CVE-2023-0455
Published: 26 January 2023
Summary
CVE-2023-0455 is a high-severity Unrestricted Upload of File with Dangerous Type (CWE-434) vulnerability in Bumsys Project Bumsys. Its CVSS base score is 8.8 (High).
Operationally, ranked in the top 8.6% 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-2023-0455 is an unrestricted upload of a file with dangerous type vulnerability, assigned CWE-434, that affects the unilogies/bumsys business management system in GitHub prior to version 1.0.3-beta. The flaw received a CVSS 3.1 score of 8.8 and permits an authenticated remote attacker to upload arbitrary file types without server-side validation.
An attacker with low-privileged credentials can exploit the issue over the network to upload and execute malicious files such as web shells, resulting in full confidentiality, integrity, and availability impact on the affected system. Public proof-of-concept material, including a shell-upload exploit posted to Packet Storm, demonstrates the attack path against the vulnerable application.
The referenced GitHub commit a5beff7868ab63bf4ec752a1102f8da033c66b28 implements the fix, so administrators should upgrade to bumsys 1.0.3-beta or later. The associated EPSS score rose from a low baseline to a peak of 0.1163 before receding to its current value of 0.0667, indicating a period of increased exploitation interest after disclosure.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2023-12509
Vulnerability details
Unrestricted Upload of File with Dangerous Type in GitHub repository unilogies/bumsys prior to v1.0.3-beta.
- 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.
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.