CVE-2026-18449 in X12SPI
Summary
by MITRE • 10/27/2026
The BMC does not correctly enforce integrity and encryption requirements for IPMI commands. An attacker may be able to craft packets that execute arbitrary commands on an active session.
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Analysis
by VulDB Data Team • 10/27/2026
This vulnerability represents a critical failure in the Baseboard Management Controller's implementation of the Intelligent Platform Management Interface protocol, specifically concerning the enforcement of security controls defined by the DMTF IPMI specification. The core technical flaw lies in the BMC's inability to properly validate the integrity and encryption parameters associated with incoming management commands. In a secure configuration, IPMI sessions should utilize either HMAC-based message authentication codes for integrity verification or AES-128/256 encryption for confidentiality, depending on the negotiated cipher suite. However, due to this implementation defect, the BMC fails to reject packets that lack valid cryptographic signatures or are transmitted in plaintext when such protections were explicitly required by the session context. This allows an attacker who has established a network connection with the management interface to bypass these security mechanisms entirely.
The operational impact of this flaw is severe, as it effectively nullifies the authentication and integrity guarantees provided by IPMI v2.0 and later standards. An adversary positioned on the same subnet or capable of intercepting traffic between a remote console and the BMC can craft malicious packets that appear to be part of an active session but lack proper cryptographic validation. By exploiting this weakness, the attacker can execute arbitrary commands with the privileges associated with the compromised session account. This capability extends beyond simple information disclosure; it enables direct manipulation of hardware-level settings, including power state control, firmware updates, and sensor configuration changes. Such actions can lead to service denial through forced reboots or shutdowns, as well as potential persistence mechanisms if malicious firmware images are uploaded during an update process.
From a threat modeling perspective, this vulnerability aligns with CWE-347 Improper Verification of Cryptographic Signature, indicating that the system does not adequately verify digital signatures before processing sensitive operations. Furthermore, it maps to MITRE ATT&CK technique T1059 Command and Scripting Interpreter, as the attacker gains the ability to inject commands into the management plane. The lack of encryption enforcement also relates to CWE-319 Cleartext Transmission of Sensitive Information if the session was intended to be private but is instead exposed in plaintext due to the BMC's failure to enforce the negotiated cipher suite. This creates a significant attack surface for lateral movement within data centers, where IPMI interfaces are often accessible from multiple network segments and trusted by administrators who may not monitor management traffic closely.
Mitigation strategies must focus on both immediate remediation and long-term architectural improvements. The primary defense is to apply vendor-provided firmware updates that correct the BMC's logic for validating integrity tags and enforcing encryption requirements during session establishment. Until patches are available, organizations should restrict network access to IPMI interfaces using strict firewall rules, limiting connectivity only to authorized jump hosts or dedicated management VLANs with no external exposure. Additionally, administrators should disable unused user accounts on the BMC and enforce strong passwords for remaining active sessions. Where possible, migrating from legacy IPMI implementations to more modern out-of-band management solutions that support mutual authentication and robust encryption standards can further reduce risk. Regular auditing of BMC logs for unusual command execution patterns is also recommended to detect potential exploitation attempts early in the kill chain.