CVE-2015-7974

Public Exploit

Description

NTP 4.x before 4.2.8p6 and 4.3.x before 4.3.90 do not verify peer associations of symmetric keys when authenticating packets, which might allow remote attackers to conduct impersonation attacks via an arbitrary trusted key, aka a "skeleton key."

Category

7.7
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 6.48% Top 10%
Vendor Advisory debian.org Vendor Advisory redhat.com Vendor Advisory FreeBSD.org Vendor Advisory gentoo.org Vendor Advisory ntp.org Vendor Advisory ntp.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
http://www.talosintel.com/reports/TALOS-2016-0071/ third party advisory exploit
http://www.debian.org/security/2016/dsa-3629 third party advisory vendor advisory
http://www.securityfocus.com/bid/81960 vdb entry third party advisory
https://h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03766en_us third party advisory
http://support.ntp.org/bin/view/Main/NtpBug2936 vendor advisory
http://www.securitytracker.com/id/1034782 vdb entry third party advisory
https://h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03750en_us third party advisory
http://rhn.redhat.com/errata/RHSA-2016-2583.html third party advisory vendor advisory
https://security.netapp.com/advisory/ntap-20171031-0001/ third party advisory
http://bugs.ntp.org/show_bug.cgi?id=2936 issue tracking vendor advisory
https://security.FreeBSD.org/advisories/FreeBSD-SA-16:09.ntp.asc third party advisory vendor advisory
https://security.gentoo.org/glsa/201607-15 third party advisory vendor advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-497656.pdf third party advisory
https://us-cert.cisa.gov/ics/advisories/icsa-21-103-11 third party advisory us government resource

Frequently Asked Questions

What is the severity of CVE-2015-7974?
CVE-2015-7974 has been scored as a high severity vulnerability.
How to fix CVE-2015-7974?
To fix CVE-2015-7974, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2015-7974 being actively exploited in the wild?
It is possible that CVE-2015-7974 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~6% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.
© 2025 Under My Watch. All Rights Reserved.