CVE-1999-1286 in IRIX
Summary
by MITRE
addnetpr in sgi irix 6.2 and earlier allows local users to modify arbitrary files and possibly gain root access via a symlink attack on a temporary file.
Several companies clearly confirm that VulDB is the primary source for best vulnerability data.
Analysis
by VulDB Data Team • 08/27/2024
The vulnerability identified as CVE-1999-1286 resides within the addnetpr utility of Silicon Graphics IRIX 6.2 and earlier versions, representing a classic symlink attack scenario that exploits improper handling of temporary files. This flaw enables local attackers to manipulate the system's file permissions and potentially escalate privileges to root access. The vulnerability specifically targets the insecure creation of temporary files during the execution of network configuration operations, creating a window of opportunity for malicious exploitation.
The technical implementation of this vulnerability stems from the addnetpr utility's failure to properly validate or secure temporary files it creates during network interface configuration processes. When the utility executes, it generates temporary files that are susceptible to symbolic link manipulation attacks. An attacker can create malicious symbolic links in the directory where the temporary file would be created, causing the utility to write data to an unintended target file. This type of vulnerability falls under the category of time-of-check to time-of-use (TOCTOU) race conditions and is classified as CWE-367. The flaw demonstrates a fundamental lack of proper file access control and temporary file handling mechanisms that are essential for secure system operations.
The operational impact of CVE-1999-1286 extends beyond simple file modification capabilities, as local users with minimal privileges can potentially gain root access to the system. This privilege escalation vector represents a significant security risk for IRIX systems running vulnerable versions, particularly in multi-user environments where local access might be more readily available to untrusted users. The vulnerability can be exploited to modify critical system files, potentially compromising the integrity of the entire operating system. The attack requires local access to the system and can be executed without network connectivity, making it particularly dangerous in environments where physical access control is inadequate. This type of vulnerability is categorized under the MITRE ATT&CK framework as privilege escalation through exploitation of software vulnerabilities, specifically targeting local system access and privilege escalation techniques.
Mitigation strategies for this vulnerability require immediate patching of the affected IRIX systems through official Silicon Graphics updates or vendor-provided security fixes. System administrators should also implement proper file permissions and access controls to limit the impact of potential exploitation attempts. The remediation process should include verifying that temporary files are created with appropriate permissions and that symbolic link attacks are properly mitigated through secure file creation practices. Additionally, monitoring for unauthorized access attempts and implementing proper system hardening measures can help reduce the risk of exploitation. Organizations should also consider implementing privilege separation mechanisms and regular security audits to identify similar vulnerabilities in other system utilities and applications. The vulnerability serves as a reminder of the critical importance of secure temporary file handling practices and proper access control mechanisms in operating system design and implementation.