CVE-2015-5300
7.5 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
7.5 High
AI Score
Confidence
High
5 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:N/I:N/A:P
0.021 Low
EPSS
Percentile
89.0%
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).
References
aix.software.ibm.com/aix/efixes/security/ntp_advisory5.asc
lists.fedoraproject.org/pipermail/package-announce/2015-November/170684.html
lists.fedoraproject.org/pipermail/package-announce/2015-November/170926.html
lists.fedoraproject.org/pipermail/package-announce/2016-February/177507.html
lists.opensuse.org/opensuse-security-announce/2016-04/msg00059.html
lists.opensuse.org/opensuse-security-announce/2016-04/msg00060.html
lists.opensuse.org/opensuse-security-announce/2016-05/msg00020.html
lists.opensuse.org/opensuse-security-announce/2016-05/msg00038.html
lists.opensuse.org/opensuse-security-announce/2016-05/msg00048.html
lists.opensuse.org/opensuse-security-announce/2016-07/msg00026.html
lists.opensuse.org/opensuse-security-announce/2016-08/msg00042.html
lists.opensuse.org/opensuse-updates/2016-05/msg00114.html
rhn.redhat.com/errata/RHSA-2015-1930.html
seclists.org/bugtraq/2016/Feb/164
support.ntp.org/bin/view/Main/NtpBug2956
support.ntp.org/bin/view/Main/SecurityNotice#January_2016_NTP_4_2_8p5_Securit
www.debian.org/security/2015/dsa-3388
www.oracle.com/technetwork/security-advisory/cpujul2016-2881720.html
www.securityfocus.com/bid/77312
www.securitytracker.com/id/1034670
www.ubuntu.com/usn/USN-2783-1
bto.bluecoat.com/security-advisory/sa113
bugzilla.redhat.com/show_bug.cgi?id=1271076
ics-cert.us-cert.gov/advisories/ICSA-15-356-01
security.netapp.com/advisory/ntap-20171004-0001/
support.citrix.com/article/CTX220112
www-01.ibm.com/support/docview.wss?uid=isg3T1023885
www-01.ibm.com/support/docview.wss?uid=isg3T1024073
www-01.ibm.com/support/docview.wss?uid=nas8N1021264
www-01.ibm.com/support/docview.wss?uid=ssg1S1005821
www-01.ibm.com/support/docview.wss?uid=swg21979393
www-01.ibm.com/support/docview.wss?uid=swg21980676
www-01.ibm.com/support/docview.wss?uid=swg21983501
www-01.ibm.com/support/docview.wss?uid=swg21983506
www.cs.bu.edu/~goldbe/NTPattack.html
www.freebsd.org/security/advisories/FreeBSD-SA-16:02.ntp.asc
www.ibm.com/support/home/docdisplay?lndocid=migr-5099428
www.oracle.com/technetwork/topics/security/bulletinjan2016-2867206.html
www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html
Related
7.5 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
7.5 High
AI Score
Confidence
High
5 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:N/I:N/A:P
0.021 Low
EPSS
Percentile
89.0%