CVE-2019-6445

Exp

An issue was discovered in NTPsec before 1.1.3. An authenticated attacker can cause a NULL pointer dereference and ntpd crash in ntp_control.c, related to ctl_getitem.

Published: 2019-01-16 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2019-6445 is rated High Exploit Risk (79.2/100): CVSS Medium severity, with high exploitation likelihood (EPSS 16.56%, 95th percentile). 4 public exploit reference(s) are indexed (Exploit-DB). EPSS rose +9.62% over the last day, indicating growing attacker interest. 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-2019-6445

EDB-ID Source Kind Published Link
46177 exploit_db edb 2019-01-16 Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2019-6445

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 2026-05-26 6.94% 16.56% +9.62%
2 2026-02-07 11.67% 6.94% -4.73%
3 2025-12-17 — 11.67% —

Full EPSS history (30 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2019-6445

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
6.5 3.0 MEDIUM
CVSS:3.0/AV:N/AC:L/PR:L/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:L)
A normal user session is enough; they don’t have to be admin.
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.
 2.8 3.6 [email protected]
4.0 2.0 MEDIUM
AV:N/AC:L/Au:S/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:S)
A single authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:P)
Partial availability impact.
 8.0 2.9 [email protected]

Weakness enumeration for CVE-2019-6445

OS Trackers for CVE-2019-6445

vendor priority summary link
alpine medium CVE-2019-6445: 1 source package rows (ntpsec); 7 state rows across 7 repos (3.17-community, 3.18-community, 3.19-community, 3.20-community, 3.21-community, 3.22-community, edge-community); fixed 7, open 0. https://security.alpinelinux.org/vuln/CVE-2019-6445
debian not yet assigned CVE-2019-6445 not yet assigned priority: Debian including 1 source packages (ntpsec), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2019-6445
ubuntu medium CVE-2019-6445 medium priority: Ubuntu including 1 source packages (ntpsec), 5 status rows across 5 suites (bionic, cosmic, trusty, upstream, xenial): released 3, DNE 2. https://ubuntu.com/security/CVE-2019-6445

Affected software / configurations for CVE-2019-6445

Vendor Product Version Raw CPE
ntpsec ntpsec < 1.1.3 cpe:2.3:a:ntpsec:ntpsec:*:*:*:*:*:*:*:*

References for CVE-2019-6445

URL Tags
https://dumpco.re/blog/ntpsec-bugs Exploit Third Party Advisory
https://dumpco.re/bugs/ntpsec-authed-npe Exploit Third Party Advisory
https://github.com/ntpsec/ntpsec/blob/NTPsec_1_1_3/NEWS Release Notes Third Party Advisory
https://www.exploit-db.com/exploits/46177/ Exploit Third Party Advisory VDB Entry
cvelogic Threat Intelligence