What is the CVSS score of CVE-2019-18858?

CVE-2019-18858 has a CVSS 3.1 base score of 9.8 (Critical). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 2.0%.

Is there a public PoC exploit available for CVE-2019-18858?

Yes, a public proof-of-concept exploit is available for CVE-2019-18858. Prioritise patching immediately. EPSS: 2.0%.

Control For Beaglebone CVE-2019-18858

CRITICAL

Classic Buffer Overflow (CWE-120)

2019-11-20 cve@mitre.org

Buffer Overflow Control For Beaglebone Control For Empc A Imx6 Control For Iot2000 Control For Linux Control For Pfc100 Control For Pfc200 Control For Plcnext Control For Raspberry Pi Control Rte Control Runtime System Toolkit Control Win Embedded Target Visu Toolkit Hmi Remote Target Visu Toolkit

9.8

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

9.8 CRITICAL

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

CVE Published

Nov 20, 2019 - 18:15 nvd

CRITICAL 9.8

DescriptionNVD

CODESYS 3 web server before 3.5.15.20, as distributed with CODESYS Control runtime systems, has a Buffer Overflow.

AnalysisAI

CODESYS 3 web server before 3.5.15.20, as distributed with CODESYS Control runtime systems, has a Buffer Overflow. Rated critical severity (CVSS 9.8), 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 Buffer Copy without Size Check (CWE-120), which allows attackers to overflow a buffer to corrupt adjacent memory. CODESYS 3 web server before 3.5.15.20, as distributed with CODESYS Control runtime systems, has a Buffer Overflow. Affected products include: Codesys Control For Beaglebone, Codesys Control For Empc-A\/Imx6, Codesys Control For Iot2000, Codesys Control For Linux, Codesys Control For Pfc100. Version information: before 3.5.15.20.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Always validate buffer sizes before copy operations. Use bounded functions (strncpy, snprintf). Enable compiler protections.