CVE-2023-38951
CriticalCVSS 9.8Exploitation Probability (EPSS)
High risk87th percentile - higher than 87% of all known CVEs
Summary
A vulnerability in ZKTeco BioTime 8.5.5 through 9.x before 9.0.1 (20240617.19506) allows authenticated attackers to create or overwrite arbitrary files on the server. It exploits a path traversal issue in the Username field and lack of input sanitization on the SSH Key field in /base/sftpsetting/ endpoints.
Risk Assessment
An attacker can overwrite critical system files, potentially leading to remote code execution as NT AUTHORITY\SYSTEM, resulting in full server compromise.
Recommendation
Immediately update ZKTeco BioTime to version 9.0.1 (20240617.19506) or later. If updating is not possible, restrict access to /base/sftpsetting/ endpoints to trusted IP addresses only.
Original NVD description (English source)
ZKTeco BioTime 8.5.5 through 9.x before 9.0.1 (20240617.19506) allows authenticated attackers to create or overwrite arbitrary files on the server via crafted requests to /base/sftpsetting/ endpoints that abuse a path traversal issue in the Username field and a lack of input sanitization on the SSH Key field. Overwriting specific files may lead to arbitrary code execution as NT AUTHORITY\SYSTEM.