CVE-2021-31844: High Vulnerability in McAfee Data Loss Prevention Endpoint

CVE-2021-31844 is a buffer overflow vulnerability affecting McAfee Data Loss Prevention (DLP) Endpoint for Windows versions prior to 11.6.200. This vulnerability allows a local attacker to execute arbitrary code with elevated privileges. The exploitation occurs when an attacker places specially crafted Ami Pro (.sam) files onto the local system and triggers a DLP Endpoint scan by accessing a file. The root cause is a fixed-size destination buffer that fails to perform adequate checks on the source size, leading to potential arbitrary code execution.

The CVSS score for this vulnerability is 8.2, indicating a high severity level. This score reflects the local attack vector, low complexity, and the requirement for user interaction. Given the potential for significant confidentiality, integrity, and availability impacts, organizations must treat this vulnerability with urgency.

As of now, there are no known exploits or public proof of concepts for CVE-2021-31844. However, the potential for exploitation remains a concern due to its high severity. Organizations using affected versions of McAfee DLP Endpoint should prioritize remediation to prevent possible attacks.

Organizations should prioritize patching immediately. Ensuring systems are updated to the latest version will mitigate the risks associated with this vulnerability.

Vulnerability Details

CVE-2021-31844 is classified as a buffer overflow vulnerability in McAfee Data Loss Prevention (DLP) Endpoint for Windows. The vulnerability allows local attackers to execute arbitrary code with elevated privileges by exploiting fixed-size buffer limitations.

The vulnerability has a CVSS score of 8.2, which falls under the high severity category, indicating a significant risk to organizations. The affected product is McAfee DLP Endpoint, specifically versions prior to 11.6.200. The vulnerability was published on September 17, 2021, and is classified under CWE-120.

Technical Analysis

The root cause of CVE-2021-31844 lies in a buffer overflow condition, where the destination buffer's fixed size leads to inadequate checks on the source size. This flaw can be exploited by local attackers through simple file manipulation.

The attack vector for this vulnerability is local, requiring low complexity and low privileges. User interaction is necessary, as the attacker needs to trigger a DLP Endpoint scan by accessing the manipulated file. The impact can be severe as it compromises confidentiality, integrity, and availability.

Risk & Impact Analysis

Risk to organizations includes significant potential for unauthorized access and control over sensitive data. The vulnerability allows attackers to execute arbitrary code, which could lead to extensive data breaches and operational disruptions. Given the high CVSS score and the nature of the exploit, organizations must consider the blast radius and prioritize remediation efforts.

The urgency for organizations to address this vulnerability is critical; systems running vulnerable versions of McAfee DLP Endpoint should be patched immediately to mitigate potential risks.

Exploitation Status

Affected Versions

The vulnerability affects all versions of McAfee Data Loss Prevention Endpoint prior to version 11.6.200. Organizations should ensure that they update to this version or later to mitigate this vulnerability.

Mitigation & Remediation

To remediate CVE-2021-31844, organizations should apply the latest patches provided by McAfee for the Data Loss Prevention Endpoint. The recommended version to upgrade to is 11.6.200 or later. If the patch is unavailable, organizations should implement configuration hardening measures, such as restricting user permissions and conducting regular security audits.

For continuous monitoring and vulnerability management, organizations are encouraged to engage in continuous security testing to identify any similar weaknesses.

Detection Guidance

Organizations should monitor logs for indicators of exploitation attempts related to this vulnerability. Key indicators may include unusual file access patterns, particularly involving Ami Pro (.sam) files, and any anomalies during DLP Endpoint scans.

AppSecure Threat Intelligence Insight

The long-term significance of CVE-2021-31844 is reflective of the challenges in software security, particularly in buffer management. As organizations increasingly rely on endpoint protection solutions, the patterns of vulnerabilities like these emphasize the need for robust testing and validation processes.

Organizations can learn from this vulnerability by instituting comprehensive security measures, including penetration testing methodologies to proactively identify and mitigate potential vulnerabilities.

In conclusion, the strategic takeaway from CVE-2021-31844 is the importance of timely patching and regular security assessments to fortify defenses against evolving threats.