Description

The panic_gate check in NTP before 4.2.8p5 is only re-enabled after the first change to the system clock that was greater than 128 milliseconds by default, which allows remote attackers to set NTP to an arbitrary time when started with the -g option, or to alter the time by up to 900 seconds otherwise by responding to an unspecified number of requests from trusted sources, and leveraging a resulting denial of service (abort and restart).

Metrics

CVSS 3.0 7.5/10CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-361

Affected software

Vendor	Product	Versions
n/a	n/a	n/a

References

http://aix.software.ibm.com/aix/efixes/security/ntp_advisory5.ascThird Party Advisory
http://lists.fedoraproject.org/pipermail/package-announce/2015-November/170684.htmlThird Party Advisory
http://lists.fedoraproject.org/pipermail/package-announce/2015-November/170926.htmlThird Party Advisory
http://lists.fedoraproject.org/pipermail/package-announce/2016-February/177507.htmlThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00059.htmlThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00060.htmlThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00020.htmlThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00038.htmlThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00048.htmlThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-07/msg00026.htmlThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00042.htmlThird Party Advisory
http://lists.opensuse.org/opensuse-updates/2016-05/msg00114.htmlThird Party Advisory
http://rhn.redhat.com/errata/RHSA-2015-1930.htmlThird Party Advisory
http://seclists.org/bugtraq/2016/Feb/164Mailing List, Third Party Advisory
http://support.ntp.org/bin/view/Main/NtpBug2956Issue Tracking, Patch, Vendor Advisory
http://support.ntp.org/bin/view/Main/SecurityNotice#January_2016_NTP_4_2_8p5_SecuritIssue Tracking, Patch, Vendor Advisory
http://www.debian.org/security/2015/dsa-3388Third Party Advisory
http://www.oracle.com/technetwork/security-advisory/cpujul2016-2881720.htmlThird Party Advisory
http://www.securityfocus.com/bid/77312Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1034670Third Party Advisory, VDB Entry
http://www.ubuntu.com/usn/USN-2783-1Third Party Advisory
https://bto.bluecoat.com/security-advisory/sa113Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1271076Issue Tracking
https://ics-cert.us-cert.gov/advisories/ICSA-15-356-01Third Party Advisory, US Government Resource
https://security.netapp.com/advisory/ntap-20171004-0001/
https://support.citrix.com/article/CTX220112Third Party Advisory
https://www-01.ibm.com/support/docview.wss?uid=isg3T1023885Third Party Advisory
https://www-01.ibm.com/support/docview.wss?uid=isg3T1024073Third Party Advisory
https://www-01.ibm.com/support/docview.wss?uid=nas8N1021264Third Party Advisory
https://www-01.ibm.com/support/docview.wss?uid=ssg1S1005821Third Party Advisory
https://www-01.ibm.com/support/docview.wss?uid=swg21979393Third Party Advisory
https://www-01.ibm.com/support/docview.wss?uid=swg21980676Third Party Advisory
https://www-01.ibm.com/support/docview.wss?uid=swg21983501Third Party Advisory
https://www-01.ibm.com/support/docview.wss?uid=swg21983506Third Party Advisory
https://www.cs.bu.edu/~goldbe/NTPattack.htmlThird Party Advisory
https://www.freebsd.org/security/advisories/FreeBSD-SA-16:02.ntp.ascThird Party Advisory
https://www.ibm.com/support/home/docdisplay?lndocid=migr-5099428Third Party Advisory
https://www.oracle.com/technetwork/topics/security/bulletinjan2016-2867206.htmlThird Party Advisory
https://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.htmlThird Party Advisory
http://aix.software.ibm.com/aix/efixes/security/ntp_advisory5.ascThird Party Advisory
http://lists.fedoraproject.org/pipermail/package-announce/2015-November/170684.htmlThird Party Advisory
http://lists.fedoraproject.org/pipermail/package-announce/2015-November/170926.htmlThird Party Advisory
http://lists.fedoraproject.org/pipermail/package-announce/2016-February/177507.htmlThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00059.htmlThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00060.htmlThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00020.htmlThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00038.htmlThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00048.htmlThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-07/msg00026.htmlThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00042.htmlThird Party Advisory
http://lists.opensuse.org/opensuse-updates/2016-05/msg00114.htmlThird Party Advisory
http://rhn.redhat.com/errata/RHSA-2015-1930.htmlThird Party Advisory
http://seclists.org/bugtraq/2016/Feb/164Mailing List, Third Party Advisory
http://support.ntp.org/bin/view/Main/NtpBug2956Issue Tracking, Patch, Vendor Advisory
http://support.ntp.org/bin/view/Main/SecurityNotice#January_2016_NTP_4_2_8p5_SecuritIssue Tracking, Patch, Vendor Advisory
http://www.debian.org/security/2015/dsa-3388Third Party Advisory
http://www.oracle.com/technetwork/security-advisory/cpujul2016-2881720.htmlThird Party Advisory
http://www.securityfocus.com/bid/77312Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1034670Third Party Advisory, VDB Entry
http://www.ubuntu.com/usn/USN-2783-1Third Party Advisory

Timeline

Published: Jul 21, 2017
Last modified: Jun 17, 2026
NVD status: Modified

CVE-2015-5300