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high advisory

Intel IPU, UEFI Reference Firmware: Multiple Vulnerabilities

A local attacker can exploit multiple vulnerabilities in Intel Firmware to disclose confidential information or gain elevated privileges.

Multiple vulnerabilities exist within Intel IPU and UEFI reference firmware that could be exploited by a local attacker. The specific versions affected and the exact nature of the vulnerabilities are not detailed in this advisory. However, successful exploitation could lead to the disclosure of sensitive information or the escalation of privileges on the targeted system. Defenders should monitor systems for suspicious local activity that could indicate exploitation of these firmware vulnerabilities.

Attack Chain

  1. Attacker gains initial local access to a system running vulnerable Intel firmware (IPU or UEFI Reference Firmware).
  2. Attacker executes a specially crafted program designed to interact with the vulnerable firmware components.
  3. The crafted program leverages a vulnerability to bypass security checks or access control mechanisms within the firmware.
  4. The vulnerability allows the attacker to read memory regions containing sensitive information, such as credentials or cryptographic keys.
  5. Alternatively, the attacker uses the vulnerability to modify firmware settings or inject malicious code into the firmware execution path.
  6. Modified firmware grants the attacker elevated privileges within the system, potentially allowing them to bypass operating system security controls.
  7. The attacker leverages the elevated privileges to access sensitive files, install malware, or perform other malicious activities.
  8. Attacker maintains persistence by exploiting the firmware vulnerabilities.

Impact

Successful exploitation of these vulnerabilities could allow a local attacker to gain complete control over the affected system. This could result in the theft of sensitive data, the installation of persistent malware, or the disruption of system operations. Since the vulnerable components are low-level firmware, the impact is significant, as it can bypass most operating system security measures.

Recommendation

  • Monitor process creation events for unusual or unsigned binaries attempting to access memory regions typically reserved for firmware components (covered by the process creation rule below).
  • Investigate any suspicious modifications to UEFI settings or firmware configurations.
  • Regularly update firmware to the latest versions provided by the vendor.

Detection coverage 2

Detect Suspicious Process Accessing Firmware Memory Regions

high

Detects processes attempting to directly access memory regions commonly associated with firmware components, which could indicate exploitation attempts.

sigma tactics: credential_access, privilege_escalation techniques: T1003, T1068 sources: process_creation, windows

Detect Suspicious Command Line Utilities Running from Unusual Locations

medium

Detects command-line utilities like cmd.exe or powershell.exe executing from temporary or unusual directories, potentially indicative of malicious activity after a local compromise.

sigma tactics: execution, privilege_escalation techniques: T1059.001, T1068 sources: process_creation, windows

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