CVE-2023-46264 — Avalanche
CRITICALCVE-2023-46264 is a critical-severity (CVSS 9.8) Unrestricted File Upload vulnerability in ivanti avalanche. EPSS puts its 30-day exploitation probability at 90.2% (100th percentile). A fix is available — see the affected versions and patch details below.
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.
Exploitation Status
No confirmed exploitation observed yet
- A successful exploit gives an attacker total control of the affected component, not partial access.
- CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.
Exploitation and automatability from CISA’s SSVC triage for CVE-2023-46264.
EPSS Exploitation Probability
Probability of exploitation in the next 30 days, from FIRST.org EPSS.
How urgent is this, really
CVE-2023-46264 by exploitation likelihood (EPSS) against impact (CVSS). In the shaded patch-first corner (EPSS 50%+, CVSS 7.0+).
Where this sits among everything scored
Of 397,508 CVEs with a current EPSS score, this one falls in the ≥ 90% band (highlighted). Counts from FIRST.org, log-scaled.
Description
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.
Affected Products
avalancheivantiDetection & mitigation playbook
Vendor / applianceDetect
Inventory every ivanti avalanche deployment and check each version against the affected-products list above.
Fix
Apply the ivanti avalanche security patch or hotfix for CVE-2023-46264 on the affected version, following the vendor advisory for your exact build.
Workarounds
Treat uploaded files as untrusted until proven otherwise: validate the actual content type rather than the supplied extension, store uploads outside the web root on a volume mounted without execute permission, and rename them to server-generated identifiers so an attacker cannot choose the path a request will later resolve. Alongside that, restrict the management interface to trusted networks and apply the vendor's recommended configuration mitigations.
Frequently Asked Questions
Is CVE-2023-46264 being exploited in your environment?
Detect and block the exploit chain at execution, on systems you cannot patch yet.