Siemens TCP Stack of SIMATIC MV400
view advisory published 2021-03-09
As a general security measure, Siemens strongly recommends to protect network access to devices with appropriate mechanisms. In order to operate the devices in a protected IT environment, Siemens recommends to configure the environment according to Siemens' operational guidelines for Industrial Security (Download: https://www.siemens.com/cert/operational-guidelines-industrial-security), and to follow the recommendations in the product manuals.
01
describes (2)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2020-25241US | high7.5 | — | ||
A vulnerability has been identified in SIMATIC MV400 family (All Versions < V7.0.6). The underlying TCP stack of the affected products does not correctly validate the sequence numb… | ||||
| CVE-2020-27632US | high7.5OT elevated | — | ||
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 sessi… | ||||
02
references
External citations — patches, advisories, analysis.
- SSA-599268: Several Vulnerabilities in TCP Stack of SIMATIC MV400 family - HTML Versionself
- ICS Advisory ICSA-21-068-07 JSONself
- Recommended Practicesexternal
- ICS Advisory ICSA-21-068-07 - Web Versionself
- Recommended Practicesexternal
- Recommended Practicesexternal
- Recommended Practicesexternal
- Recommended Practicesexternal
03
remediations (2)
- FixedSIMATIC MV400 family
Update to V7.0.6
- FixedSIMATIC MV400 family
Update to V7.0.6
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