Vulnerabilities
Misconfiguration
Compliance
CVE Vulnerabilities

CVE-2016-7433

Incorrect Calculation

Published: Jan 13, 2017 | Modified: Apr 20, 2025
CVSS 3.x
5.3
MEDIUM
Source:
NVD
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
CVSS 2.x
5 MEDIUM
AV:N/AC:L/Au:N/C:N/I:N/A:P
RedHat/V2
1.2 LOW
AV:L/AC:H/Au:N/C:N/I:N/A:P
RedHat/V3
2.9 LOW
CVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
Ubuntu
MEDIUM
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Additional information
NVDhttps://nvd.nist.gov/vuln/detail/CVE-2016-7433
CWEhttps://cwe.mitre.org/data/definitions/682.html

NTP before 4.2.8p9 does not properly perform the initial sync calculations, which allows remote attackers to unspecified impact via unknown vectors, related to a root distance that did not include the peer dispersion.

Weakness

The product performs a calculation that generates incorrect or unintended results that are later used in security-critical decisions or resource management.

Affected Software

NameVendorStart VersionEnd Version
NtpNtp*4.2.8 (including)
Red Hat Enterprise Linux 6RedHatntp-0:4.2.6p5-10.el6_8.2*
Red Hat Enterprise Linux 7RedHatntp-0:4.2.6p5-25.el7_3.1*
NtpUbuntuesm-infra/xenial*
NtpUbuntuprecise*
NtpUbuntuupstream*
NtpUbuntuvivid/stable-phone-overlay*
NtpUbuntuxenial*
NtpUbuntuyakkety*

Potential Mitigations

  • Use languages, libraries, or frameworks that make it easier to handle numbers without unexpected consequences.
  • Examples include safe integer handling packages such as SafeInt (C++) or IntegerLib (C or C++).
  • Use languages, libraries, or frameworks that make it easier to handle numbers without unexpected consequences.
  • Examples include safe integer handling packages such as SafeInt (C++) or IntegerLib (C or C++).

References

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