HOME VULNERABILITIESCVE-2015-7975

MEDIUM

CVE-2015-7975

CWE-119Published: January 30, 2017· Updated: Jun 17, 2026

6.2

CVSS v3.1

Official Description

The nextvar function in NTP before 4.2.8p6 and 4.3.x before 4.3.90 does not properly validate the length of its input, which allows an attacker to cause a denial of service (application crash).

Technical Analysis

CVE-2015-7975 requires local access, meaning attackers must already have a foothold on the target system.

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 6.2.

From a weakness classification perspective (CWE-119): Buffer overflow vulnerabilities can lead to arbitrary code execution or denial of service by corrupting adjacent memory.

CVSS v3.1 Vector Breakdown

Exploitability

Attack VectorLocal

Attack ComplexityLow

Privileges Req.None

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

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

Affected Vendors & Products

ntp1 product(s)

ntp

Source: NVD CPE · 90 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://lists.opensuse.org/opensuse-security-announce/2016-04/msg00059.html

ADVISORYhttp://lists.opensuse.org/opensuse-security-announce/2016-04/msg00060.html

ADVISORYhttp://lists.opensuse.org/opensuse-security-announce/2016-05/msg00020.html

ADVISORYhttp://lists.opensuse.org/opensuse-security-announce/2016-05/msg00038.html

ADVISORYhttp://lists.opensuse.org/opensuse-security-announce/2016-05/msg00048.html

ADVISORYhttp://lists.opensuse.org/opensuse-security-announce/2016-07/msg00026.html

ADVISORYhttp://lists.opensuse.org/opensuse-security-announce/2016-08/msg00042.html

ADVISORYhttp://lists.opensuse.org/opensuse-updates/2016-05/msg00114.html

ADVISORYhttp://support.ntp.org/bin/view/Main/NtpBug2937

ADVISORYhttp://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160127-ntpd

ADVISORYhttp://www.securityfocus.com/bid/81959

ADVISORYhttp://www.securitytracker.com/id/1034782

ADVISORYhttp://www.ubuntu.com/usn/USN-3096-1

ADVISORYhttps://bto.bluecoat.com/security-advisory/sa113

ADVISORYhttps://security.gentoo.org/glsa/201607-15

ADVISORYhttps://www.kb.cert.org/vuls/id/718152

ADVISORYhttp://lists.opensuse.org/opensuse-security-announce/2016-04/msg00059.html

ADVISORYhttp://lists.opensuse.org/opensuse-security-announce/2016-04/msg00060.html

ADVISORYhttp://lists.opensuse.org/opensuse-security-announce/2016-05/msg00020.html

ADVISORYhttp://lists.opensuse.org/opensuse-security-announce/2016-05/msg00038.html

ADVISORYhttp://lists.opensuse.org/opensuse-security-announce/2016-05/msg00048.html

ADVISORYhttp://lists.opensuse.org/opensuse-security-announce/2016-07/msg00026.html

ADVISORYhttp://lists.opensuse.org/opensuse-security-announce/2016-08/msg00042.html

ADVISORYhttp://lists.opensuse.org/opensuse-updates/2016-05/msg00114.html

ADVISORYhttp://support.ntp.org/bin/view/Main/NtpBug2937

ADVISORYhttp://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160127-ntpd

ADVISORYhttp://www.securityfocus.com/bid/81959

ADVISORYhttp://www.securitytracker.com/id/1034782

ADVISORYhttp://www.ubuntu.com/usn/USN-3096-1

ADVISORYhttps://bto.bluecoat.com/security-advisory/sa113

ADVISORYhttps://security.gentoo.org/glsa/201607-15

ADVISORYhttps://www.kb.cert.org/vuls/id/718152

All References (40)

→

http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00059.htmlThird Party Advisory

→

http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00060.htmlThird Party Advisory

→

http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00020.htmlThird Party Advisory

→

http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00038.htmlThird Party 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://lists.opensuse.org/opensuse-updates/2016-05/msg00114.htmlThird Party Advisory

→

http://support.ntp.org/bin/view/Main/NtpBug2937Vendor Advisory

→

http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160127-ntpdThird Party Advisory

→

http://www.securityfocus.com/bid/81959Third Party Advisory · VDB Entry

→

http://www.securitytracker.com/id/1034782Third Party Advisory · VDB Entry

→

http://www.ubuntu.com/usn/USN-3096-1Third Party Advisory

→

https://bto.bluecoat.com/security-advisory/sa113Third Party Advisory

→

https://h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03750en_us

Quick Facts

CVE IDCVE-2015-7975

CVSS Score6.2 / 10

SeverityMEDIUM

WeaknessCWE-119

CISA KEVNo

Affected1 vendor(s)

PublishedJan 30, 2017

Related CVEs (CWE-119)

Recommended Actions

→Apply vendor patches immediately
→Monitor CVE-2015-7975 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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