Overview
CVE-2025-26438 is a serious vulnerability that resides in the implementation of the Secure Simple Pairing (SMP) protocol in smp_act.cc’s smp_process_secure_connection_oob_data. This flaw can potentially lead to remote escalation of privileges without the need for additional execution privileges or user interaction. This makes it an attractive target for malicious actors who seek to exploit such a loophole in their quest to compromise systems. It is critical to address such vulnerabilities promptly as they pose significant threats to data integrity, confidentiality, and system availability.
Vulnerability Summary
CVE ID: CVE-2025-26438
Severity: High (CVSS: 8.8)
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: Potential for system compromise and data leakage
Affected Products
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Product | Affected Versions
TBD | TBD
TBD | TBD
(Note: Affected products and versions are hypothetical as there is no specific information about the products affected by this vulnerability.)
How the Exploit Works
The root of the problem lies in the incorrect implementation of the SMP protocol. An attacker can exploit this flaw by sending specifically crafted packets to the target system. Due to the incorrect implementation of the protocol, the system fails to properly authenticate the incoming packets, allowing an attacker to bypass the SMP authentication. This can potentially lead to the escalation of privileges, allowing the attacker to execute commands or access resources that are typically beyond their scope.
Conceptual Example Code
Below is a hypothetical example of how the vulnerability might be exploited. This is a conceptual demonstration and is not actual working code.
POST /smp_process_secure_connection_oob_data HTTP/1.1
Host: target.example.com
Content-Type: application/x-www-form-urlencoded
{ "malicious_payload": "specially_crafted_packet_to_bypass_authentication" }In this example, the attacker sends a specially crafted packet disguised as legitimate data. The system, due to the incorrect implementation of the SMP protocol, fails to authenticate the packet properly, thus granting the attacker access to the system.
To mitigate this vulnerability, it is recommended to apply the vendor’s patch or use a Web Application Firewall (WAF) or Intrusion Detection System (IDS) as a temporary mitigation measure. However, these are not long-term solutions and upgrading to a patched version of the software is highly recommended.
