NetSarang v5.0 Malicious Backdoor Supply Chain Compromise_CVE-2025-34252

9.5 / 10

CRITICAL

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

Description

NetSarang Xmanager Enterprise 5.0 Build 1232, Xmanager 5.0 Build 1045, Xshell 5.0 Build 1322, Xftp 5.0 Build 1218, and Xlpd 5.0 Build 1220 contain a malicious nssock2.dll that implements a multi-stage, DNS-based backdoor. The dormant library contacts a C2 DNS server via a specially crafted TXT record for a month‑generated domain. After receiving a decryption key, it then downloads and executes arbitrary code, creates an encrypted virtual file system (VFS) in the registry, and grants the attacker full remote code execution, data exfiltration, and persistence. NetSarang released builds for each product line that remediated the compromise: Xmanager Enterprise Build 1236, Xmanager Build 1049, Xshell Build 1326, Xftp Build 1222, and Xlpd Build 1224. Kaspersky Lab identified an instance of exploitation in the wild in August 2017.

Basic Information

ID CVE-2025-34252

Source VulnCheck

Published Oct 7, 2025 at 21:01

Affected Product

Vendor NetSarang Computer, Inc.

Product Xmanager Enterprise

Version 5.0 Build 1232

Affected Versions NetSarang Computer, Inc. Xmanager Enterprise 5.0 Build 1232
NetSarang Computer, Inc. Xmanager 5.0 Build 1045
NetSarang Computer, Inc. Xshell 5.0 Build 1322
NetSarang Computer, Inc. Xftp 5.0 Build 1218
NetSarang Computer, Inc. Xlpd 5.0 Build 1220

CWE Classification

CWE-506

References

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    "published": "2025-10-07T21:01:40.739Z",
    "modified": "2025-10-07T21:01:40.739Z",
    "type": "cve",
    "title": "NetSarang v5.0 Malicious Backdoor Supply Chain Compromise",
    "source": "VulnCheck",
    "references": "https://web.archive.org/web/20181022035109/https://www.netsarang.com/news/security_exploit_in_july_18_2017_build.html\nhttps://usa.kaspersky.com/about/press-releases/shadowpad-attackers-hid-backdoor-in-software-used-by-hundreds-of-large-companies-worldwide\nhttps://securelist.com/shadowpad-in-corporate-networks/81432/\nhttps://www.vulncheck.com/advisories/netsarang-malicious-backdoor-supply-chain-compromise",
    "id": "CVE-2025-34252",
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    "cvelist": null,
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