Critical severity · published Aug 7, 2017
CVE-2015-7871
Crypto-NAK packets in ntpd in NTP 4.2.x before 4.2.8p4, and 4.3.x before 4.3.77 allows remote attackers to bypass authentication
9.8
CVSS
81.8%
EPSS
No
On KEV
Description
Crypto-NAK packets in ntpd in NTP 4.2.x before 4.2.8p4, and 4.3.x before 4.3.77 allows remote attackers to bypass authentication.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)81.8% · higher than 100% 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
DO
Data Ontap · Netapp
All versions, or not specified · source: NVD
DL
Debian Linux · Debian
7.0; 8.0; 9.0 · source: NVD
NT
Ntp · Ntp
4.2.6 before 4.2.8; 4.3.0 before 4.3.77; 4.2.5; 4.2.5; 4.2.5; 4.2.5; +34 more · source: NVD
OB
Oncommand Balance · Netapp
All versions, or not specified · source: NVD
OP
Oncommand Performance Manager · Netapp
All versions, or not specified · source: NVD
OU
Oncommand Unified Manager · Netapp
All versions, or not specified · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2015-7871
CVE.org
https://www.cve.org/CVERecord?id=CVE-2015-7871
Vendor Advisory
http://support.ntp.org/bin/view/Main/NtpBug2941
Third Party Advisory
http://www.debian.org/security/2015/dsa-3388
Third Party Advisory
http://www.securityfocus.com/bid/77287
Third Party Advisory
http://www.securitytracker.com/id/1033951
Issue Tracking
https://bugzilla.redhat.com/show_bug.cgi?id=1274265
cert-portal.siemens.com
https://cert-portal.siemens.com/productcert/pdf/ssa-497656.pdf
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