CVE-2000-0032 in Solaris
Summary
by MITRE
Solaris dmi_cmd allows local users to crash the dmispd daemon by adding a malformed file to the /var/dmi/db database.
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Analysis
by VulDB Data Team • 01/13/2025
The vulnerability identified as CVE-2000-0032 resides within the Solaris operating system's dmi_cmd functionality, specifically targeting the dmispd daemon responsible for managing device management information. This flaw represents a classic buffer overflow condition that occurs when the system processes malformed database entries within the /var/dmi/db directory structure. The vulnerability stems from inadequate input validation mechanisms within the daemon's file processing routines, where the system fails to properly sanitize or verify the integrity of data stored in the DMI database. The issue manifests when local users manipulate the database by introducing corrupted or malformed entries that trigger unexpected behavior in the daemon's memory management subsystem.
The technical exploitation of this vulnerability leverages the inherent trust placed in local database files within the Solaris device management framework. When the dmispd daemon attempts to read and process the maliciously crafted file, it encounters malformed data structures that cause memory corruption during parsing operations. This memory corruption leads to the daemon's termination through segmentation faults or other abnormal program termination conditions. The flaw operates at the application layer within the system's device management services, making it particularly dangerous as it can be triggered by any local user with write access to the /var/dmi/db directory. The vulnerability demonstrates characteristics consistent with CWE-121, which describes stack-based buffer overflow conditions, though the specific implementation likely involves heap memory corruption during database processing operations.
The operational impact of this vulnerability extends beyond simple service disruption to potentially compromise system stability and availability within Solaris environments. Local users can leverage this flaw to perform denial-of-service attacks against the device management services, effectively rendering the system's hardware inventory and management capabilities unavailable. This disruption can cascade into broader system management issues, particularly in enterprise environments where device management information plays a critical role in system monitoring and maintenance operations. The vulnerability's local nature means that attackers do not require network access or elevated privileges beyond basic user accounts, making it particularly concerning for multi-user systems where privilege separation may be insufficient. Additionally, the daemon's restart behavior could potentially lead to information loss or inconsistent state management within the device management subsystem.
Mitigation strategies for CVE-2000-0032 should focus on both immediate protective measures and long-term system hardening approaches. System administrators should implement strict file access controls and permissions on the /var/dmi/db directory to limit write access to authorized system processes only. The implementation of file integrity monitoring solutions can help detect unauthorized modifications to critical database files. Regular system updates and patches from Sun Microsystems should be applied promptly to address the underlying buffer overflow conditions. Network segmentation and privilege separation techniques can help limit the potential impact of successful exploitation attempts. From an operational perspective, monitoring for abnormal daemon termination patterns and implementing automated service restart procedures can help maintain system availability. The vulnerability aligns with ATT&CK technique T1499 which covers endpoint denial of service attacks, and represents a classic example of how insufficient input validation can lead to system stability compromises. Organizations should also consider implementing comprehensive system logging to track database modifications and identify potential exploitation attempts.