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CVE-2015-7703

20
FAUCET Score

CVE-2015-7703 is a critical vulnerability affecting NTP ntpd versions 4.2.x before 4.2.8p4 and 4.3.x before 4.3.77, specifically when remote configuration is enabled. An authenticated attacker with knowledge of the remote configuration password can exploit this flaw to write to arbitrary files on affected systems, including Debian, NetApp, Oracle, and Red Hat products. The vulnerability has a CVSS score of 7.5 (HIGH), indicating a network-based attack with low complexity and high impact on integrity, but no impact on confidentiality or availability. There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

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

7.5HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
3.82%
Probability of exploitation in next 30 days
EPSS Percentile
89.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0382 is in the 80th percentile among its peer group of 51,551 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, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 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-2015-7703Low

ntp: config command can be used to set the pidfile and drift file paths

Aug 25, 2015

References

rhn.redhat.com / errata/RHSA-2016-0780.html
Third Party Advisory
rhn.redhat.com / errata/RHSA-2016-2583.html
Third Party Advisory
bugzilla.redhat.com / show_bug.cgi
Issue TrackingThird Party AdvisoryVDB Entry
security.gentoo.org / glsa/201607-15
Third Party Advisory
security.netapp.com / advisory/ntap-20171004-0001
Third Party Advisory
support.ntp.org / bin/view/Main/NtpBug2902
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/77278
Third Party AdvisoryVDB Entry
securitytracker.com / id/1033951
Third Party AdvisoryVDB Entry