What is the CVSS score of CVE-2019-6443?

CVE-2019-6443 has a CVSS 3.0 base score of 9.1 (Critical). CVSS vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H. EPSS exploitation probability: 66.9%.

Is there a public PoC exploit available for CVE-2019-6443?

Yes, a public proof-of-concept exploit is available for CVE-2019-6443. Prioritise patching immediately. EPSS: 66.9%.

Ntpsec CVE-2019-6443

CRITICAL

Out-of-bounds Read (CWE-125)

2019-01-16 cve@mitre.org

Buffer Overflow Information Disclosure Ntpsec

9.1

CVSS 3.0 · NVD

Severity by source

NVD PRIMARY

9.1 CRITICAL

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

High

Lifecycle Timeline

CVE Published

Jan 16, 2019 - 05:29 nvd

CRITICAL 9.1

DescriptionNVD

An issue was discovered in NTPsec before 1.1.3. Because of a bug in ctl_getitem, there is a stack-based buffer over-read in read_sysvars in ntp_control.c in ntpd.

AnalysisAI

An issue was discovered in NTPsec before 1.1.3. Rated critical severity (CVSS 9.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.

Technical ContextAI

This vulnerability is classified as Out-of-bounds Read (CWE-125), which allows attackers to read data from memory outside the intended buffer boundaries. An issue was discovered in NTPsec before 1.1.3. Because of a bug in ctl_getitem, there is a stack-based buffer over-read in read_sysvars in ntp_control.c in ntpd. Affected products include: Ntpsec. Version information: before 1.1.3..

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Validate array indices and buffer lengths. Use memory-safe languages. Enable AddressSanitizer during testing.