CVE-2023-4420

Published Aug 24, 2023 CVSS 3.1 · 9.8 Critical EPSS < 1% KEV · Not listed
Description
A remote unprivileged attacker can intercept the communication via e.g. Man-In-The-Middle, due to the absence of Transport Layer Security (TLS) in the SICK LMS5xx. This lack of encryption in the communication channel can lead to the unauthorized disclosure of sensitive information. The attacker can exploit this weakness to eavesdrop on the communication between the LMS5xx and the Client, and potentially manipulate the data being transmitted.

Remediation

Vendor Workaround

Please make sure that you apply general security practices when operating the LMS5xx. The following General Security Practices and Operating Guidelines could mitigate the associated security risk. It is also recommended to apply the security practices listed in the LMS5xx hardening guide.

Tracking

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Advisories

Source ID Title
EUVD EUVD EUVD-2023-54283 A remote unprivileged attacker can intercept the communication via e.g. Man-In-The-Middle, due to the absence of Transport Layer Security (TLS) in the SICK LMS5xx. This lack of encryption in the communication channel can lead to the unauthorized disclosure of sensitive information. The attacker can exploit this weakness to eavesdrop on the communication between the LMS5xx and the Client, and potentially manipulate the data being transmitted.
History
Type Values Removed Values Added
First Time appeared Sick lms5xx
CPEs cpe:2.3:h:sick_ag:lms5xx:*:*:*:*:*:*:*:* cpe:2.3:h:sick:lms5xx:*:*:*:*:*:*:*:*
Vendors & Products Sick Ag
Sick Ag lms5xx
Sick lms5xx
Type Values Removed Values Added
First Time appeared Sick Ag
Sick Ag lms5xx
CPEs cpe:2.3:h:sick_ag:lms5xx:*:*:*:*:*:*:*:*
Vendors & Products Sick Ag
Sick Ag lms5xx
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
SICK AG
Published
Updated
Jun 1, 2026, 12:15 PM
Reserved
Aug 18, 2023, 1:09 PM
Status
Modified
Published
Aug 24, 2023, 7:15 PM
Modified
Jun 17, 2026, 6:37 AM