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CVE-2021-31344

A vulnerability has been identified in Capital Embedded AR Classic 431-422 (All versions), Capital Embedded AR Classic R20-11 (All versions < V2303), PLUSCONTROL 1st Gen (All versions), SIMOTICS CO...

No known exploitation. EPSS puts it in the 73rd percentile. Fixed versions are out.

CVSS 3.15.3MediumEPSS percentile73rd1.5% chance in 30 daysCISA KEVNot listedNo confirmed exploitation
No public exploit knownFix5 products3 fixed builds listed below

Published Updated Sources: CVE.org, NVD, CSAF

NVD CVE.org

What to do

Find your product and version, then upgrade to the build on the right.

  • Siemens Capital Embedded AR Classic R20-11Affected: < V2303Upgrade to: V2303Stated by: CVE record
  • Siemens PLUSCONTROL 1st GenAffected: All versionsUpgrade to: not statedStated by: CVE record
  • Siemens SIMOTICS CONNECT 400Affected: All versions < V0.5.0.0Upgrade to: not statedStated by: CVE record
  • Siemens Nucleus Readystart V3Affected: < 2017.02.1Upgrade to: 2017.02.1Stated by: NVD
  • Siemens Nucleus Readystart V4Affected: < 4.1.1Upgrade to: 4.1.1Stated by: NVD

Versions as the sources state them. Full version matrix after sign-in

What it is

From the CVE record

Multiple vulnerabilities (also known as "NUCLEUS:13") have been identified in the Nucleus RTOS (real-time operating system) and reported in the Siemens Security Advisory SSA-044112: https://cert-portal.siemens.com/productcert/pdf/ssa-044112.pdf. The products listed below use affected versions of the Nucleus software and inherently contain these vulnerabilities. Siemens has released updates for several affected products and recommends to update to the latest versions. Siemens recommends specific countermeasures for products where updates are not, or not yet available.

In plain language

No plain-language summary for this CVE yet.

Exploitation

Where each signal puts this CVE on the scale from published to confirmed exploited.

EPSS73rd
CISA KEV

Not in the catalog. CISA has not confirmed exploitation.

Public exploits

No public exploit or proof of concept found in the sources we track.

EPSS

1.5% chance of exploitation activity in the next 30 days, which ranks it in the 73rd percentile of scored CVEs.

Exploit Prediction Scoring System, FIRST.org. A probability, not a confirmation.

Lifecycle

5 events over 1108 days, from the signal feeds we watch.

  1. Patch availablerecord updated
  2. Publishedweakness classified, att&ck mapped

Affected products

And 7 more affected products. See all after sign-in

Technical detail

CVSS 3.1 vector

Open in the CVSS calculator

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Scored 5.3 by NVD.

How it is reached

  • Attack Vector NetworkExploitable remotely over the network without any special conditions
  • Attack Complexity LowNo special conditions — the attack can be reliably reproduced
  • Privileges Required NoneNo authentication required — anyone can exploit this
  • User Interaction NoneNo user interaction needed — fully automated exploitation

Scope

  • Scope UnchangedImpact is limited to the vulnerable component itself

Impact if exploited

  • Confidentiality NoneNo confidentiality impact
  • Integrity LowData modification is possible but limited in scope or consequence
  • Availability NoneNo availability impact

Weaknesses

ATT&CK techniques

Mapped from the weaknesses above (CWE to ATT&CK), not observed in attacks.

Sources

References in the record

And 31 more references. See all after sign-in

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