by Kastro CVE-2023-54398
Yonyou U8 Cloud — Yonyou U8 Cloud Java Deserialization RCE via FileManageServlet
Description · from the CVE record
Yonyou U8 Cloud contains an unauthenticated Java deserialization vulnerability in the nc.impl.pub.filesystem.FileManageServlet component that allows remote unauthenticated attackers to execute arbitrary OS commands by sending a serialized payload via POST request. Attackers can exploit the doAction method, which passes raw HTTP request body data directly to ObjectInputStream.readObject() without filtering, to achieve remote code execution. Exploitation evidence was first observed by the Shadowserver Foundation on 2025-02-13.
Affected
ProductAffectedFixed inSource
U8 Cloud1.0–CNA
U8 Cloud2.0–CNA
U8 Cloud2.1–CNA
U8 Cloud2.3–CNA
U8 Cloud2.5–CNA
U8 Cloud2.6–CNA
U8 Cloud2.65–CNA
U8 Cloud2.7–CNA
U8 Cloud3.0–CNA
U8 Cloud3.1–CNA
U8 Cloud3.2–CNA
U8 Cloud3.5–CNA
Scores by source
VulnCheck (CNA)9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
VulnCheck (CNA)9.3CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CISA ADPSSVCExploitation: poc · Automatable: yes · Technical impact: total