This indicates an attack attempt to exploit a Directory Traversal Vulnerability in Ivanti Avalanche.
This vulnerability is due to a insufficient validation of input in the DeviceLogResource class for the Smart Device Server. A remote attacker could exploit this vulnerability by sending crafted requests to the target server. Successfully exploiting this vulnerability could result in remote code execution in the context of SYSTEM.
Ivanti Avalanche prior to 6.3.4
System Compromise: Remote attackers can gain control of vulnerable systems.
Apply the most recent upgrade or patch from the vendor.