High severity · published Jan 26, 2016
CVE-2015-7974
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…
7.7
CVSS
5.7%
EPSS
No
On KEV
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."
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
High
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)5.7% · higher than 93% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
CD
Clustered Data Ontap · Netapp
All versions, or not specified · source: NVD
DL
Debian Linux · Debian
8.0; 9.0 · source: NVD
NT
Ntp · Ntp
4.2.0 before 4.2.8; 4.3.0 before 4.3.90; 4.2.8; 4.2.8; 4.2.8; 4.2.8; +15 more · source: NVD
OB
Oncommand Balance · Netapp
All versions, or not specified · source: NVD
T4
Tim 4r-ie Dnp3 Firmware · Siemens
All versions, or not specified · source: NVD
T4
Tim 4r-ie Firmware · Siemens
All versions, or not specified · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2015-7974
CVE.org
https://www.cve.org/CVERecord?id=CVE-2015-7974
Issue Tracking
http://bugs.ntp.org/show_bug.cgi?id=2936
Third Party Advisory
http://rhn.redhat.com/errata/RHSA-2016-2583.html
Vendor Advisory
http://support.ntp.org/bin/view/Main/NtpBug2936
Third Party Advisory
http://www.debian.org/security/2016/dsa-3629
Third Party Advisory
http://www.securityfocus.com/bid/81960
Third Party Advisory
http://www.securitytracker.com/id/1034782
More from Debian Linux
10.0
CVE-2025-32433
Erlang/OTP SSH Vulnerable to Pre-Authentication RCE
10.0
CVE-2025-24201
Apple Multiple Products WebKit Out-of-Bounds Write Vulnerability
10.0
CVE-2021-44228
Apache Log4j2 JNDI features do not protect against attacker controlled LDAP and other JNDI related endpoints
10.0
CVE-2015-3306
ProFTPD Improper Access Control Vulnerability
9.8
CVE-2026-24061
GNU InetUtils Argument Injection Vulnerability