CVE-2024-0939
Published: 26 January 2024
Summary
CVE-2024-0939 is a medium-severity Unrestricted Upload of File with Dangerous Type (CWE-434) vulnerability in Byzoro Smart S210 Firmware. Its CVSS base score is 6.3 (Medium).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked in the top 0.5% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
Deeper analysis
A vulnerability classified under CWE-434 has been identified in the Byzoro Smart S210 Management Platform up to version 20240117. It resides in the unknown code of the file /Tool/uploadfile.php, where manipulation of the file_upload argument permits unrestricted file uploads. The issue carries a CVSS 3.1 score of 6.3 and was publicly disclosed under VDB-252184 after the vendor failed to respond to early notification.
Remote attackers who possess low-privileged credentials can initiate the attack over the network without user interaction. Successful exploitation allows upload of arbitrary files, which can result in limited impacts to confidentiality, integrity, and availability on the affected management platform.
Public references, including detailed exploit descriptions on GitHub and Vuldb entries, contain no information on official patches or mitigations, consistent with the vendor's lack of response. The associated EPSS score has reached a peak of 0.8887 with a current value of 0.8752, indicating sustained exploitation interest following disclosure.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2024-16718
Vulnerability details
A vulnerability has been found in Byzoro Smart S210 Management Platform up to 20240117 and classified as critical. This vulnerability affects unknown code of the file /Tool/uploadfile.php. The manipulation of the argument file_upload leads to unrestricted upload. The attack can…
more
be initiated remotely. The exploit has been disclosed to the public and may be used. The identifier of this vulnerability is VDB-252184. NOTE: The vendor was contacted early about this disclosure but did not respond in any way.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Unrestricted file upload in public-facing web management platform (T1190: Exploit Public-Facing Application) enables uploading web shells for execution (T1505.003: Web Shell) and staging tools (T1608.002: Upload Tool).
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.
Requiring identifiable owners for portable devices reduces the attack surface for unrestricted uploads of dangerous file types via anonymous media.
Dangerous file uploads can be detonated in the chamber to determine malice before any production write or execution occurs.
Prevents unrestricted writing of arbitrary or malicious firmware by keeping hardware write-protect enabled except under tightly controlled manual procedures.
Scans files from external sources on download/open/execute, blocking unrestricted uploads of dangerous file types.