CVE Vulnerabilities

CVE-2015-7978

Uncontrolled Resource Consumption

Published: Jan 30, 2017 | Modified: Apr 20, 2025
CVSS 3.x
7.5
HIGH
Source:
NVD
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 2.x
5 MEDIUM
AV:N/AC:L/Au:N/C:N/I:N/A:P
RedHat/V2
4.3 MODERATE
AV:N/AC:M/Au:N/C:N/I:N/A:P
RedHat/V3
Ubuntu
MEDIUM

NTP before 4.2.8p6 and 4.3.0 before 4.3.90 allows a remote attackers to cause a denial of service (stack exhaustion) via an ntpdc relist command, which triggers recursive traversal of the restriction list.

Weakness

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

Affected Software

Name Vendor Start Version End Version
Ntp Ntp * 4.2.8 (including)
Ntp Ntp 4.3.0 (including) 4.3.0 (including)
Ntp Ntp 4.3.1 (including) 4.3.1 (including)
Ntp Ntp 4.3.2 (including) 4.3.2 (including)
Ntp Ntp 4.3.3 (including) 4.3.3 (including)
Ntp Ntp 4.3.4 (including) 4.3.4 (including)
Ntp Ntp 4.3.5 (including) 4.3.5 (including)
Ntp Ntp 4.3.6 (including) 4.3.6 (including)
Ntp Ntp 4.3.7 (including) 4.3.7 (including)
Ntp Ntp 4.3.8 (including) 4.3.8 (including)
Ntp Ntp 4.3.10 (including) 4.3.10 (including)
Ntp Ntp 4.3.11 (including) 4.3.11 (including)
Ntp Ntp 4.3.12 (including) 4.3.12 (including)
Ntp Ntp 4.3.13 (including) 4.3.13 (including)
Ntp Ntp 4.3.14 (including) 4.3.14 (including)
Ntp Ntp 4.3.15 (including) 4.3.15 (including)
Ntp Ntp 4.3.16 (including) 4.3.16 (including)
Ntp Ntp 4.3.17 (including) 4.3.17 (including)
Ntp Ntp 4.3.18 (including) 4.3.18 (including)
Ntp Ntp 4.3.19 (including) 4.3.19 (including)
Ntp Ntp 4.3.20 (including) 4.3.20 (including)
Ntp Ntp 4.3.21 (including) 4.3.21 (including)
Ntp Ntp 4.3.22 (including) 4.3.22 (including)
Ntp Ntp 4.3.23 (including) 4.3.23 (including)
Ntp Ntp 4.3.24 (including) 4.3.24 (including)
Ntp Ntp 4.3.25 (including) 4.3.25 (including)
Ntp Ntp 4.3.26 (including) 4.3.26 (including)
Ntp Ntp 4.3.27 (including) 4.3.27 (including)
Ntp Ntp 4.3.28 (including) 4.3.28 (including)
Ntp Ntp 4.3.29 (including) 4.3.29 (including)
Ntp Ntp 4.3.30 (including) 4.3.30 (including)
Ntp Ntp 4.3.31 (including) 4.3.31 (including)
Ntp Ntp 4.3.32 (including) 4.3.32 (including)
Ntp Ntp 4.3.33 (including) 4.3.33 (including)
Ntp Ntp 4.3.34 (including) 4.3.34 (including)
Ntp Ntp 4.3.35 (including) 4.3.35 (including)
Ntp Ntp 4.3.36 (including) 4.3.36 (including)
Ntp Ntp 4.3.37 (including) 4.3.37 (including)
Ntp Ntp 4.3.38 (including) 4.3.38 (including)
Ntp Ntp 4.3.39 (including) 4.3.39 (including)
Ntp Ntp 4.3.40 (including) 4.3.40 (including)
Ntp Ntp 4.3.41 (including) 4.3.41 (including)
Ntp Ntp 4.3.42 (including) 4.3.42 (including)
