CVE-2020-27632

In SIMATIC MV400 family versions prior to v7.0.6, the ISN generator is initialized with a constant value and has constant increments. An attacker could predict and hijack TCP sessions.

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

7.5^/10

CVSS v3.0 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

5.0^/10

CVSS v2.0 : MEDIUM

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

Exploitability : 10.0 / Impact : 2.9

Access Vector NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact NONE

Integrity Impact PARTIAL

Availability Impact NONE

References

Link	Resource
https://cert-portal.siemens.com/productcert/pdf/ssa-599268.pdf	Vendor Advisory

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Configurations

Configuration 1 (hide)

AND

cpe:2.3:o:siemens:simatic_mv420_firmware:*:*:*:*:*:*:*:*

cpe:2.3:h:siemens:simatic_mv420:-:*:*:*:*:*:*:*

Configuration 2 (hide)

AND

cpe:2.3:o:siemens:simatic_mv440_firmware:*:*:*:*:*:*:*:*

cpe:2.3:h:siemens:simatic_mv440:-:*:*:*:*:*:*:*

Information

Published : 2021-03-10 10:15

Updated : 2021-03-25 07:23

NVD link : CVE-2020-27632

Mitre link : CVE-2020-27632

JSON object : View

CWE

NVD-CWE-noinfo

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Products Affected

siemens

simatic_mv420
simatic_mv420_firmware
simatic_mv440
simatic_mv440_firmware

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