CVE-2015-7978
CVE-2015-7978 is a high-severity vulnerability in Ntp with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-400.
Key facts
- Severity: High (CVSS 3.x base score 7.5)
- CVSS v2: 5.0
- EPSS exploit prediction: 10% (95th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-400
- Affected product: Ntp
- Published:
- Last modified:
Description
NTP before 4.2.8p6 and 4.3.0 before 4.3.90 allows a remote attackers to cause a denial of service (stack exhaustion) via an ntpdc relist command, which triggers recursive traversal of the restriction list.
Frequently asked questions
- What is CVE-2015-7978?
- NTP before 4.2.8p6 and 4.3.0 before 4.3.90 allows a remote attackers to cause a denial of service (stack exhaustion) via an ntpdc relist command, which triggers recursive traversal of the restriction list.
- How severe is CVE-2015-7978?
- CVE-2015-7978 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
- Is CVE-2015-7978 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 10% (95th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2015-7978?
- CVE-2015-7978 primarily affects Ntp. In total, 90 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
- How do I fix CVE-2015-7978?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- When was CVE-2015-7978 published?
- CVE-2015-7978 was published on 2017-01-30 and last updated on 2026-06-17.
References
- http://lists.fedoraproject.org/pipermail/package-announce/2016-February/177507.html
- http://lists.fedoraproject.org/pipermail/package-announce/2016-January/176434.html
- http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00059.html
- http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00060.html
- http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00020.html
- http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00038.html
- http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00048.html
- http://lists.opensuse.org/opensuse-security-announce/2016-07/msg00026.html
- http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00042.html
- http://lists.opensuse.org/opensuse-updates/2016-05/msg00114.html
- http://rhn.redhat.com/errata/RHSA-2016-0780.html
- http://rhn.redhat.com/errata/RHSA-2016-2583.html
- http://support.ntp.org/bin/view/Main/SecurityNotice#April_2016_NTP_4_2_8p7_Security
- http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160127-ntpd
- http://www.debian.org/security/2016/dsa-3629
- http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html
- http://www.securityfocus.com/bid/81962
- http://www.securitytracker.com/id/1034782
- http://www.ubuntu.com/usn/USN-3096-1
- https://bto.bluecoat.com/security-advisory/sa113
- https://security.FreeBSD.org/advisories/FreeBSD-SA-16:09.ntp.asc
- https://security.gentoo.org/glsa/201607-15
- https://security.netapp.com/advisory/ntap-20171031-0001/
- https://www.kb.cert.org/vuls/id/718152
Affected products (90)
- cpe:2.3:a:ntp:ntp:*:p5:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.0:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.1:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.2:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.3:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.4:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.5:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.6:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.7:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.8:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.10:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.11:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.12:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.13:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.14:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.15:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.16:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.17:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.18:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.19:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.20:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.21:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.22:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.23:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.24:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.25:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.26:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.27:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.28:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.29:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.30:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.31:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.32:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.33:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.34:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.35:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.36:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.37:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.38:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.3.39:*:*:*:*:*:*:*
More vulnerabilities in Ntp
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Browse all CWE-400 (Uncontrolled Resource Consumption) vulnerabilities →
Threat intelligence
Threat-intel indicators referencing this CVE:
- 197.248.207.139 (ipv4-addr)
- 135.129.128.247 (ipv4-addr)
- 119.201.59.224 (ipv4-addr)
- 125.212.244.35 (ipv4-addr)
- 202.29.220.126 (ipv4-addr)
- 93.42.227.251 (ipv4-addr)
- 82.209.191.11 (ipv4-addr)
- 119.204.60.250 (ipv4-addr)