PatchSiren

PatchSiren cyber security CVE debrief

CVE-2023-46383 LOYTEC electronics GmbH CVE debrief

LOYTEC electronics GmbH LINX Configurator 7.4.10 transmits authentication credentials using HTTP Basic Authentication, which encodes usernames and passwords in base64—a reversible encoding that provides no cryptographic protection. Remote attackers positioned to intercept network traffic can capture these credentials and obtain full administrative control over affected LOYTEC device configurations. The vulnerability affects seven product variants across the LINX series, LVIS, and LIOB product families. CISA published this advisory on September 3, 2024, as ICSA-24-247-01. The vendor has released version 8.2.8 to address this issue and recommends disabling HTTP in accordance with their security hardening guidance.

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 operating LOYTEC building automation, HVAC control, or industrial IoT systems; OT security teams managing LINX-151, LINX-212, LVIS-3ME12-A1, LIOB-586, LIOB-580 V2, or LIOB-588 devices; facility managers with LOYTEC deployments; and critical infrastructure operators with LOYTEC components in their control networks.

Technical summary

The L-INX Configurator and related LOYTEC devices use HTTP Basic Authentication for administrative access. This authentication scheme transmits credentials encoded with base64, which is trivially reversible and provides no confidentiality protection. An attacker with network visibility to device management traffic can extract valid credentials and authenticate to the device configuration interface, gaining full control. The vulnerability is remotely exploitable without authentication and requires no user interaction.

Defensive priority

HIGH

Recommended defensive actions

  • Update affected LOYTEC devices to version 8.2.8 or later
  • Disable HTTP on affected LOYTEC devices per the vendor's security hardening guide
  • Implement network segmentation to limit exposure of LOYTEC device management interfaces
  • Monitor for unauthorized configuration changes on LOYTEC devices
  • Review and rotate credentials for affected devices if HTTP was previously enabled

Evidence notes

CISA CSAF advisory ICSA-24-247-01 identifies HTTP Basic Authentication as the vulnerable mechanism, with base64-encoded credential transmission enabling credential theft. CVSS 3.1 score of 7.5 (HIGH) reflects network attack vector, low attack complexity, and no required privileges or user interaction.

Sources and references

Verified primary and authoritative sources

  • CVE-2023-46383 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2023-46383

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

  • CVE-2023-46383 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2023-46383

    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.