A vulnerability in h2oai/h2o-3 version 3.46.0.1 allows remote attackers to write arbitrary data to any file on the server. This is achieved by exploiting the /3/Parse endpoint to inject attacker-controlled data as the header of an empty file, which is then exported using the /3/Frames/framename/export endpoint. The impact of this vulnerability includes the potential for remote code execution and complete access to the system running h2o-3, as attackers can overwrite critical files such as private SSH keys or script files.
Exploitability
AV:NAC:LPR:NUI:NScope
S:UImpact
C:NI:HA:H9.1/CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:HInput Validation