A remote unprivileged attacker can intercept the communication via e.g.
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Information disclosure
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-311.
Summary
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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| SICK AG | LMS5xx | all firmware versions and later | — | No fix listed | CNA |
- LMS5xx VendorSICK AG Affected all firmware versions and later Fixed in — No fix listed CNA
CPE configurations NVD · 6
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:sick:lms531_firmware:*:*:*:*:*:*:*:* | all versions | Vulnerable | SICK AG |
| cpe:2.3:h:sick:lms531:-:*:*:*:*:*:*:* | not specified by NVD | Running on | SICK AG |
| cpe:2.3:o:sick:lms511_firmware:*:*:*:*:*:*:*:* | all versions | Vulnerable | SICK AG |
| cpe:2.3:h:sick:lms511:-:*:*:*:*:*:*:* | not specified by NVD | Running on | SICK AG |
| cpe:2.3:o:sick:lms500_firmware:*:*:*:*:*:*:*:* | all versions | Vulnerable | SICK AG |
| cpe:2.3:h:sick:lms500:-:*:*:*:*:*:*:* | not specified by NVD | Running on | SICK AG |
- cpe:2.3:o:sick:lms531_firmware:*:*:*:*:*:*:*:* Versions all versions Vulnerable ·SICK AG
- cpe:2.3:h:sick:lms531:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·SICK AG
- cpe:2.3:o:sick:lms511_firmware:*:*:*:*:*:*:*:* Versions all versions Vulnerable ·SICK AG
- cpe:2.3:h:sick:lms511:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·SICK AG
- cpe:2.3:o:sick:lms500_firmware:*:*:*:*:*:*:*:* Versions all versions Vulnerable ·SICK AG
- cpe:2.3:h:sick:lms500:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·SICK AG
Remediation
No fixed version listed by the sources yet.
Fixed in the same release
Records fixed by the same vendor advisory or release, as the CNA lists them.
- Advisory ·
SICK LMS5xx — sick.com/.well-known/csaf/white/2023/sca-2023-0007.pdf
4 records Highest priority Priority MEDIUM 3 MEDIUM, 1 LOW
Other records, highest priority first
- TI-2023-04079 Hard-coded credentials in SICK AG LMS5xxPriority MEDIUM 45
- TI-2023-04078 Uncontrolled resource consumption in SICK AG LMS5xxPriority MEDIUM 40
- TI-2023-15030 The LMS5xx uses weak hash generation methods, resulting in the creation of insecure hashs.Priority LOW 39
Timeline
- 2026-10-02 Threatist record created from CVE-2023-4420
- 2026-10-03 Alias added: GHSA-f3xg-jgh3-jw7h
References
More SICK AG Lms500 Firmware vulnerabilities
- TI-2023-04079 Hard-coded credentials in SICK AG LMS5xx CVSS 3.1CRITICAL 9.8
- TI-2023-04078 Uncontrolled resource consumption in SICK AG LMS5xx CVSS 3.1HIGH 7.5
- TI-2023-15030 The LMS5xx uses weak hash generation methods, resulting in the creation of insecure hashs. CVSS 3.1HIGH 7.5
- TI-2020-01963 Improper handling of exceptional conditions in Bulkscan LMS111; Bulkscan LMS511; CLV62x… CVSS 3.1HIGH 7.5
Sources
- CVE-2023-4420 · CVE Program
- CVE-2023-4420 · NVD
- FIRST EPSS
- GHSA-f3xg-jgh3-jw7h · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences