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ICSA-24-137-06: Siemens SIMATIC CN 4100 ↗ source

May 16, 2024 CISA ICS Advisory

Summary

SIMATIC CN 4100 is vulnerable to use of hard coded credentials including root user and contains an unrestricted USB port that could be misused for insecure boot. Siemens has released a new version for SIMATIC CN 4100 and recommends to update to the latest version. CVE-2024-32740: The affected device contains undocumented users and credentials. An attacker could misuse the credentials to compromise the device locally or over the network. CVE-2024-32741: The affected device contains hard coded password which is used for the privileged system user `root` and for the boot loader `GRUB` by default . An attacker who manages to crack the password hash gains root access to the device. CVE-2024-32742: The affected device contains an unrestricted USB port. An attacker with local access to the device could potentially misuse the port for booting another operating system and gain complete read/write access to the filesystem.

Advisory Details CISA ICS CSAF feed

Advisory ID
ICSA-24-137-06
Status
Final · version 1
Initial release
2024-05-14
Last revised
2024-05-14
Vendor
Siemens
Critical infrastructure sectors
Multiple
Deployed
Worldwide
Vendor headquarters
Germany

Republished vendor advisory. This CISA CSAF advisory was converted from Siemens ProductCERT's CSAF advisory.

General Recommendations: 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. Additional information on Industrial Security by Siemens can be found at: https://www.siemens.com/industrialsecurity

Additional Resources: For further inquiries on security vulnerabilities in Siemens products and solutions, please contact the Siemens ProductCERT: https://www.siemens.com/cert/advisories

Credit: Siemens ProductCERT

Affected products (1)
  • SIMATIC CN 4100 — <V3.0

From CISA's machine-readable CSAF 2.0 advisory (JSON).

Vulnerabilities as Stated by the Advisory

CVEWeaknessCVSS v3Details
CVE-2024-32741 CWE-259 Use of Hard-coded Password 10.0 Critical CVE-2024-32741
The affected device contains hard coded password which is used for the privileged system user `root` and for the boot loader `GRUB` by default . An attacker who manages to crack the password hash gains root access to the device.

Vendor fix: Update to V3.0 or later version

Affected, fixed & timeline

Affected:

  • SIMATIC CN 4100 <V3.0
CVE-2024-32740 CWE-798 Use of Hard-coded Credentials 9.8 Critical CVE-2024-32740
The affected device contains undocumented users and credentials. An attacker could misuse the credentials to compromise the device locally or over the network.

Vendor fix: Update to V3.0 or later version

Affected, fixed & timeline

Affected:

  • SIMATIC CN 4100 <V3.0
CVE-2024-32742 CWE-1326 Missing Immutable Root of Trust in Hardware 7.6 High CVE-2024-32742
The affected device contains an unrestricted USB port. An attacker with local access to the device could potentially misuse the port for booting another operating system and gain complete read/write access to the filesystem.

Vendor fix: Update to V3.0 or later version

Affected, fixed & timeline

Affected:

  • SIMATIC CN 4100 <V3.0

Scores and weakness types are as CISA or the republishing vendor stated them in this advisory; the linked CVE pages carry the independently enriched CVSS and SSVC assessments.

News Coverage

No coverage found in monitored research blogs or news feeds.

CVEs Referenced in This Publication

CVECVSSAffected
CVE-2024-32741 10.0 Critical Siemens SIMATIC CN 4100 A vulnerability has been identified in SIMATIC CN 4100 (All versions < V3.0). The affected device contains hard coded password which is used for the …
CVE-2024-32740 9.8 Critical Siemens SIMATIC CN 4100 A vulnerability has been identified in SIMATIC CN 4100 (All versions < V3.0). The affected device contains undocumented users and credentials. An att…
CVE-2024-32742 7.6 High Siemens SIMATIC CN 4100 A vulnerability has been identified in SIMATIC CN 4100 (All versions < V3.0). The affected device contains an unrestricted USB port. An attacker with…

Named by the advisory itself. Each CVE links to its tracked detail page.

Vendors Named in This Publication

Each vendor links to its Known Exploited Vulnerabilities catalog page. Only vendors that appear in the KEV catalog are listed, either because the publication cites one of their KEV entries or because it names them directly.