What is the CVSS score of CVE-2019-18336?

CVE-2019-18336 has a CVSS 3.1 base score of 7.5 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H. EPSS exploitation probability: 0.2%.

Simatic S7 300 Cpu Firmware CVE-2019-18336

HIGH

Uncontrolled Resource Consumption (CWE-400)

2020-03-10 productcert@siemens.com

Denial Of Service Simatic S7 300 Cpu Firmware Simatic S7 300 Cpu 312 Ifm Firmware Simatic S7 300 Cpu 313 Firmware Simatic S7 300 Cpu 314 Firmware Simatic S7 300 Cpu 314 Ifm Firmware Simatic S7 300 Cpu 315 Firmware Simatic S7 300 Cpu 315 2 Dp Firmware Simatic S7 300 Cpu 316 2 Dp Firmware Simatic S7 300 Cpu 318 2 Firmware Sinumerik 840D Sl Simatic Tdc Cp51M1 Firmware Simatic Tdc Cpu555 Firmware

7.5

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

7.5 HIGH

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Lifecycle Timeline

CVE Published

Mar 10, 2020 - 20:15 cve.org

HIGH 7.5

DescriptionCVE.org

A vulnerability has been identified in SIMATIC S7-300 CPU family (incl. related ET200 CPUs and SIPLUS variants) (All versions < V3.X.17), SIMATIC TDC CP51M1 (All versions < V1.1.8), SIMATIC TDC CPU555 (All versions < V1.1.1), SINUMERIK 840D sl (All versions < V4.8.6), SINUMERIK 840D sl (All versions < V4.94). Specially crafted packets sent to port 102/tcp (Profinet) could cause the affected device to go into defect mode. A restart is required in order to recover the system. Successful exploitation requires an attacker to have network access to port 102/tcp, with no authentication. No user interation is required. At the time of advisory publication no public exploitation of this security vulnerability was known.

AnalysisAI

A vulnerability has been identified in SIMATIC S7-300 CPU family (incl. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

Technical ContextAI

This vulnerability is classified as Uncontrolled Resource Consumption (CWE-400), which allows attackers to cause denial of service by exhausting system resources. A vulnerability has been identified in SIMATIC S7-300 CPU family (incl. related ET200 CPUs and SIPLUS variants) (All versions < V3.X.17), SIMATIC TDC CP51M1 (All versions < V1.1.8), SIMATIC TDC CPU555 (All versions < V1.1.1), SINUMERIK 840D sl (All versions < V4.8.6), SINUMERIK 840D sl (All versions < V4.94). Specially crafted packets sent to port 102/tcp (Profinet) could cause the affected device to go into defect mode. A restart is required in order to recover the system. Successful exploitation requires an attacker to have network access to port 102/tcp, with no authentication. No user interation is required. At the time of advisory publication no public exploitation of this security vulnerability was known. Affected products include: Siemens Simatic S7-300 Cpu Firmware, Siemens Simatic S7-300 Cpu 312 Ifm Firmware, Siemens Simatic S7-300 Cpu 313 Firmware, Siemens Simatic S7-300 Cpu 314 Firmware, Siemens Simatic S7-300 Cpu 314 Ifm Firmware.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Implement rate limiting, set resource quotas, validate input sizes, use timeouts.