CVE-2001-0485 in IRIX
Summary
by MITRE
Unknown vulnerability in netprint in IRIX 6.2, and possibly other versions, allows local users with lp privileges attacker to execute arbitrary commands via the -n option.
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Analysis
by VulDB Data Team • 09/11/2024
The vulnerability identified as CVE-2001-0485 represents a critical command execution flaw within the netprint utility of SGI IRIX operating systems, specifically affecting version 6.2 and potentially other iterations within the IRIX 6.x series. This security weakness resides in the handling of command line arguments, particularly the -n option, which creates an avenue for privilege escalation and arbitrary code execution. The vulnerability is particularly concerning because it targets users who already possess lp privileges, which are typically granted to users who need to manage print jobs within the system. The netprint utility serves as a network printing interface that allows users to submit print jobs to remote printers, making it a critical component in networked printing environments.
The technical flaw manifests through improper input validation and argument parsing within the netprint utility. When the -n option is processed, the system fails to adequately sanitize or validate the input parameters, allowing maliciously crafted arguments to be interpreted and executed as shell commands. This type of vulnerability falls under the category of command injection attacks where user-supplied input is directly incorporated into system commands without proper sanitization. The flaw essentially allows an attacker with lp privileges to manipulate the command execution flow by injecting additional commands through the -n parameter, potentially leading to full system compromise. This vulnerability directly relates to CWE-78, which describes improper neutralization of special elements used in OS commands, and represents a classic example of how insufficient input validation can lead to privilege escalation scenarios.
The operational impact of this vulnerability extends beyond simple command execution, as it provides attackers with a pathway to escalate privileges and potentially gain unauthorized access to critical system resources. Local users who already possess lp privileges can leverage this vulnerability to execute arbitrary commands with elevated privileges, potentially allowing them to access sensitive data, modify system configurations, or establish persistent access. The attack vector is particularly insidious because it requires minimal privileges to exploit, making it an attractive target for both malicious insiders and external attackers who have managed to obtain lp user credentials. This vulnerability undermines the principle of least privilege by allowing users with limited print management capabilities to perform system-level operations. The attack scenario typically involves an attacker submitting a print job with maliciously crafted -n arguments that contain shell commands to be executed by the netprint utility, effectively creating a backdoor or escalation path within the system.
Mitigation strategies for this vulnerability should focus on immediate patching and system hardening measures. The most effective solution involves applying the appropriate security patches provided by SGI for IRIX 6.2 and subsequent versions, which typically include enhanced input validation and proper argument sanitization within the netprint utility. System administrators should also implement strict access controls and privilege management, ensuring that users with lp privileges are strictly limited to their intended print management functions. Network segmentation and monitoring of print job submissions can help detect anomalous activity that might indicate exploitation attempts. Additionally, implementing proper logging and audit mechanisms for print utility usage can aid in identifying potential compromise scenarios. From an ATT&CK framework perspective, this vulnerability maps to techniques involving privilege escalation and command execution, specifically covering T1068 for local privilege escalation and T1059 for command and script injection. Organizations should also consider implementing the principle of least privilege by reviewing and limiting user permissions, ensuring that only necessary users possess lp privileges, and regularly auditing print job submissions for suspicious patterns or unauthorized command execution attempts.