CVE-2015-1798

Summary

CVECVE-2015-1798
StatePUBLIC
Assigner[email protected]
Source PriorityCVE Program / NVD first with legacy fallback
Published2015-04-08 10:59:00 UTC
Updated2023-02-12 23:15:00 UTC
DescriptionThe symmetric-key feature in the receive function in ntp_proto.c in ntpd in NTP 4.x before 4.2.8p2 requires a correct MAC only if the MAC field has a nonzero length, which makes it easier for man-in-the-middle attackers to spoof packets by omitting the MAC.

Risk And Classification

Problem Types: CWE-17

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Ntp Ntp All All All All

References

ReferenceSourceLinkTags
About the security content of OS X Yosemite v10.10.4 and Security Update 2015-005 - Apple Support CONFIRM support.apple.com
[SECURITY] Fedora 22 Update: ntp-4.2.6p5-30.fc22 FEDORA lists.fedoraproject.org
support.ntp.org/bin/view/Main/SecurityNotice CONFIRM support.ntp.org Vendor Advisory
Ntpd MAC Checking Failure Lets Remote Users Bypass Authentication - SecurityTracker SECTRACK www.securitytracker.com
Multiple Vulnerabilities in ntpd (April 2015) Affecting Cisco Products CISCO tools.cisco.com
'[security bulletin] HPSBUX03333 SSRT102029 rev.1 - HP-UX Running NTP, Remote Denial of Service (DoS)' - MARC HP marc.info
Gentoo Security GENTOO security.gentoo.org
APPLE-SA-2015-06-30-2 OS X Yosemite v10.10.4 and Security Update 2015-005 APPLE lists.apple.com
NTP CVE-2015-1798 Man in the Middle Security Bypass Vulnerability BID www.securityfocus.com
Red Hat Customer Portal REDHAT rhn.redhat.com
[SECURITY] Fedora 20 Update: ntp-4.2.6p5-22.fc20 FEDORA lists.fedoraproject.org
Red Hat Customer Portal MISC access.redhat.com
Vulnerability Note VU#374268 - NTP Project ntpd reference implementation contains multiple vulnerabilities CERT-VN www.kb.cert.org Third Party Advisory, US Government Resource
Oracle Linux Bulletin - October 2015 CONFIRM www.oracle.com
Red Hat Customer Portal MISC access.redhat.com
Bug 2779 – ntpd accepts unauthenticated packets with symmetric key crypto CONFIRM bugs.ntp.org
access.redhat.com | CVE-2015-1798 MISC access.redhat.com
McAfee KnowledgeBase - Intel Security - Security Bulletin: Asset Manager 6.6 and Firewall Enterprise patches resolve two NTP vulnerabilities: CVE-2015-1798 and CVE-2015-1799 CONFIRM kc.mcafee.com
openSUSE-SU-2015:0775-1: moderate: Security update for ntp SUSE lists.opensuse.org
Support / Security / Advisories / / MDVSA-2015:202 | Mandriva MANDRIVA www.mandriva.com
USN-2567-1: NTP vulnerabilities | Ubuntu UBUNTU www.ubuntu.com
Oracle Solaris Third Party Bulletin - April 2015 CONFIRM www.oracle.com
Debian -- Security Information -- DSA-3223-1 ntp DEBIAN www.debian.org
Network Time Protocol Daemon MAC Checking Failure Authentication Bypass Vulnerability CISCO tools.cisco.com
Bug 1199430 – CVE-2015-1798 ntp: ntpd accepts unauthenticated packets with symmetric key crypto MISC bugzilla.redhat.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Legacy QID Mappings

  • 590349 Rockwell Automation Stratix 5900 Multiple Vulnerabilities (ICSA-17-094-04)
© CVE.report 2026 |

Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. It is the responsibility of user to evaluate the accuracy, completeness or usefulness of any information, opinion, advice or other content. EACH USER WILL BE SOLELY RESPONSIBLE FOR ANY consequences of his or her direct or indirect use of this web site. ALL WARRANTIES OF ANY KIND ARE EXPRESSLY DISCLAIMED. This site will NOT BE LIABLE FOR ANY DIRECT, INDIRECT or any other kind of loss.

CVE, CWE, and OVAL are registred trademarks of The MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. This site includes MITRE data granted under the following license.

CVE.report and Source URL Uptime Status status.cve.report