Description

In MiracastService, there is a possible escalation of privilege due to a confused deputy. This could lead to local denial of service with User execution privileges needed. User interaction is not needed for exploitation. Patch ID: ALPS11060069 / DTV04881615; Issue ID: MSV-7882.

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "5.5",
  "pubDate": "2026-09-07T02:17:20.360Z",
  "pubdate": "2026-09-07T02:17:20.360Z",
  "executiveSummary": "This vulnerability, identified as MSV-7882, involves a confused deputy flaw within the MiracastService component. The defect permits an escalation of privilege originating from a local execution context, potentially resulting in a local denial of service (DoS) condition.\nThe vulnerability resides within the system's media casting architecture, which is susceptible to manipulation when internal interfaces fail to properly validate the origin or integrity of incoming requests. Exploitation does not require user interaction, lowering the barrier for local attackers to disrupt system stability.\nWhile the primary impact is identified as a local denial of service, the presence of a confused deputy mechanism suggests that the service performs privileged operations on behalf of an unprivileged process without sufficient access control checks. This could theoretically be leveraged by an attacker with local user privileges to force the MiracastService to perform unauthorized actions or trigger resource exhaustion.\nThe risk is categorized based on the necessity of local access, meaning an attacker must already have a foothold on the device to execute the exploit. The resolution of this issue is provided through Patch ID ALPS11060069 / DTV04881615.",
  "technicalDetails": "The root cause of this vulnerability is a 'confused deputy' flaw within the MiracastService. In this architectural pattern, a privileged component (the deputy) performs actions on behalf of a less privileged requestor without strictly validating the requestor's authorization or the context of the requested operation.\nThe vulnerability manifests when the MiracastService interfaces with lower-level system resources or hardware abstraction layers. An attacker with local User-level execution privileges can craft specific requests to the MiracastService that bypass intended security boundaries. Because the service operates with elevated permissions, it may be coerced into performing operations—such as improper resource allocation or state modification—that an unprivileged user would normally be forbidden from initiating.\nThe attack flow proceeds as follows: First, a malicious local process identifies the communication channels or Binder interfaces exposed by the MiracastService. Second, the attacker sends a malformed or out-of-sequence IPC (Inter-Process Communication) message to the service. Because the service fails to verify the context of the caller against the requested operation, it proceeds to execute the task using its own higher-level credentials.\nThis execution path ultimately leads to an unstable state within the service. By triggering specific code paths that handle resource management or media stream initialization, the attacker can induce a deadlock, memory corruption, or service termination, resulting in a local denial of service. The lack of requirement for user interaction indicates that the service processes these requests autonomously upon receipt, making it vulnerable to automated local exploitation scripts.\nThe vulnerability effectively leverages the MiracastService's trust in the incoming IPC traffic to manipulate state data or trigger resource exhaustion that the service's internal safeguards are not equipped to handle. Post-exploitation, the service may hang or crash, necessitating a restart to regain casting functionality. The reliance on this confused deputy model indicates an insufficient implementation of caller validation within the service's request handling logic, allowing local attackers to influence service behavior in ways that violate security policies."
}