CVE-2015-1799
MEDIUMDescription
The symmetric-key feature in the receive function in ntp_proto.c in ntpd in NTP 3.x and 4.x before 4.2.8p2 performs state-variable updates upon receiving certain invalid packets, which makes it easier for man-in-the-middle attackers to cause a denial of service (synchronization loss) by spoofing the source IP address of a peer.
How to fix
Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.
CVSS v2 Vector
No CVSS vector data available.
Exploit Intelligence
Moderate risk: more likely to be exploited than 55% of all known CVEs.
References
- bugs.ntp.org
- listengine.tuxfamily.org
- lists.apple.com
- lists.fedoraproject.org
- lists.fedoraproject.org
- lists.opensuse.org
- marc.info
- marc.info
- rhn.redhat.com
- support.apple.com
- tools.cisco.com
- tools.cisco.com
- debian.org
- debian.org
- mandriva.com
- oracle.com
- oracle.com
- securityfocus.com
- securitytracker.com
- ubuntu.com
- kc.mcafee.com
- security.gentoo.org
Related Vulnerabilities
Other CWE-17 vulnerabilities, ordered by exploit likelihood. View all
| CVE | Severity | CVSS | EPSS | Exploited | Fix |
|---|---|---|---|---|---|
| CVE-2015-0240 | High | 10.0 | 88% | - | Fix |
| CVE-2015-3183 | Medium | 5.0 | 73% | - | Fix |
| CVE-2014-9222 | High | 10.0 | 64% | - | - |
| CVE-2015-4620 | High | 7.8 | 38% | - | Fix |
| CVE-2014-9707 | High | 7.5 | 28% | - | - |
| CVE-2015-2526 | Medium | 5.0 | 24% | - | - |
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Markdown
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Start freeThis product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-05-06.