CVE-2015-1798

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Summary

CVECVE-2015-1798
StatePUBLISHED
Assignerredhat
Source PriorityCVE Program / NVD first with legacy fallback
Published2015-04-08 10:59:04 UTC
Updated2026-05-06 22:30:45 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

Primary CVSS: v2.0 1.8 from [email protected]

AV:A/AC:H/Au:N/C:N/I:P/A:N

Problem Types: CWE-17 | n/a

CVSS v2.0 Breakdown

Access Vector
Adjacent
Access Complexity
High
Authentication
None
Confidentiality
None
Integrity
Partial
Availability
None

AV:A/AC:H/Au:N/C:N/I:P/A:N

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Ntp Ntp All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Na N/a affected n/a Not specified

References

ReferenceSourceLinkTags
Multiple Vulnerabilities in ntpd (April 2015) Affecting Cisco Products af854a3a-2127-422b-91ae-364da2661108 tools.cisco.com
Vulnerability Note VU#374268 - NTP Project ntpd reference implementation contains multiple vulnerabilities af854a3a-2127-422b-91ae-364da2661108 www.kb.cert.org Third Party Advisory, US Government Resource
Oracle Solaris Third Party Bulletin - April 2015 af854a3a-2127-422b-91ae-364da2661108 www.oracle.com
Ntpd MAC Checking Failure Lets Remote Users Bypass Authentication - SecurityTracker af854a3a-2127-422b-91ae-364da2661108 www.securitytracker.com
[SECURITY] Fedora 22 Update: ntp-4.2.6p5-30.fc22 af854a3a-2127-422b-91ae-364da2661108 lists.fedoraproject.org
APPLE-SA-2015-06-30-2 OS X Yosemite v10.10.4 and Security Update 2015-005 af854a3a-2127-422b-91ae-364da2661108 lists.apple.com
NTP CVE-2015-1798 Man in the Middle Security Bypass Vulnerability af854a3a-2127-422b-91ae-364da2661108 www.securityfocus.com
Gentoo Security af854a3a-2127-422b-91ae-364da2661108 security.gentoo.org
support.ntp.org/bin/view/Main/SecurityNotice af854a3a-2127-422b-91ae-364da2661108 support.ntp.org Vendor Advisory
openSUSE-SU-2015:0775-1: moderate: Security update for ntp af854a3a-2127-422b-91ae-364da2661108 lists.opensuse.org
'[security bulletin] HPSBUX03333 SSRT102029 rev.1 - HP-UX Running NTP, Remote Denial of Service (DoS)' - MARC af854a3a-2127-422b-91ae-364da2661108 marc.info
Network Time Protocol Daemon MAC Checking Failure Authentication Bypass Vulnerability af854a3a-2127-422b-91ae-364da2661108 tools.cisco.com
Bug 2779 – ntpd accepts unauthenticated packets with symmetric key crypto af854a3a-2127-422b-91ae-364da2661108 bugs.ntp.org
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 af854a3a-2127-422b-91ae-364da2661108 kc.mcafee.com
USN-2567-1: NTP vulnerabilities | Ubuntu af854a3a-2127-422b-91ae-364da2661108 www.ubuntu.com
Support / Security / Advisories / / MDVSA-2015:202 | Mandriva af854a3a-2127-422b-91ae-364da2661108 www.mandriva.com
Oracle Linux Bulletin - October 2015 af854a3a-2127-422b-91ae-364da2661108 www.oracle.com
[SECURITY] Fedora 20 Update: ntp-4.2.6p5-22.fc20 af854a3a-2127-422b-91ae-364da2661108 lists.fedoraproject.org
About the security content of OS X Yosemite v10.10.4 and Security Update 2015-005 - Apple Support af854a3a-2127-422b-91ae-364da2661108 support.apple.com
Debian -- Security Information -- DSA-3223-1 ntp af854a3a-2127-422b-91ae-364da2661108 www.debian.org
Red Hat Customer Portal af854a3a-2127-422b-91ae-364da2661108 rhn.redhat.com
Red Hat Customer Portal MITRE access.redhat.com
Red Hat Customer Portal MITRE access.redhat.com
access.redhat.com | CVE-2015-1798 MITRE access.redhat.com
Bug 1199430 – CVE-2015-1798 ntp: ntpd accepts unauthenticated packets with symmetric key crypto MITRE 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)
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