CVE-2026-33554
Description
A flaw was found in FreeIPMI. The ipmi-oem program is used to send Intelligent Platform Management Interface (IPMI) OEM commands for specific hardware vendors to retrieve specific information from the hardware. A malicious server can reply with crafted response messages and cause buffer overflows when processed, potentially resulting in a denial of service and memory corruption.
Statement
To exploit this vulnerability, a user needs to execute the ipmi-oem program to retrieve information from a compromised or malicious Baseboard Management Controller (BMC) server, limiting the exposure of this flaw.
Specifically, the following ipmi-oem commands are vulnerable to this issue:
- ipmi-oem dell get-last-post-code
- ipmi-oem supermicro extra-firmware-info
- ipmi-oem wistron read-proprietary-string
Default Red Hat Enterprise Linux security features, including SELinux enforcement, Address Space Layout Randomization (ASLR) and NX (No-Execute) stack protection, significantly increase the difficulty of achieving arbitrary code execution, limiting the impact of this vulnerability.
Due to these reasons, this flaw has been rated with a moderate severity.
Mitigation
To mitigate this issue, ensure all BMCs and the servers running FreeIPMI are isolated on a dedicated and restricted network environment.
Common Vulnerability Scoring System (CVSS) Score Details
Info alert:Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 8.8 | N/A | 7.5 |
| Attack Vector | Network | N/A | Network |
| Attack Complexity | Low | N/A | Low |
| Privileges Required | None | N/A | None |
| User Interaction | Required | N/A | None |
| Scope | Unchanged | N/A | Unchanged |
| Confidentiality | High | N/A | None |
| Integrity Impact | High | N/A | None |
| Availability Impact | High | N/A | High |
Vector
Red Hat: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
cve.org: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Understanding the Weakness (CWE)
Integrity,Confidentiality,Availability
Technical Impact: Modify Memory; Execute Unauthorized Code or Commands
Buffer overflows often can be used to execute arbitrary code, which is usually outside the scope of the product's implicit security policy. This can often be used to subvert any other security service.
Availability
Technical Impact: Modify Memory; DoS: Crash, Exit, or Restart; DoS: Resource Consumption (CPU)
Buffer overflows generally lead to crashes. Other attacks leading to lack of availability are possible, including putting the product into an infinite loop.
Frequently Asked Questions
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