CVE-2015-7871
9.8
CRITICAL · CVSS 3.1 · EPSS 81.8% (pctl 100)
Patch early
EPSS 81.8% — above the 10% action threshold.
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.
Scoring
| CVSS | 9.8 (CRITICAL, v3.1) |
|---|---|
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| EPSS | 81.76% — more likely to be exploited than 100% of all CVEs |
| Weakness | CWE-287 |
| On CISA KEV | no |
| Public exploit | none known |
| Published | 2017-08-07 |
| Last modified | 2026-06-17 |
Affected (7)
| Vendor | Product |
|---|---|
| debian | debian linux |
| netapp | clustered data ontap |
| netapp | data ontap |
| netapp | oncommand balance |
| netapp | oncommand performance manager |
| netapp | oncommand unified manager |
| ntp | ntp |
References
- http://support.ntp.org/bin/view/Main/NtpBug2941
- http://www.debian.org/security/2015/dsa-3388
- http://www.securityfocus.com/bid/77287
- http://www.securitytracker.com/id/1033951
- https://bugzilla.redhat.com/show_bug.cgi?id=1274265
- https://cert-portal.siemens.com/productcert/pdf/ssa-497656.pdf
- https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05270839
- https://security.gentoo.org/glsa/201604-03
- https://security.gentoo.org/glsa/201607-15
- https://security.netapp.com/advisory/ntap-20171004-0001/
- http://support.ntp.org/bin/view/Main/NtpBug2941
- http://www.debian.org/security/2015/dsa-3388
- http://www.securityfocus.com/bid/77287
- http://www.securitytracker.com/id/1033951
- https://bugzilla.redhat.com/show_bug.cgi?id=1274265
- https://cert-portal.siemens.com/productcert/pdf/ssa-497656.pdf
- https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05270839
- https://security.gentoo.org/glsa/201604-03
- https://security.gentoo.org/glsa/201607-15
- https://security.netapp.com/advisory/ntap-20171004-0001/
→ the Explorer · watch your stack · NVD