
Exploitability Score:
3.9
Attack Vector (AV):
Network
Attack Complexity (AC):
Low
Privileges Required (PR):
None
User Interaction (UI):
None
Scope (S):
Changed
Confidentiality (C):
None
Integrity (I):
Low
Availability (A):
Low
CVSS v2.0 Severity and Metrics:
Base Score:
6.4 MEDIUM
Vector:
(AV:N/AC:L/Au:N/C:N/I:P/A:P)
(V2 legend)
Impact Subscore:
4.9
Exploitability Subscore:
10.0
Access Vector (AV):
Network
Access Complexity (AC):
Low
Authentication (AU):
None
Confidentiality (C):
None
Integrity (I):
Partial
Availability (A):
Partial
Additional Information:
Allows unauthorized modification
Allows disruption of service
References to Advisories, Solutions, and Tools
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Change History
8 change records found
- show changes
CVE Modified by MITRE -
1/4/2018 9:30:34 PM
| Action |
Type |
Old Value |
New Value |
| Added |
Reference |
|
http://rhn.redhat.com/errata/RHSA-2016-1552.html [No Types Assigned] |
| Added |
Reference |
|
https://access.redhat.com/errata/RHSA-2016:1141 [No Types Assigned] |
CVE Modified by MITRE -
11/20/2017 9:29:03 PM
| Action |
Type |
Old Value |
New Value |
| Added |
Reference |
|
https://security.FreeBSD.org/advisories/FreeBSD-SA-16:16.ntp.asc [No Types Assigned] |
CVE Modified by MITRE -
11/9/2017 9:29:07 PM
| Action |
Type |
Old Value |
New Value |
| Added |
Reference |
|
https://security.netapp.com/advisory/ntap-20171004-0002/ [No Types Assigned] |
CVE Modified by MITRE -
11/3/2017 9:29:17 PM
| Action |
Type |
Old Value |
New Value |
| Added |
Reference |
|
http://www.debian.org/security/2016/dsa-3629 [No Types Assigned] |
CVE Modified by MITRE -
9/2/2017 9:29:03 PM
| Action |
Type |
Old Value |
New Value |
| Added |
Reference |
|
http://www.securitytracker.com/id/1035705 [No Types Assigned] |
CVE Modified by MITRE -
6/30/2017 9:29:34 PM
| Action |
Type |
Old Value |
New Value |
| Added |
Reference |
|
https://security.gentoo.org/glsa/201607-15 [No Types Assigned] |
CVE Modified by MITRE -
1/10/2017 9:59:05 PM
| Action |
Type |
Old Value |
New Value |
| Added |
Reference |
|
http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html [No Types Assigned] |
| Added |
Reference |
|
http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html [No Types Assigned] |
| Added |
Reference |
|
http://www.securityfocus.com/bid/88264 [No Types Assigned] |
Initial Analysis -
1/10/2017 8:46:16 AM
| Action |
Type |
Old Value |
New Value |
| Added |
CPE Configuration |
|
OR
*cpe:2.3:a:ntp:ntp:4.2.8:p4:*:*:*:*:*:* |
| Added |
CVSS V2 |
|
(AV:N/AC:L/Au:N/C:N/I:P/A:P) |
| Added |
CVSS V3 |
|
AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:L |
| Added |
CWE |
|
CWE-19 |
| Changed |
Reference Type |
http://www.talosintelligence.com/reports/TALOS-2016-0082/ No Types Assigned |
http://www.talosintelligence.com/reports/TALOS-2016-0082/ Third Party Advisory, Exploit |