Information Leak and Denial of Service in Capital Embedded AR and SIMOTICS Products
CVE-2021-31889

7.5HIGH

Key Information:

Vendor

Siemens
Status
Capital Embedded Ar Classic 431-422
Capital Embedded Ar Classic R20-11
Pluscontrol 1st Gen
Simotics Connect 400
Vendor
CVE Published:
9 November 2021

What is CVE-2021-31889?

A vulnerability affecting Siemens products has been identified, specifically in Capital Embedded AR Classic and SIMOTICS CONNECT 400 series. Attackers can exploit malformed TCP packets containing a corrupted SACK option, potentially leading to information leaks and denial-of-service conditions. This issue affects all versions of Capital Embedded AR Classic 431-422, as well as specific versions of Capital Embedded AR Classic R20-11, PLUSCONTROL 1st Gen, and SIMOTICS CONNECT 400. Users are advised to take proper defensive measures to mitigate associated risks.

Affected Version(s)

Capital Embedded AR Classic 431-422 0

Capital Embedded AR Classic R20-11 0

PLUSCONTROL 1st Gen All versions

References

https://cert-portal.siemens.com/productcert/pdf/ssa-11458...
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https://cert-portal.siemens.com/productcert/pdf/ssa-04411...
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https://cert-portal.siemens.com/productcert/pdf/ssa-62028...
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CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.