Ntp Ntp 4.3.43 (including) 4.3.43 (including)
Ntp Ntp 4.3.44 (including) 4.3.44 (including)
Ntp Ntp 4.3.45 (including) 4.3.45 (including)
Ntp Ntp 4.3.46 (including) 4.3.46 (including)
Ntp Ntp 4.3.47 (including) 4.3.47 (including)
Ntp Ntp 4.3.48 (including) 4.3.48 (including)
Ntp Ntp 4.3.49 (including) 4.3.49 (including)
Ntp Ntp 4.3.50 (including) 4.3.50 (including)
Ntp Ntp 4.3.51 (including) 4.3.51 (including)
Ntp Ntp 4.3.52 (including) 4.3.52 (including)
Ntp Ntp 4.3.53 (including) 4.3.53 (including)
Ntp Ntp 4.3.54 (including) 4.3.54 (including)
Ntp Ntp 4.3.55 (including) 4.3.55 (including)
Ntp Ntp 4.3.56 (including) 4.3.56 (including)
Ntp Ntp 4.3.57 (including) 4.3.57 (including)
Ntp Ntp 4.3.58 (including) 4.3.58 (including)
Ntp Ntp 4.3.59 (including) 4.3.59 (including)
Ntp Ntp 4.3.60 (including) 4.3.60 (including)
Ntp Ntp 4.3.61 (including) 4.3.61 (including)
Ntp Ntp 4.3.62 (including) 4.3.62 (including)
Ntp Ntp 4.3.63 (including) 4.3.63 (including)
Ntp Ntp 4.3.64 (including) 4.3.64 (including)
Ntp Ntp 4.3.65 (including) 4.3.65 (including)
Ntp Ntp 4.3.66 (including) 4.3.66 (including)
Ntp Ntp 4.3.67 (including) 4.3.67 (including)
Ntp Ntp 4.3.68 (including) 4.3.68 (including)
Ntp Ntp 4.3.69 (including) 4.3.69 (including)
Ntp Ntp 4.3.70 (including) 4.3.70 (including)
Ntp Ntp 4.3.71 (including) 4.3.71 (including)
Ntp Ntp 4.3.72 (including) 4.3.72 (including)
Ntp Ntp 4.3.73 (including) 4.3.73 (including)
Ntp Ntp 4.3.74 (including) 4.3.74 (including)
Ntp Ntp 4.3.75 (including) 4.3.75 (including)
Ntp Ntp 4.3.76 (including) 4.3.76 (including)
Ntp Ntp 4.3.77 (including) 4.3.77 (including)
Ntp Ntp 4.3.78 (including) 4.3.78 (including)
Ntp Ntp 4.3.79 (including) 4.3.79 (including)
Ntp Ntp 4.3.80 (including) 4.3.80 (including)
Ntp Ntp 4.3.81 (including) 4.3.81 (including)
Ntp Ntp 4.3.82 (including) 4.3.82 (including)
Ntp Ntp 4.3.83 (including) 4.3.83 (including)
Ntp Ntp 4.3.84 (including) 4.3.84 (including)
Ntp Ntp 4.3.85 (including) 4.3.85 (including)
Ntp Ntp 4.3.86 (including) 4.3.86 (including)
Ntp Ntp 4.3.87 (including) 4.3.87 (including)
Ntp Ntp 4.3.88 (including) 4.3.88 (including)
Ntp Ntp 4.3.89 (including) 4.3.89 (including)
Red Hat Enterprise Linux 6 RedHat ntp-0:4.2.6p5-10.el6 *
Red Hat Enterprise Linux 7 RedHat ntp-0:4.2.6p5-25.el7 *
Ntp Ubuntu esm-infra-legacy/trusty *
Ntp Ubuntu esm-infra/xenial *
Ntp Ubuntu precise *
Ntp Ubuntu trusty *
Ntp Ubuntu trusty/esm *
Ntp Ubuntu upstream *
Ntp Ubuntu vivid *
Ntp Ubuntu vivid/stable-phone-overlay *
Ntp Ubuntu wily *
Ntp Ubuntu xenial *

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