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CVE-2023-46388 LOYTEC electronics GmbH CVE debrief

LOYTEC electronics GmbH LINX-212 6.2.4 and LINX-151 7.2.4 contain an insecure permissions vulnerability in the dpal_config.zml file. This configuration weakness enables remote attackers to extract SMTP client account credentials and subsequently bypass email authentication mechanisms. The vulnerability carries a HIGH severity CVSS 3.1 score of 7.5 (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N), indicating network-accessible exploitation with low complexity and no required privileges or user interaction, resulting in high confidentiality impact. CISA published advisory ICSA-24-247-01 on September 3, 2024, documenting this issue alongside related vulnerabilities. LOYTEC has committed to remediation through firmware version 8.2.8, which implements encrypted storage of SMTP credentials. The affected product scope extends beyond the initially identified LINX-212 and LINX-151 devices to include LVIS-3ME12-A1, LIOB-586, LIOB-580 V2, LIOB-588, and L-INX Configurator, all requiring the same firmware update. Organizations operating these industrial control system components should prioritize patching given the credential disclosure risk and potential for email authentication bypass, which could facilitate further compromise through trusted communication channels.

Vendor
LOYTEC electronics GmbH
Product
LINX-151
CVSS
HIGH 7.5
CISA KEV
Not listed in stored evidence
Original CVE published
2024-09-03
Original CVE updated
2024-09-03
Advisory published
2024-09-03
Advisory updated
2024-09-03

Who should care

Organizations deploying LOYTEC LINX-212, LINX-151, LVIS-3ME12-A1, LIOB-586, LIOB-580 V2, LIOB-588, or L-INX Configurator in building automation, industrial control, or critical infrastructure environments where email-based alerting and notification systems are integrated.

Technical summary

The dpal_config.zml file on affected LOYTEC devices carries insecure permissions that expose SMTP client credentials to remote attackers. Successful exploitation enables authentication bypass for email services. LOYTEC firmware 8.2.8 remediates through encrypted credential storage.

Defensive priority

HIGH

Recommended defensive actions

  • Update affected LOYTEC devices to firmware version 8.2.8 to obtain encrypted SMTP credential storage
  • Review SMTP account configurations for unauthorized access or anomalous email activity
  • Audit network segmentation between LOYTEC devices and untrusted networks to limit exposure
  • Monitor for unauthorized access attempts targeting dpal_config.zml or related configuration files
  • Apply CISA ICS recommended practices for defense-in-depth security architecture
  • Validate email authentication mechanisms do not rely solely on credentials stored on affected devices

Evidence notes

Vulnerability description and affected product versions derived from CISA CSAF advisory ICSA-24-247-01. CVSS 3.1 vector AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N confirmed in source metadata. Remediation guidance specifies firmware version 8.2.8 with encrypted SMTP credential storage. Seven product IDs identified as affected: CSAFPID-0001 through CSAFPID-0007.

Sources and references

Verified primary and authoritative sources

  • CVE-2023-46388 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2023-46388

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2023-46388 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2023-46388

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

  • Source item URL

    Unverified legacy reference

    URL: https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/OT/white/2024/icsa-24-247-01.json

    cisa_csaf

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/news-events/ics-advisories/icsa-24-247-01

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/uscert/ics/alerts/ICS-ALERT-10-301-01

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/resources-tools/resources/ics-recommended-practices

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/sites/default/files/publications/Cybersecurity_Best_Practices_for_Industrial_Control_Systems.pdf

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/topics/industrial-control-systems

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/uscert/sites/default/files/publications/emailscams0905.pdf

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/uscert/ncas/tips/ST04-014

    Reference

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.