CVE-2023-32564
Published: 10 August 2023
Summary
CVE-2023-32564 is a critical-severity Unrestricted Upload of File with Dangerous Type (CWE-434) vulnerability in Ivanti Avalanche. Its CVSS base score is 9.8 (Critical).
Operationally, ranked in the top 2.0% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.
Deeper analysis
CVE-2023-32564 is an unrestricted file upload vulnerability (CWE-434) affecting Ivanti Avalanche versions 6.4.1 and earlier. The flaw permits an attacker to upload files of arbitrary dangerous types to the server, which can then be executed to achieve remote code execution on the underlying system.
The vulnerability can be exploited remotely over the network by an unauthenticated attacker. With a CVSS score of 9.8 reflecting no required privileges or user interaction, successful exploitation grants full control over the affected Avalanche instance, including the ability to run arbitrary code, access sensitive data, or pivot further into the environment.
The referenced Ivanti advisory indicates that the issue was addressed in Avalanche 6.4.1, directing customers to apply the corresponding update to eliminate the unrestricted upload vector.
The associated EPSS score of 0.5316 reflects substantial observed exploitation interest following disclosure.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2023-36808
Vulnerability details
An unrestricted upload of file with dangerous type vulnerability exists in Avalanche versions 6.4.1 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.