What is the CVSS score of CVE-2020-15783?

CVE-2020-15783 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%.

Sinumerik 840D Sl Firmware CVE-2020-15783

HIGH

Uncontrolled Resource Consumption (CWE-400)

2020-11-12 productcert@siemens.com

Denial Of Service Sinumerik 840D Sl Firmware Simatic S7 300 Cpu 312 Firmware Simatic S7 300 Cpu 314 Firmware Simatic S7 300 Cpu 315 2 Dp Firmware Simatic S7 300 Cpu 315 2 Pn Firmware Simatic S7 300 Cpu 317 2 Pn Firmware Simatic S7 300 Cpu 317 2 Dp Firmware Simatic S7 300 Cpu 315F 2 Dp Firmware Simatic S7 300 Cpu 315F 2 Pn Firmware Simatic S7 300 Cpu 317F 2 Pn Firmware Simatic S7 300 Cpu 317F 2 Dp 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

Nov 12, 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), SIMATIC TDC CPU555 (All versions), SINUMERIK 840D sl (All versions). Sending multiple specially crafted packets to the affected devices could cause a Denial-of-Service on port 102. A cold restart is required to recover the service.

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), SIMATIC TDC CPU555 (All versions), SINUMERIK 840D sl (All versions). Sending multiple specially crafted packets to the affected devices could cause a Denial-of-Service on port 102. A cold restart is required to recover the service. Affected products include: Siemens Sinumerik 840D Sl Firmware, Siemens Simatic S7-300 Cpu 312 Firmware, Siemens Simatic S7-300 Cpu 314 Firmware, Siemens Simatic S7-300 Cpu 315-2 Dp Firmware, Siemens Simatic S7-300 Cpu 315-2 Pn 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.