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.
Published 2015-04-08 10:59:06
Updated 2018-01-05 02:30:00
Source Red Hat, Inc.
View at NVD,   CVE.org
Vulnerability category: Denial of service

Exploit prediction scoring system (EPSS) score for CVE-2015-1799

0.63%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 79 %
Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2015-1799

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
4.3
MEDIUM AV:A/AC:M/Au:N/C:N/I:P/A:P
5.5
4.9
NIST

CWE ids for CVE-2015-1799

  • Assigned by: nvd@nist.gov (Primary)

References for CVE-2015-1799

Products affected by CVE-2015-1799

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