HOME VULNERABILITIESCVE-2015-5146

MEDIUM

CVE-2015-5146

CWE-20Published: August 24, 2017· Updated: Jun 17, 2026

5.3

CVSS v3.1

Official Description

ntpd in ntp before 4.2.8p3 with remote configuration enabled allows remote authenticated users with knowledge of the configuration password and access to a computer entrusted to perform remote configuration to cause a denial of service (service crash) via a NULL byte in a crafted configuration directive packet.

Technical Analysis

CVE-2015-5146 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in availability disruption (denial of service), with a CVSS base score of 5.3.

CVSS v3.1 Vector Breakdown

Exploitability

Attack VectorNetwork

Attack ComplexityHigh

Privileges Req.Low

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected Vendors & Products

Debian1 product(s)

debian linux

Fedora1 product(s)

fedora

ntp1 product(s)

ntp

Source: NVD CPE · 6 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time

Offensive Security exploit database

GitHub PoC Search

Community PoC repositories

Rapid7 / Metasploit

Metasploit module search

Security advisories & exploits

Official NIST entry

CVE Program entry

External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttp://bugs.ntp.org/show_bug.cgi?id=2853

ADVISORYhttp://lists.fedoraproject.org/pipermail/package-announce/2015-November/170926.html

ADVISORYhttp://lists.fedoraproject.org/pipermail/package-announce/2015-October/169167.html

ADVISORYhttp://lists.fedoraproject.org/pipermail/package-announce/2015-September/166992.html

ADVISORYhttp://support.ntp.org/bin/view/Main/SecurityNotice#March_2017_ntp_4_2_8p10_NTP_Secu

ADVISORYhttp://www.debian.org/security/2015/dsa-3388

ADVISORYhttp://www.securityfocus.com/bid/75589

ADVISORYhttp://www.securitytracker.com/id/1034168

ADVISORYhttps://bugzilla.redhat.com/show_bug.cgi?id=1238136

ADVISORYhttps://security.gentoo.org/glsa/201509-01

ADVISORYhttp://bugs.ntp.org/show_bug.cgi?id=2853

ADVISORYhttp://lists.fedoraproject.org/pipermail/package-announce/2015-November/170926.html

ADVISORYhttp://lists.fedoraproject.org/pipermail/package-announce/2015-October/169167.html

ADVISORYhttp://lists.fedoraproject.org/pipermail/package-announce/2015-September/166992.html

ADVISORYhttp://support.ntp.org/bin/view/Main/SecurityNotice#March_2017_ntp_4_2_8p10_NTP_Secu

ADVISORYhttp://www.debian.org/security/2015/dsa-3388

ADVISORYhttp://www.securityfocus.com/bid/75589

ADVISORYhttp://www.securitytracker.com/id/1034168

ADVISORYhttps://bugzilla.redhat.com/show_bug.cgi?id=1238136

ADVISORYhttps://security.gentoo.org/glsa/201509-01

All References (22)

→

http://bugs.ntp.org/show_bug.cgi?id=2853Issue Tracking · Third Party Advisory

→

http://lists.fedoraproject.org/pipermail/package-announce/2015-November/170926.htmlThird Party Advisory

→

http://lists.fedoraproject.org/pipermail/package-announce/2015-October/169167.htmlThird Party Advisory

→

http://lists.fedoraproject.org/pipermail/package-announce/2015-September/166992.htmlThird Party Advisory

→

http://support.ntp.org/bin/view/Main/SecurityNotice#March_2017_ntp_4_2_8p10_NTP_SecuVendor Advisory

→

http://www.debian.org/security/2015/dsa-3388Third Party Advisory

→

http://www.securityfocus.com/bid/75589Third Party Advisory · VDB Entry

→

http://www.securitytracker.com/id/1034168Third Party Advisory · VDB Entry

→

https://bugzilla.redhat.com/show_bug.cgi?id=1238136Issue Tracking · Third Party Advisory

→

https://security.gentoo.org/glsa/201509-01Mitigation · Third Party Advisory · VDB Entry

→

https://security.netapp.com/advisory/ntap-20180731-0003/

→

http://bugs.ntp.org/show_bug.cgi?id=2853Issue Tracking · Third Party Advisory

→

http://lists.fedoraproject.org/pipermail/package-announce/2015-November/170926.htmlThird Party Advisory

→

http://lists.fedoraproject.org/pipermail/package-announce/2015-October/169167.htmlThird Party Advisory

→

http://lists.fedoraproject.org/pipermail/package-announce/2015-September/166992.htmlThird Party Advisory

Quick Facts

CVE IDCVE-2015-5146

CVSS Score5.3 / 10

SeverityMEDIUM

WeaknessCWE-20

CISA KEVNo

Affected3 vendor(s)

PublishedAug 24, 2017

Related CVEs (CWE-20)

Recommended Actions

→Apply vendor patches immediately
→Monitor CVE-2015-5146 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.

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