Vulnerabilities
Misconfiguration
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CVE Vulnerabilities

CVE-2016-7428

Uncontrolled Resource Consumption

Published: Jan 13, 2017 | Modified: Apr 20, 2025
CVSS 3.x
4.3
MEDIUM
Source:
NVD
CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
CVSS 2.x
3.3 LOW
AV:A/AC:L/Au:N/C:N/I:N/A:P
RedHat/V2
3.3 LOW
AV:A/AC:L/Au:N/C:N/I:N/A:P
RedHat/V3
4.3 LOW
CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Ubuntu
LOW
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Additional information
NVDhttps://nvd.nist.gov/vuln/detail/CVE-2016-7428
CWEhttps://cwe.mitre.org/data/definitions/400.html

ntpd in NTP before 4.2.8p9 allows remote attackers to cause a denial of service (reject broadcast mode packets) via the poll interval in a broadcast packet.

Weakness

The product does not properly control the allocation and maintenance of a limited resource.

Affected Software

NameVendorStart VersionEnd Version
NtpNtp4.2.8-p6 (including)4.2.8-p6 (including)
NtpNtp4.2.8-p7 (including)4.2.8-p7 (including)
NtpNtp4.2.8-p8 (including)4.2.8-p8 (including)
NtpUbuntuesm-infra-legacy/trusty*
NtpUbuntuesm-infra/xenial*
NtpUbuntuprecise*
NtpUbuntutrusty*
NtpUbuntutrusty/esm*
NtpUbuntuupstream*
NtpUbuntuvivid/stable-phone-overlay*
NtpUbuntuxenial*
NtpUbuntuyakkety*

Potential Mitigations

  • Mitigation of resource exhaustion attacks requires that the target system either:

  • The first of these solutions is an issue in itself though, since it may allow attackers to prevent the use of the system by a particular valid user. If the attacker impersonates the valid user, they may be able to prevent the user from accessing the server in question.

  • The second solution is simply difficult to effectively institute – and even when properly done, it does not provide a full solution. It simply makes the attack require more resources on the part of the attacker.

References

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