Overview
CVE-2025-26454 represents a serious vulnerability in the validateUriSchemeAndPermission function found in DisclaimersParserImpl.java. This vulnerability allows unauthorized access to user data, potentially leading to local privilege escalation. This can occur without the need for additional execution privileges or user interaction, posing a significant threat to all systems utilizing this software.
Vulnerability Summary
CVE ID: CVE-2025-26454
Severity: High (7.8 CVSS Score)
Attack Vector: Local
Privileges Required: None
User Interaction: None
Impact: Unauthorized access to user data, potential system compromise or data leakage
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Product | Affected Versions
DisclaimersParserImpl.java | All versions up to the latest
How the Exploit Works
The vulnerability lies in the validateUriSchemeAndPermission function. This function does not correctly validate permissions, leading to a confused deputy scenario. In this scenario, an entity is tricked into misusing its authority, hence allowing an attacker to escalate their privileges on the local system. An attacker could exploit this vulnerability to access data from another user, leading to potential information disclosure, system compromise, or data leakage.
Conceptual Example Code
// Conceptual exploit of CVE-2025-26454
try {
// Assume the attacker has access to the system and can execute this code
Uri maliciousUri = new Uri.Builder().scheme("file").path("/data/user/0/<victim_app>/files/").build();
validateUriSchemeAndPermission(maliciousUri); // Exploits the confused deputy in validateUriSchemeAndPermission
// The attacker now has access to sensitive user data
} catch (Exception e) {
// Handle exception
}Please note that the above code is a conceptual representation of the exploit and might not work as is.
Mitigation Guidance
To mitigate the vulnerability, users are advised to apply the vendor patch once it is available. In the meantime, using a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can serve as a temporary mitigation strategy. These tools can monitor and potentially block malicious activities, reducing the risk of exploitation.
