CVE-2018-4850

A vulnerability has been identified in SIMATIC S7-400 (incl. F) CPU hardware version 4.0 and below (All versions), SIMATIC S7-400 (incl. F) CPU hardware version 5.0 (All firmware versions < V5.2), SIMATIC S7-400H CPU hardware version 4.5 and below (All versions). The affected CPUs improperly validate S7 communication packets which could cause a Denial-of-Service condition of the CPU. The CPU will remain in DEFECT mode until manual restart.

CVSS v3.0 7.5 HIGH
CVSS v2.0 5.0 MEDIUM

7.5^/10

CVSS v3.0 : HIGH

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

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

5.0^/10

CVSS v2.0 : MEDIUM

Vector : AV:N/AC:L/Au:N/C:N/I:N/A:P

Exploitability : 10.0 / Impact : 2.9

Access Vector NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact PARTIAL

References

Link	Resource
https://www.siemens.com/global/en/home/products/services/cert.html#SecurityPublications	Vendor Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-914382.pdf	Vendor Advisory
http://www.securityfocus.com/bid/104217	Third Party Advisory VDB Entry

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Configurations

Configuration 1 (hide)

AND

cpe:2.3:o:siemens:simatic_s7-400_firmware:*:*:*:*:*:*:*:*

cpe:2.3:h:siemens:simatic_s7-400:-:*:*:*:*:*:*:*

Configuration 2 (hide)

AND

cpe:2.3:o:siemens:simatic_s7-400_firmware:*:*:*:*:*:*:*:*

cpe:2.3:h:siemens:simatic_s7-400:-:*:*:*:*:*:*:*

Configuration 3 (hide)

AND

cpe:2.3:o:siemens:simatic_s7-400h_firmware:*:*:*:*:*:*:*:*

cpe:2.3:h:siemens:simatic_s7-400h:-:*:*:*:*:*:*:*

Information

Published : 2018-05-16 10:29

Updated : 2019-10-09 16:41

NVD link : CVE-2018-4850

Mitre link : CVE-2018-4850

JSON object : View

CWE

NVD-CWE-noinfo

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Products Affected

siemens

simatic_s7-400h
simatic_s7-400_firmware
simatic_s7-400h_firmware
simatic_s7-400

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