Vulnerability Monitor

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CVE-2015-7973

NTP before 4.2.8p6 and 4.3.x before 4.3.90, when configured in broadcast mode, allows man-in-the-middle attackers to conduct replay attacks by sniffing the network.

Security Impact Summary

This vulnerability carries a MEDIUM severity rating with a CVSS v3.1 score of 6.5, indicating it can be exploited remotely over the network but requires specific conditions to be met without requiring user interaction and does not require pre-existing privileges . The vulnerability impacts limited integrity, and availability (service disruption) for affected systems. Impacting 9 products from ntp, from siemens, from siemens and 6 others, organizations running these solutions should prioritize assessment and patching.

Historical Context

First disclosed in 2017, this vulnerability was reported during a period defined by widespread IoT adoption challenges, mobile security concerns, and the emergence of advanced persistent threat (APT) techniques. Contemporary mitigation strategies focused on secure development practices and third-party component vetting.

Published

2017-01-30T21:59:00.143

Last Modified

2025-04-20T01:37:25.860

Status

Deferred

Source

[email protected]

Severity

CVSSv3.1: 6.5 (MEDIUM)

CVSSv2 Vector

AV:N/AC:M/Au:N/C:N/I:P/A:P

Access Vector: NETWORK
Access Complexity: MEDIUM
Authentication: NONE
Confidentiality Impact: NONE
Integrity Impact: PARTIAL
Availability Impact: PARTIAL

Exploitability Score

8.6

Impact Score

4.9

Weaknesses

Type: Primary
CWE-254

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	ntp	ntp	< 4.2.8	Yes
Application	ntp	ntp	< 4.3.90	Yes
Application	ntp	ntp	4.2.8	Yes
Application	ntp	ntp	4.2.8	Yes
Application	ntp	ntp	4.2.8	Yes
Application	ntp	ntp	4.2.8	Yes
Application	ntp	ntp	4.2.8	Yes
Application	ntp	ntp	4.2.8	Yes
Application	ntp	ntp	4.2.8	Yes
Application	ntp	ntp	4.2.8	Yes
Application	ntp	ntp	4.2.8	Yes
Application	ntp	ntp	4.2.8	Yes
Application	ntp	ntp	4.2.8	Yes
Application	ntp	ntp	4.2.8	Yes
Application	ntp	ntp	4.2.8	Yes
Application	ntp	ntp	4.2.8	Yes
Application	ntp	ntp	4.2.8	Yes
Application	ntp	ntp	4.2.8	Yes
Application	ntp	ntp	4.2.8	Yes
Application	ntp	ntp	4.2.8	Yes
Application	ntp	ntp	4.2.8	Yes
Operating System	siemens	tim_4r-ie_firmware	*	Yes
Hardware	siemens	tim_4r-ie	-	No
Operating System	siemens	tim_4r-ie_dnp3_firmware	*	Yes
Hardware	siemens	tim_4r-ie_dnp3	-	No
Operating System	freebsd	freebsd	< 10.1	Yes
Operating System	freebsd	freebsd	9.3	Yes
Operating System	freebsd	freebsd	9.3	Yes
Operating System	freebsd	freebsd	9.3	Yes
Operating System	freebsd	freebsd	9.3	Yes
Operating System	freebsd	freebsd	9.3	Yes
Operating System	freebsd	freebsd	9.3	Yes
Operating System	freebsd	freebsd	9.3	Yes
Operating System	freebsd	freebsd	9.3	Yes
Operating System	freebsd	freebsd	9.3	Yes
Operating System	freebsd	freebsd	9.3	Yes
Operating System	freebsd	freebsd	9.3	Yes
Operating System	freebsd	freebsd	9.3	Yes
Operating System	freebsd	freebsd	9.3	Yes
Operating System	freebsd	freebsd	9.3	Yes
Operating System	freebsd	freebsd	9.3	Yes
Operating System	freebsd	freebsd	9.3	Yes
Operating System	freebsd	freebsd	9.3	Yes
Operating System	freebsd	freebsd	9.3	Yes
Operating System	freebsd	freebsd	9.3	Yes
Operating System	freebsd	freebsd	9.3	Yes
Operating System	freebsd	freebsd	10.1	Yes
Operating System	freebsd	freebsd	10.1	Yes
Operating System	freebsd	freebsd	10.1	Yes
Operating System	freebsd	freebsd	10.1	Yes
Operating System	freebsd	freebsd	10.1	Yes
Operating System	freebsd	freebsd	10.1	Yes
Operating System	freebsd	freebsd	10.1	Yes
Operating System	freebsd	freebsd	10.1	Yes
Operating System	freebsd	freebsd	10.1	Yes
Operating System	freebsd	freebsd	10.1	Yes
Operating System	freebsd	freebsd	10.1	Yes
Operating System	freebsd	freebsd	10.1	Yes
Operating System	freebsd	freebsd	10.1	Yes
Operating System	freebsd	freebsd	10.1	Yes
Operating System	freebsd	freebsd	10.1	Yes
Operating System	freebsd	freebsd	10.1	Yes
Operating System	freebsd	freebsd	10.1	Yes
Operating System	freebsd	freebsd	10.1	Yes
Operating System	freebsd	freebsd	10.1	Yes
Operating System	freebsd	freebsd	10.1	Yes
Operating System	freebsd	freebsd	10.1	Yes
Operating System	freebsd	freebsd	10.1	Yes
Operating System	freebsd	freebsd	10.2	Yes
Operating System	freebsd	freebsd	10.2	Yes
Operating System	freebsd	freebsd	10.2	Yes
Operating System	freebsd	freebsd	10.2	Yes
Operating System	freebsd	freebsd	10.2	Yes
Operating System	freebsd	freebsd	10.2	Yes
Operating System	freebsd	freebsd	10.2	Yes
Operating System	freebsd	freebsd	10.2	Yes
Application	netapp	clustered_data_ontap	-	Yes
Application	netapp	oncommand_balance	-	Yes
Operating System	canonical	ubuntu_linux	12.04	Yes
Operating System	canonical	ubuntu_linux	14.04	Yes
Operating System	canonical	ubuntu_linux	16.04	Yes

