CVE-2023-32560 — Avalanche
CRITICALCVE-2023-32560 is a critical-severity (CVSS 9.8) Out-of-bounds Write vulnerability in ivanti avalanche. 2 public exploit references exist, so weaponization risk is real. A fix is available — see the affected versions and patch details below.
An attacker can send a specially crafted message to the Wavelink Avalanche Manager, which could result in service disruption or arbitrary code execution. Thanks to a Researcher at…
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-2023-32560.
EPSS Exploitation Probability
Probability of exploitation in the next 30 days, from FIRST.org EPSS.
How urgent is this, really
CVE-2023-32560 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 394,415 CVEs with a current EPSS score, this one falls in the ≥ 90% band (highlighted). Counts from FIRST.org, log-scaled.
Description
An attacker can send a specially crafted message to the Wavelink Avalanche Manager, which could result in service disruption or arbitrary code execution.
Thanks to a Researcher at Tenable for finding and reporting.
Fixed in version 6.4.1.
Affected Products
avalancheivantiResearch use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.
Ivanti Avalanche <v6.4.0.0 - Remote Code Execution
by Robel Campbell · Sep 4, 2023
Detection & 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-2023-32560 on the affected version, following the vendor advisory for your exact build.
Workarounds
Constrain what reaches the vulnerable code: limit the size and shape of untrusted input, isolate the affected component in a sandboxed or least-privileged process, and enable the platform's memory-safety mitigations (ASLR, stack protector, hardened allocator) so an out-of-bounds access is more likely to fail closed than to be exploitable. Alongside that, restrict the management interface to trusted networks and apply the vendor's recommended configuration mitigations.
Frequently Asked Questions
Is CVE-2023-32560 being exploited in your environment?
Detect and block the exploit chain at execution, on systems you cannot patch yet.