CVE-2016-2516
UnknownEPSS 8.98%
Last modified
CVE-2016-2516 is a vulnerability of currently unknown severity. NTP before 4.2.8p7 and 4.3.x before 4.3.92, when mode7 is enabled, allows remote attackers to cause a denial of service (ntpd abort) by using the same IP address multiple times in an unconfig directive.. EPSS estimates a 8.98% chance of exploitation in the next 30 days.
Description
NTP before 4.2.8p7 and 4.3.x before 4.3.92, when mode7 is enabled, allows remote attackers to cause a denial of service (ntpd abort) by using the same IP address multiple times in an unconfig directive.
Metrics
Weakness Enumeration
Affected Software
| Vendor | Product | Versions | Update |
|---|---|---|---|
| Ntp | Ntp | <= 4.2.8 | P6 |
| Ntp | Ntp | 4.3.0 | — |
| Ntp | Ntp | 4.3.1 | — |
| Ntp | Ntp | 4.3.2 | — |
| Ntp | Ntp | 4.3.3 | — |
| Ntp | Ntp | 4.3.4 | — |
| Ntp | Ntp | 4.3.5 | — |
| Ntp | Ntp | 4.3.6 | — |
| Ntp | Ntp | 4.3.7 | — |
| Ntp | Ntp | 4.3.8 | — |
| Ntp | Ntp | 4.3.9 | — |
| Ntp | Ntp | 4.3.10 | — |
| Ntp | Ntp | 4.3.11 | — |
| Ntp | Ntp | 4.3.12 | — |
| Ntp | Ntp | 4.3.13 | — |
| Ntp | Ntp | 4.3.14 | — |
| Ntp | Ntp | 4.3.15 | — |
| Ntp | Ntp | 4.3.16 | — |
| Ntp | Ntp | 4.3.17 | — |
| Ntp | Ntp | 4.3.18 | — |
| Ntp | Ntp | 4.3.19 | — |
| Ntp | Ntp | 4.3.20 | — |
| Ntp | Ntp | 4.3.21 | — |
| Ntp | Ntp | 4.3.22 | — |
| Ntp | Ntp | 4.3.23 | — |
| Ntp | Ntp | 4.3.24 | — |
| Ntp | Ntp | 4.3.25 | — |
| Ntp | Ntp | 4.3.26 | — |
| Ntp | Ntp | 4.3.27 | — |
| Ntp | Ntp | 4.3.28 | — |
| Ntp | Ntp | 4.3.29 | — |
| Ntp | Ntp | 4.3.30 | — |
| Ntp | Ntp | 4.3.31 | — |
| Ntp | Ntp | 4.3.32 | — |
| Ntp | Ntp | 4.3.33 | — |
| Ntp | Ntp | 4.3.34 | — |
| Ntp | Ntp | 4.3.35 | — |
| Ntp | Ntp | 4.3.36 | — |
| Ntp | Ntp | 4.3.37 | — |
| Ntp | Ntp | 4.3.38 | — |
| Ntp | Ntp | 4.3.39 | — |
| Ntp | Ntp | 4.3.40 | — |
| Ntp | Ntp | 4.3.41 | — |
| Ntp | Ntp | 4.3.42 | — |
| Ntp | Ntp | 4.3.43 | — |
| Ntp | Ntp | 4.3.44 | — |
| Ntp | Ntp | 4.3.45 | — |
| Ntp | Ntp | 4.3.46 | — |
| Ntp | Ntp | 4.3.47 | — |
| Ntp | Ntp | 4.3.48 | — |
Showing 50 of 93 affected configurations. See NVD for the full list.
References
- http://support.ntp.org/bin/view/Main/NtpBug3011Vendor Advisory
- http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.htmlThird Party Advisory
- http://www.securityfocus.com/bid/88180Third Party Advisory, VDB Entry
- https://www.kb.cert.org/vuls/id/718152Third Party Advisory, US Government Resource
- http://support.ntp.org/bin/view/Main/NtpBug3011Vendor Advisory
- http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.htmlThird Party Advisory
- http://www.securityfocus.com/bid/88180Third Party Advisory, VDB Entry
- https://www.kb.cert.org/vuls/id/718152Third Party Advisory, US Government Resource
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2016-2516?
NTP before 4.2.8p7 and 4.3.x before 4.3.92, when mode7 is enabled, allows remote attackers to cause a denial of service (ntpd abort) by using the same IP address multiple times in an unconfig directive.
How severe is CVE-2016-2516?
Severity scoring for CVE-2016-2516 is pending analysis. The EPSS model estimates a 8.98% probability of exploitation in the next 30 days.
How do I fix CVE-2016-2516?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2016
- CVE-2016-2509The password-sync feature on Belden Hirschmann Classic Platf…
- CVE-2016-2510BeanShell (bsh) before 2.0b6, when included on the classpath…8.1
- CVE-2016-2511Cross-site scripting (XSS) vulnerability in WebSVN 2.3.3 and…
- CVE-2016-2512The utils.http.is_safe_url function in Django before 1.8.10 …
- CVE-2016-2513The password hasher in contrib/auth/hashers.py in Django bef…
- CVE-2016-2515Hawk before 3.1.3 and 4.x before 4.1.1 allow remote attacker…
- CVE-2016-2517NTP before 4.2.8p7 and 4.3.x before 4.3.92 allows remote att…
- CVE-2016-2518The MATCH_ASSOC function in NTP before version 4.2.8p9 and 4…5.3
- CVE-2016-2519ntpd in NTP before 4.2.8p7 and 4.3.x before 4.3.92 allows re…
- CVE-2016-2521Untrusted search path vulnerability in the WiresharkApplicat…
- CVE-2016-2522The dissect_ber_constrained_bitstring function in epan/disse…
- CVE-2016-2523The dnp3_al_process_object function in epan/dissectors/packe…
Are you affected by CVE-2016-2516?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST