CVE-1999-0049 in IRIX
Summary
by MITRE
csetup under irix allows arbitrary file creation or overwriting.
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Analysis
by VulDB Data Team • 04/16/2026
The vulnerability identified as CVE-1999-0049 affects the csetup utility within the IRIX operating system, representing a critical security flaw that enables unauthorized file manipulation through improper input validation. This issue specifically targets the csetup component which is responsible for configuring system settings and managing various system parameters. The vulnerability stems from insufficient validation of user-supplied input parameters that are processed by the csetup utility, allowing attackers to manipulate the file system through crafted inputs that bypass normal access controls. The flaw exists in the handling of file paths and creation operations within the system configuration framework, where the utility fails to properly sanitize or validate the destination paths for file operations.
The technical implementation of this vulnerability allows an attacker to specify arbitrary file paths during the configuration process, potentially leading to the creation of files in privileged directories or the overwriting of existing system files with malicious content. This type of vulnerability falls under the category of insecure file handling as defined by CWE-73, which specifically addresses the issue of file paths that are not properly validated or sanitized. The csetup utility operates with elevated privileges during system configuration, making this vulnerability particularly dangerous as it could enable privilege escalation or system compromise. The flaw demonstrates characteristics of path traversal attacks where the attacker can manipulate the file system by injecting malicious path specifications into the utility's parameter processing.
The operational impact of this vulnerability extends beyond simple file manipulation, as it can be leveraged to achieve more severe security consequences within the IRIX environment. An attacker could potentially overwrite critical system configuration files, create backdoor files in privileged directories, or establish persistent access mechanisms through the manipulation of configuration data. This vulnerability directly affects the integrity and confidentiality of the system configuration process, as it undermines the trust model that should exist between legitimate system administrators and the configuration utilities they use. The potential for privilege escalation exists when the csetup utility executes with elevated privileges, making this a particularly dangerous flaw in the context of system security. According to ATT&CK framework, this vulnerability maps to T1059.007 for command and scripting interpreter and T1546.001 for system binary proxy, as it could enable attackers to manipulate system files through legitimate administrative tools.
Mitigation strategies for CVE-1999-0049 should focus on immediate patching of the affected IRIX systems, as well as implementing restrictive access controls for the csetup utility and related configuration components. System administrators should conduct thorough audits of system configuration files to identify any potential malicious modifications that may have occurred due to this vulnerability. The implementation of input validation mechanisms and proper path sanitization within the csetup utility would prevent exploitation of this flaw, while monitoring for unusual file creation or modification patterns could help detect exploitation attempts. Organizations should also consider implementing least privilege principles for system configuration utilities, ensuring that only authorized administrators have access to these tools and that appropriate logging and auditing measures are in place to track configuration changes. Additionally, network segmentation and access controls should be implemented to limit the attack surface and prevent unauthorized access to systems running vulnerable versions of IRIX.