CVE-2023-46264
Published: 19 December 2023
Summary
CVE-2023-46264 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 1.5% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.
Deeper analysis
CVE-2023-46264 is an unrestricted file upload vulnerability (CWE-434) affecting Ivanti Avalanche (formerly Wavelink Avalanche) versions 6.4.1 and earlier. The flaw permits upload of files with dangerous types, which can be leveraged for remote code execution on the server. It carries a CVSS 3.1 base score of 9.8 with a network attack vector, no required authentication or user interaction, and full impact on confidentiality, integrity, and availability.
An unauthenticated attacker with network access can upload and execute arbitrary code, resulting in complete compromise of the affected Avalanche instance. The vulnerability is exploitable remotely without any credentials or user assistance.
The vendor release notes for Avalanche 6.4.2 address the issue and indicate that upgrading to version 6.4.2 or later mitigates the vulnerability. The associated EPSS score has remained stable at 0.6508 with no material increase after disclosure.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2023-50491
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.