MEDIUM
CVE-2015-1799
CWE-17Published: April 8, 2015· Updated: Jun 17, 2026
4.3
CVSS v3.1
Official Description
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.
Technical Analysis
CVE-2015-1799 requires adjacent network access, limiting remote exploitation but still posing risk in shared or local network environments.
Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.
CVSS v3.1 Vector Breakdown
Exploitability
Attack VectorAdjacent
Attack ComplexityM
Privileges Req.
User Interaction
Scope
Impact
ConfidentialityNone
IntegrityP
AvailabilityP
AV:A/AC:M/Au:N/C:N/I:P/A:P
Affected Vendors & Products
ntp1 product(s)
ntp
Source: NVD CPE · 1 total CPE entries
Exploit & PoC Resources
NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
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GitHub PoC Search
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Rapid7 / Metasploit
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PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
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Official Patches & Advisories
All References (48)
Quick Facts
CVE IDCVE-2015-1799
CVSS Score4.3 / 10
SeverityMEDIUM
WeaknessCWE-17
CISA KEVNo
Affected1 vendor(s)
PublishedApr 8, 2015
Related CVEs (CWE-17)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2015-1799 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.