HIGH
CVE-2015-5194
CWE-20Published: July 21, 2017· Updated: Jun 17, 2026
7.5
CVSS v3.1
Official Description
The log_config_command function in ntp_parser.y in ntpd in NTP before 4.2.7p42 allows remote attackers to cause a denial of service (ntpd crash) via crafted logconfig commands.
Technical Analysis
CVE-2015-5194 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.
The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.
A successful exploit results in availability disruption (denial of service), with a CVSS base score of 7.5.
CVSS v3.1 Vector Breakdown
Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityNone
AvailabilityHigh
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected Vendors & Products
Canonical1 product(s)
ubuntu linux
Debian1 product(s)
debian linux
Fedora1 product(s)
fedora
ntp1 product(s)
ntp
Red Hat4 product(s)
enterprise linux desktopenterprise linux hpc nodeenterprise linux serverenterprise linux workstation
SUSE5 product(s)
linux enterprise debuginfolinux enterprise servermanagermanager proxyopenstack cloud
Source: NVD CPE · 23 total CPE entries
Exploit & PoC Resources
NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.
Official Patches & Advisories
All References (40)
→
http://bk1.ntp.org/ntp-dev/?PAGE=patch&REV=4c4fc141LwvcoGp-lLGhkAFp3ZvtrAIssue Tracking · Patch · Vendor Advisory
→
→
→
http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00048.htmlThird Party Advisory
→
http://lists.opensuse.org/opensuse-security-announce/2016-07/msg00026.htmlThird Party Advisory
→
http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00042.htmlThird Party Advisory
→
http://rhn.redhat.com/errata/RHSA-2016-0780.htmlThird Party Advisory
→
http://rhn.redhat.com/errata/RHSA-2016-2583.htmlThird Party Advisory
→
http://www.debian.org/security/2015/dsa-3388Third Party Advisory
→
http://www.openwall.com/lists/oss-security/2015/08/25/3Mailing List · Patch · Third Party Advisory
→
http://www.securityfocus.com/bid/76475Third Party Advisory · VDB Entry
→
http://www.ubuntu.com/usn/USN-2783-1Third Party Advisory
→
https://bugzilla.redhat.com/show_bug.cgi?id=1254542Issue Tracking · Patch
→
https://github.com/ntp-project/ntp/commit/553f2fa65865c31c5e3c48812cfd46176cffdd27Issue Tracking · Patch · Third Party Advisory
Quick Facts
CVE IDCVE-2015-5194
CVSS Score7.5 / 10
SeverityHIGH
WeaknessCWE-20
CISA KEVNo
Affected6 vendor(s)
PublishedJul 21, 2017
Related CVEs (CWE-20)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2015-5194 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.