CVE-2018-7182

Exp

The ctl_getitem method in ntpd in ntp-4.2.8p6 before 4.2.8p11 allows remote attackers to cause a denial of service (out-of-bounds read) via a crafted mode 6 packet with a ntpd instance from 4.2.8p6 through 4.2.8p10.

Published: 2018-03-06 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2018-7182 is rated High Exploit Risk (74.5/100): CVSS High severity, with high exploitation likelihood (EPSS 11.08%, 93th percentile). 2 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2018-7182

EDB-ID Source Kind Published Link
45846 exploit_db edb 2018-11-14 Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2018-7182

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-04-13 14.26% 11.08% -3.18%
2 2025-12-28 14.42% 14.26% -0.16%
3 2025-12-27 — 14.42% —

Full EPSS history (27 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2018-7182

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 3.0 HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 3.6 [email protected]
5.0 2.0 MEDIUM
AV:N/AC:L/Au:N/C:N/I:N/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-2018-7182

OS Trackers for CVE-2018-7182

vendor priority summary link
debian not yet assigned CVE-2018-7182 not yet assigned priority: Debian including 2 source packages (ntp, ntpsec), 6 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 6. https://security-tracker.debian.org/tracker/CVE-2018-7182
gentoo normal CVE-2018-7182: 1 GLSA(s) (201805-12), 1 atom(s) (net-misc/ntp); latest impact normal. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2018-7182
redhat medium — https://access.redhat.com/security/cve/CVE-2018-7182
suse medium CVE-2018-7182 severity moderate: SUSE including 28 source package names (libntpc1-1.2.1-1.2, ntp, …), 92 product×package rows across 61 product lines (Image SLES12-SP5-Azure-BYOS, Image SLES12-SP5-Azure-Basic-On-Demand, … (61 product lines)): Fixed 81, Known Not Affected 11. https://www.suse.com/security/cve/CVE-2018-7182/
ubuntu medium CVE-2018-7182 medium priority: Ubuntu including 1 source packages (ntp), 5 status rows across 5 suites (artful, bionic, trusty, upstream, xenial): released 3, not-affected 2. https://ubuntu.com/security/CVE-2018-7182

Affected software / configurations for CVE-2018-7182

Vendor Product Version Raw CPE
ntp ntp 4.2.8 cpe:2.3:a:ntp:ntp:4.2.8:p10:*:*:*:*:*:*
ntp ntp 4.2.8 cpe:2.3:a:ntp:ntp:4.2.8:p6:*:*:*:*:*:*
ntp ntp 4.2.8 cpe:2.3:a:ntp:ntp:4.2.8:p7:*:*:*:*:*:*
ntp ntp 4.2.8 cpe:2.3:a:ntp:ntp:4.2.8:p8:*:*:*:*:*:*
ntp ntp 4.2.8 cpe:2.3:a:ntp:ntp:4.2.8:p9:*:*:*:*:*:*
canonical ubuntu_linux 17.10 cpe:2.3:o:canonical:ubuntu_linux:17.10:*:*:*:*:*:*:*
canonical ubuntu_linux 18.04 cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
netapp element_software — cpe:2.3:a:netapp:element_software:-:*:*:*:*:*:*:*

References for CVE-2018-7182

URL Tags
http://packetstormsecurity.com/files/146631/Slackware-Security-Advisory-ntp-Updates.html Third Party Advisory VDB Entry
http://support.ntp.org/bin/view/Main/NtpBug3412 Mitigation Vendor Advisory
http://www.securityfocus.com/archive/1/541824/100/0/threaded Third Party Advisory VDB Entry
http://www.securityfocus.com/bid/103191 Third Party Advisory VDB Entry
https://security.FreeBSD.org/advisories/FreeBSD-SA-18:02.ntp.asc Patch Third Party Advisory
https://security.gentoo.org/glsa/201805-12 Third Party Advisory
https://security.netapp.com/advisory/ntap-20180626-0001/ Third Party Advisory
https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbux03962en_us
https://usn.ubuntu.com/3707-1/ Third Party Advisory
https://www.exploit-db.com/exploits/45846/ Exploit Third Party Advisory VDB Entry
https://www.synology.com/support/security/Synology_SA_18_13 Third Party Advisory
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