Dell WMI System Management Security Password Exposure

Executive Summary

This vulnerability in the Linux kernel involves the dell-wmi-sysman module exposing plaintext admin passwords in kernel logs. The set_attribute() function writes the admin password into a security buffer and then dumps the entire request buffer, including the password, via print_hex_dump_bytes(). This allows sensitive credentials to be logged and potentially accessed by unauthorized users.

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Detection Guidance

Check kernel logs for plaintext admin password exposure in BIOS attribute requests. Search for hex dumps or security buffer contents in logs using commands like 'dmesg | grep -i password' or 'journalctl -k | grep -i hex'.

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Impact Analysis

If exploited, this vulnerability could allow attackers with access to kernel logs to retrieve plaintext admin passwords. This may lead to unauthorized system access, privilege escalation, or further compromise of the affected system. Users should update their Linux kernel to a patched version immediately.

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Compliance Impact

This vulnerability could violate compliance requirements under GDPR and HIPAA by exposing sensitive administrative credentials. GDPR mandates protection of personal data, while HIPAA requires safeguarding protected health information. Unauthorized access to admin passwords may result in data breaches, leading to legal penalties and reputational damage.

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Mitigation Strategies

Update the Linux kernel to the patched version where the issue is resolved. Monitor kernel logs for any signs of plaintext password exposure and restrict access to logs containing sensitive data.

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