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CVE-2015-7702

19
FAUCET Score

CVE-2015-7702 is a denial-of-service vulnerability affecting NTP 4.2.x before 4.2.8p4 and 4.3.x before 4.3.77, stemming from an incomplete fix for a previous vulnerability. It allows remote attackers to crash the ntpd service, impacting products from vendors like Debian, NetApp, Oracle, and Red Hat. With a CVSS score of 6.5 (Medium), it can be exploited remotely with low complexity and no user interaction, leading to high availability impact. Currently, there is no known public exploit code (Metasploit, Nuclei, ExploitDB), it is not listed on the CISA KEV catalog, and it has received minimal community discussion or media coverage, suggesting low active exploitation or public awareness.

Impacted Technologies

VendorProductVersion(s)CPE
>= 4.2.0, < 4.2.8CPE matchmatch criteria
cpe:2.3:a:ntp:ntp:*:*:*:*:*:*:*:*
>= 4.3.0, < 4.3.77CPE matchmatch criteria
cpe:2.3:a:ntp:ntp:*:*:*:*:*:*:*:*
4.2.8CPE matchmatch criteria
cpe:2.3:a:ntp:ntp:4.2.8:-:*:*:*:*:*:*
4.2.8CPE matchmatch criteria
cpe:2.3:a:ntp:ntp:4.2.8:p1:*:*:*:*:*:*
4.2.8CPE matchmatch criteria
cpe:2.3:a:ntp:ntp:4.2.8:p1-beta1:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

6.5MEDIUM

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
5.21%
Probability of exploitation in next 30 days
EPSS Percentile
91.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0521 is in the 98th percentile among its peer group of 21,958 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 0.1 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

Patch Available

Vendor Patches (3)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: ntp-0:4.2.6p5-10.el6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: ntp-0:4.2.6p5-25.el7
View patch
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: ntp

Vendor Advisories (1)

redhatCVE-2015-7702Moderate

ntp: incomplete checks in ntp_crypto.c

Oct 21, 2015

References

rhn.redhat.com / errata/RHSA-2016-0780.html
Third Party Advisory
rhn.redhat.com / errata/RHSA-2016-2583.html
Third Party Advisory
security.gentoo.org / glsa/201607-15
Third Party AdvisoryVDB Entry
security.netapp.com / advisory/ntap-20171004-0001
Third Party Advisory
support.ntp.org / bin/view/Main/NtpBug2899
Vendor Advisory
debian.org / security/2015/dsa-3388
Third Party Advisory
oracle.com / technetwork/topics/security/linuxbulletinapr2016-2952096.html
Third Party Advisory
securityfocus.com / bid/77286
Third Party AdvisoryVDB Entry
securitytracker.com / id/1033951
Third Party AdvisoryVDB Entry