EUVD-2025-17085
CVSS Vector
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Lifecycle Timeline
3Description
Authentication bypass vulnerability in the DSoftBus module Impact: Successful exploitation of this vulnerability may affect availability.
Analysis
CVE-2025-48906 is an authentication bypass vulnerability in the DSoftBus module that allows unauthenticated attackers on the local network to completely compromise system confidentiality, integrity, and availability without user interaction. The vulnerability affects DSoftBus implementations across multiple platforms with a CVSS score of 8.8, indicating critical severity with high exploitability potential on adjacent networks.
Technical Context
DSoftBus is a distributed soft bus communication module used for inter-process communication and service discovery in various operating systems and IoT platforms. The vulnerability root cause is classified under CWE-290 (Authentication Using a Broken or Risky Cryptographic Algorithm), indicating the authentication mechanism either uses insufficient cryptographic protections, lacks proper validation, or can be circumvented through cryptographic weaknesses. The adjacent network attack vector (AV:A) suggests the flaw exists in network-based authentication handshakes or credential validation during service discovery or RPC mechanisms within DSoftBus. The low attack complexity (AC:L) and no privilege requirement (PR:N) indicate this is a fundamental design flaw rather than edge-case exploitation requiring specific conditions.
Affected Products
DSoftBus module implementations including but not limited to: OpenHarmony devices and derivatives, Huawei HarmonyOS systems, and any third-party implementations of DSoftBus protocol. Specific affected versions require vendor advisory cross-reference; however, all DSoftBus versions implementing the vulnerable authentication mechanism are at risk. CPE identifiers likely include: cpe:2.3:a:openharmony:dsoftbus:*:*:*:*:*:*:*:* (all versions pre-patch). Vendor advisories should specify version cutoffs and platform-specific impact (mobile, IoT, embedded systems).
Remediation
Immediate actions: (1) Isolate DSoftBus-enabled devices from untrusted network segments; implement strict network segmentation and firewall rules limiting DSoftBus traffic to authorized hosts only; (2) Monitor for vendor security advisories from OpenHarmony, Huawei, and device manufacturers for patched versions; (3) Patch to latest DSoftBus versions once vendors release security updates addressing CWE-290 (expected to implement cryptographically sound authentication, mutual authentication, or capability-based authorization); (4) Temporary workarounds include disabling DSoftBus if not essential, restricting network access via iptables/firewall rules to trusted peers, or implementing application-level authentication overlays. Vendor patch links and specific version updates must be obtained from official OpenHarmony security advisories and device manufacturer security bulletins.
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External POC / Exploit Code
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