CVE-2023-28128
Published: 09 May 2023
Summary
CVE-2023-28128 is a high-severity Unrestricted Upload of File with Dangerous Type (CWE-434) vulnerability in Ivanti Avalanche. Its CVSS base score is 7.2 (High).
Operationally, 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
An unrestricted upload of a file with a dangerous type, identified as CWE-434, affects Ivanti Avalanche versions 6.3.x and below. The flaw permits an attacker to upload arbitrary content that can be executed on the server, resulting in remote code execution. It carries a CVSS 3.1 base score of 7.2 with the vector AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.
An authenticated attacker with high privileges can reach the vulnerable FileStoreConfig component over the network and upload a malicious file to obtain code execution on the affected system. Successful exploitation grants the attacker the ability to run arbitrary commands with the privileges of the Avalanche service.
Public disclosures under ZDI-CAN-17812 and accompanying PacketStorm entries describe the FileStoreConfig arbitrary file upload path that leads to remote code execution. The EPSS score has reached a peak of 0.8889 with a current value of 0.8797, indicating sustained exploitation interest following publication.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2023-31839
Vulnerability details
An unrestricted upload of file with dangerous type vulnerability exists in Avalanche versions 6.3.x and below that could allow an attacker to achieve a remove code execution.
- 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.