Dell PowerEdge BIOS and Dell Precision BIOS contain an Improper SMM communication buffer verification vulnerability. This vulnerability allows a local malicious user with high privileges to potentially exploit this vulnerability to perform arbitrary code execution or cause denial of service. With a CVSS score of 1.9, this vulnerability is classified as low. However, even low-severity vulnerabilities can present real-world risks, particularly when they involve local system access and high privileges.
The urgency for defenders is moderate. Organizations should schedule remediation to address this vulnerability, especially given that it can lead to significant impacts if exploited. The potential for denial of service or arbitrary code execution means that local attackers could leverage this vulnerability to affect system stability or compromise sensitive operations.
As of now, there is no public exploit confirmed for this vulnerability, and it is not listed in the Known Exploited Vulnerabilities (KEV) catalog. This indicates a lower likelihood of immediate exploitation in the wild, but organizations should not become complacent.
Organizations utilizing affected systems must stay vigilant and consider upgrading to patched versions of the firmware as soon as feasible.
Vulnerability Details
The vulnerability in question has been identified as CWE-119, which relates to an improper verification of a communication buffer in the BIOS. Affected products include multiple Dell PowerEdge and Precision BIOS versions, particularly those prior to firmware version 2.9.3 or 2.16.1, depending on the specific model.
The CVSS score reported by NVD is 6.7, indicating a medium severity classification. This score reflects the potential impacts on confidentiality, integrity, and availability, each categorized as high or low depending on the attack vector. The attack vector for this vulnerability is local, requiring high privileges and no user interaction.
Technical Analysis
The root cause of this vulnerability lies in the improper verification of the SMM communication buffer. This oversight allows for arbitrary code execution when exploited by a local attacker. Given the high complexity of the attack, it is likely that a knowledgeable individual with high privileges would need to execute it successfully.
The attack vector is local, meaning that an attacker must have access to the physical machine. The complexity of the attack is considered high, and it requires high privileges, thus limiting the potential attacker pool. User interaction is not required, which increases the risk if an attacker can gain local access.
Impacts on confidentiality and integrity are reported to be none, while availability is affected at a low level. This indicates that exploitation would not compromise the data but could disrupt service availability.
Risk & Impact Analysis
Risk to organizations includes potential service disruption and the ability for an attacker to execute unauthorized code. Although the vulnerability is classified as low in severity, the impact can still be significant in environments where sensitive operations are conducted.
The blast radius is limited primarily to the affected systems, but if exploited, it could lead to broader implications depending on the attacker’s capabilities and intentions. Organizations must assess their environments to understand the urgency based on their specific configurations and potential exposure.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
All versions prior to vendor patch are affected, particularly those firmware versions below 2.9.3 for several models. Organizations should refer to the specific product documentation for detailed guidance on affected components.
Mitigation & Remediation
To remediate this vulnerability, organizations should apply the patches provided by Dell as outlined in the vendor advisory. For more information on the patching process, consult the official Dell support page.
Continuous penetration testing can help identify similar vulnerabilities.
Detection Guidance
Organizations should monitor system logs for any unauthorized access attempts and behavioral anomalies related to BIOS operations. Specific attention should be given to any sudden changes in firmware behavior that may indicate exploitation attempts.
AppSecure Threat Intelligence Insight
This vulnerability highlights an ongoing trend in firmware vulnerabilities that can be exploited locally by users with high privileges. Organizations must maintain robust security practices and consider penetration testing methodologies as a proactive measure against such vulnerabilities.
Engaging in vulnerability management programs can enhance an organization’s ability to respond to emerging threats effectively.
Finally, organizations should also consider the insights gained from API security best practices to further strengthen their defenses against potential local exploits.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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