CVE-2015-5300

high-risk
Published 2017-07-21

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).

Do I need to act?

!
36.8% chance of exploitation in next 30 days
EPSS score — higher than 63% of all CVEs
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
7
CVSS 7.5/10 High
NETWORK / LOW complexity

Affected Products (20)

Affected Vendors

Ntp Debian Canonical Redhat Opensuse Fedoraproject Suse

References (78)

Third Party Advisory http://aix.software.ibm.com/aix/efixes/security/ntp_advisory5.asc
Third Party Advisory http://lists.fedoraproject.org/pipermail/package-announce/2015-November/170684.h...
Third Party Advisory http://lists.fedoraproject.org/pipermail/package-announce/2015-November/170926.h...
Third Party Advisory http://lists.fedoraproject.org/pipermail/package-announce/2016-February/177507.h...
Third Party Advisory http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00059.html
Third Party Advisory http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00060.html
Third Party Advisory http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00020.html
Third Party Advisory http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00038.html
Third Party Advisory http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00048.html
Third Party Advisory http://lists.opensuse.org/opensuse-security-announce/2016-07/msg00026.html
Third Party Advisory http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00042.html
Third Party Advisory http://lists.opensuse.org/opensuse-updates/2016-05/msg00114.html
Third Party Advisory http://rhn.redhat.com/errata/RHSA-2015-1930.html
Mailing List http://seclists.org/bugtraq/2016/Feb/164
Issue Tracking http://support.ntp.org/bin/view/Main/NtpBug2956
Issue Tracking http://support.ntp.org/bin/view/Main/SecurityNotice#January_2016_NTP_4_2_8p5_Sec...
Third Party Advisory http://www.debian.org/security/2015/dsa-3388
Third Party Advisory http://www.oracle.com/technetwork/security-advisory/cpujul2016-2881720.html
Third Party Advisory http://www.securityfocus.com/bid/77312
Third Party Advisory http://www.securitytracker.com/id/1034670
and 58 more references
66
/ 100
high-risk
Severity 26/34 · High
Exploitability 16/34 · Moderate
Exposure 24/34 · High