CVE-2000-0316 in Solaris
Summary
by MITRE
Buffer overflow in Solaris 7 lp allows local users to gain root privileges via a long -d option.
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Analysis
by VulDB Data Team • 01/16/2025
The vulnerability described in CVE-2000-0316 represents a critical buffer overflow flaw within the Solaris 7 printing subsystem, specifically affecting the lp command utility. This issue arises from inadequate input validation when processing the -d option parameter, creating an exploitable condition that enables local attackers to escalate their privileges to the root level. The lp command serves as the primary interface for managing print jobs in Solaris systems, making this vulnerability particularly dangerous as it directly impacts the system's core printing functionality. The buffer overflow occurs when the command processes a specially crafted long argument for the -d option, causing memory corruption that can be leveraged to execute arbitrary code with elevated privileges.
The technical exploitation of this vulnerability stems from the classic buffer overflow pattern where insufficient bounds checking allows an attacker to overwrite adjacent memory locations in the lp command's execution environment. When the -d option receives an excessively long string parameter, the command's internal buffer cannot accommodate the input, leading to memory corruption that may overwrite return addresses or other critical program state information. This type of vulnerability falls under CWE-121, which categorizes buffer overflow conditions where insufficient bounds checking permits memory to be overwritten, and aligns with ATT&CK technique T1068 which covers the exploitation of system privileges through local privilege escalation. The flaw demonstrates a fundamental lack of input sanitization in the command line argument processing logic, where the lp utility fails to properly validate the length of user-supplied arguments before copying them into fixed-size buffers.
The operational impact of this vulnerability extends beyond simple privilege escalation, as it provides attackers with complete control over the affected Solaris system. Local users who can execute the lp command can leverage this flaw to gain root access, potentially leading to unauthorized system compromise, data exfiltration, or further network infiltration. The vulnerability is particularly concerning in multi-user environments where unprivileged users might have access to the printing subsystem, as it creates an implicit backdoor for privilege escalation. Systems running Solaris 7 with default configurations are immediately at risk, as the lp command is typically available to standard users for print job management. The attack vector requires local system access but does not need network connectivity, making it particularly stealthy and difficult to detect through traditional network monitoring approaches.
Mitigation strategies for CVE-2000-0316 should focus on immediate patch application from Oracle, as this vulnerability was addressed through official security updates for Solaris 7. System administrators should implement strict input validation measures and consider disabling unnecessary print functionality for untrusted users. The principle of least privilege should be enforced by limiting user access to the lp command and monitoring print job execution. Additionally, organizations should conduct comprehensive vulnerability assessments to identify other potential buffer overflow conditions in legacy Solaris components, as this vulnerability demonstrates the ongoing risks associated with older system software. Network segmentation and access controls should be implemented to minimize the attack surface, while security monitoring should include detection of unusual print job patterns that might indicate exploitation attempts. The vulnerability underscores the importance of maintaining current security patches and demonstrates how seemingly minor input validation flaws can lead to complete system compromise.