References

http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00059.html Broken Link ([email protected])
http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00060.html Broken Link ([email protected])
http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00020.html Broken Link ([email protected])
http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00038.html Broken Link ([email protected])
http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00048.html Broken Link ([email protected])
http://lists.opensuse.org/opensuse-security-announce/2016-07/msg00026.html Broken Link ([email protected])
http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00042.html Broken Link ([email protected])
http://lists.opensuse.org/opensuse-updates/2016-05/msg00114.html Broken Link ([email protected])
http://support.ntp.org/bin/view/Main/NtpBug2935 Vendor Advisory ([email protected])
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160127-ntpd Third Party Advisory ([email protected])
http://www.securityfocus.com/bid/81963 Third Party Advisory, VDB Entry ([email protected])
http://www.securitytracker.com/id/1034782 Third Party Advisory, VDB Entry ([email protected])
http://www.ubuntu.com/usn/USN-3096-1 Third Party Advisory ([email protected])
https://bto.bluecoat.com/security-advisory/sa113 Third Party Advisory ([email protected])
https://cert-portal.siemens.com/productcert/pdf/ssa-497656.pdf Third Party Advisory ([email protected])
https://h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03750en_us Third Party Advisory ([email protected])
https://h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03766en_us Third Party Advisory ([email protected])
https://security.FreeBSD.org/advisories/FreeBSD-SA-16:09.ntp.asc Third Party Advisory ([email protected])
https://security.gentoo.org/glsa/201607-15 Third Party Advisory ([email protected])
https://security.netapp.com/advisory/ntap-20171031-0001/ Third Party Advisory ([email protected])
https://us-cert.cisa.gov/ics/advisories/icsa-21-103-11 Third Party Advisory, US Government Resource ([email protected])
https://www.kb.cert.org/vuls/id/718152 Third Party Advisory, US Government Resource ([email protected])
http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00059.html Broken Link (af854a3a-2127-422b-91ae-364da2661108)
http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00060.html Broken Link (af854a3a-2127-422b-91ae-364da2661108)
http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00020.html Broken Link (af854a3a-2127-422b-91ae-364da2661108)
http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00038.html Broken Link (af854a3a-2127-422b-91ae-364da2661108)
http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00048.html Broken Link (af854a3a-2127-422b-91ae-364da2661108)
http://lists.opensuse.org/opensuse-security-announce/2016-07/msg00026.html Broken Link (af854a3a-2127-422b-91ae-364da2661108)
http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00042.html Broken Link (af854a3a-2127-422b-91ae-364da2661108)
http://lists.opensuse.org/opensuse-updates/2016-05/msg00114.html Broken Link (af854a3a-2127-422b-91ae-364da2661108)
http://support.ntp.org/bin/view/Main/NtpBug2935 Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160127-ntpd Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://www.securityfocus.com/bid/81963 Third Party Advisory, VDB Entry (af854a3a-2127-422b-91ae-364da2661108)
http://www.securitytracker.com/id/1034782 Third Party Advisory, VDB Entry (af854a3a-2127-422b-91ae-364da2661108)
http://www.ubuntu.com/usn/USN-3096-1 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://bto.bluecoat.com/security-advisory/sa113 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://cert-portal.siemens.com/productcert/pdf/ssa-497656.pdf Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03750en_us Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03766en_us Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://security.FreeBSD.org/advisories/FreeBSD-SA-16:09.ntp.asc Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://security.gentoo.org/glsa/201607-15 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://security.netapp.com/advisory/ntap-20171031-0001/ Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://us-cert.cisa.gov/ics/advisories/icsa-21-103-11 Third Party Advisory, US Government Resource (af854a3a-2127-422b-91ae-364da2661108)
https://www.kb.cert.org/vuls/id/718152 Third Party Advisory, US Government Resource (af854a3a-2127-422b-91ae-364da2661108)

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For ntp's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.