CVE-2015-5300

Impact:
Moderate
Public Date:
2015-10-21
CWE:
CWE-20
Bugzilla:
1271076: CVE-2015-5300 ntp: MITM attacker can force ntpd to make a step larger than the panic threshold
It was found that ntpd did not correctly implement the threshold limitation for the '-g' option, which is used to set the time without any restrictions. A man-in-the-middle attacker able to intercept NTP traffic between a connecting client and an NTP server could use this flaw to force that client to make multiple steps larger than the panic threshold, effectively changing the time to an arbitrary value at any time.

Find out more about CVE-2015-5300 from the MITRE CVE dictionary dictionary and NIST NVD.

Statement

Red Hat Enterprise Linux 5 is now in Production 3 Phase of the support and maintenance life cycle. This has been rated as having Moderate security impact and is not currently planned to be addressed in future updates. For additional information, refer to the Red Hat Enterprise Linux Life Cycle: https://access.redhat.com/support/policy/updates/errata/

CVSS v2 metrics

Base Score 4.3
Base Metrics AV:N/AC:M/Au:N/C:N/I:P/A:N
Access Vector Network
Access Complexity Medium
Authentication None
Confidentiality Impact None
Integrity Impact Partial
Availability Impact None

Find out more about Red Hat support for the Common Vulnerability Scoring System (CVSS).

Red Hat Security Errata

Platform Errata Release Date
Red Hat Enterprise Linux 6 (ntp) RHSA-2015:1930 2015-10-26
Red Hat Enterprise Linux 7 (ntp) RHSA-2015:1930 2015-10-26

Affected Packages State

Platform Package State
Red Hat Enterprise Linux 5 ntp Will not fix

Acknowledgements

Red Hat would like to thank Aanchal Malhotra, Isaac E. Cohen, and Sharon Goldberg of Boston University for reporting this issue.

External References

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