CVE-2023-34834
Published: 29 June 2023
Summary
CVE-2023-34834 is a medium-severity Files or Directories Accessible to External Parties (CWE-552) vulnerability in Mcl-Collection Mcl-Net Firmware. Its CVSS base score is 5.3 (Medium).
Operationally, ranked in the top 12.5% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
Deeper analysis
CVE-2023-34834 is a directory browsing vulnerability in the webserver component of MCL-Net version 4.3.5.8788 running on default port 5080. The issue is present in the "/file" endpoint and permits exposure of sensitive information about configured databases. It carries a CVSS 3.1 score of 5.3 reflecting network attack vector, low complexity, and no required authentication or user interaction.
An unauthenticated remote attacker can send crafted requests to the affected endpoint and retrieve database configuration details that would otherwise remain inaccessible.
The EPSS score rose from lower values to a peak of 0.0889 on 2025-01-22 before receding to the current 0.0330, indicating a later surge in exploitation interest after the 2023 disclosure. Public exploit code for the issue is available on Exploit-DB.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2023-38875
Vulnerability details
A Directory Browsing vulnerability in MCL-Net version 4.3.5.8788 webserver running on default port 5080, allows attackers to gain sensitive information about the configured databases via the "/file" endpoint.
- CWE(s)
Related Threats
No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.
Affected Assets
Mitigating Controls
Likely Mitigating Controls AI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.
Controls on authorized publication limit files and directories with nonpublic data from becoming accessible to external parties.
Controlling and documenting P2P file sharing prevents files and directories from being made accessible to external parties for unauthorized distribution.
Identifying and documenting file and directory locations allows restriction of access to external parties.
Protecting backup files ensures they are not accessible to external parties or unauthorized spheres.
Sanitizing equipment before off-site maintenance reduces the risk of files or directories containing sensitive data becoming accessible to external parties.
Policy restricts media access to authorized parties only, preventing exposure of resources to external or unauthorized actors.
Media access restrictions prevent files or directories from being accessible to external parties.
Employing and evaluating controls at documented alternate sites makes files and directories less likely to be accessible to external parties through physical or environmental weaknesses.