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CVE-2015-8139

17
FAUCET Score

CVE-2015-8139 describes a vulnerability in ntpq within NTP versions prior to 4.2.8p7, allowing remote attackers to obtain origin timestamps. This flaw enables attackers to impersonate legitimate peers, potentially disrupting time synchronization services. With a CVSS score of 5.3 (MEDIUM), the vulnerability is network-exploitable with low attack complexity, requiring no user interaction, and primarily impacts integrity. Despite its potential for impersonation, there is no evidence of active exploitation, publicly available exploit code, or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
<= 4.2.8CPE matchmatch criteria
cpe:2.3:a:ntp:ntp:*:p6:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

5.3MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
1.4
CvssVersion
3.0

Exploit Intelligence

EPSS Score
5.93%
Probability of exploitation in next 30 days
EPSS Percentile
92.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0593 is in the 89th percentile among its peer group of 23,725 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (3)

redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: ntp
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: ntp
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: ntp

Vendor Advisories (1)

redhatCVE-2015-8139Moderate

ntp: ntpq and ntpdc disclose origin timestamp to unauthenticated clients

Jan 20, 2016

References

lists.opensuse.org / opensuse-security-announce/2016-04/msg00059.html
Third Party Advisory
lists.opensuse.org / opensuse-security-announce/2016-04/msg00060.html
Third Party Advisory
lists.opensuse.org / opensuse-security-announce/2016-05/msg00020.html
Third Party Advisory
lists.opensuse.org / opensuse-security-announce/2016-05/msg00038.html
Third Party Advisory
lists.opensuse.org / opensuse-security-announce/2016-05/msg00048.html
Third Party Advisory
lists.opensuse.org / opensuse-updates/2016-05/msg00114.html
Third Party Advisory
bto.bluecoat.com / security-advisory/sa113
Third Party Advisory
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/K3EYJQHJZ2KTVQ7ICEFHXTLZ36MRASWX
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/ORAMN3Q7TVJ54MBYF75XCJOE3DP7LYHT
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/WNWGCQLW2VY72NIUYMJOCAKJKTXHDUK2
security.freebsd.org / advisories/FreeBSD-SA-16:09.ntp.asc
security.gentoo.org / glsa/201607-15
Third Party Advisory
security.netapp.com / advisory/ntap-20200204-0003
support.ntp.org / bin/view/Main/NtpBug2946
Vendor Advisory
kb.cert.org / vuls/id/718152
Third Party AdvisoryUS Government Resource
tools.cisco.com / security/center/content/CiscoSecurityAdvisory/cisco-sa-20160127-ntpd
Third Party Advisory
securityfocus.com / bid/82105
Third Party AdvisoryVDB Entry
securitytracker.com / id/1034782
Third Party AdvisoryVDB Entry