CVE-1999-0765 in IRIX
Summary
by MITRE
SGI IRIX midikeys program allows local users to modify arbitrary files via a text editor.
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Analysis
by VulDB Data Team • 09/04/2024
The vulnerability identified as CVE-1999-0765 resides within the SGI IRIX midikeys program, a multimedia application designed for handling MIDI input on Silicon Graphics workstations. This flaw represents a classic path traversal and privilege escalation vulnerability that exploits the program's improper handling of file operations. The vulnerability specifically affects local users who can leverage the midikeys program to gain unauthorized access to modify arbitrary files on the system, potentially compromising the integrity of critical system resources.
The technical implementation of this vulnerability stems from the midikeys program's failure to properly validate file paths and permissions when invoking external text editors. When the program processes MIDI input or configuration files, it may execute external editor commands without adequate sanitization of user-supplied input. This creates an opportunity for local attackers to manipulate the program's behavior by crafting malicious input that causes the system to open or modify files outside of intended directories. The vulnerability operates under CWE-22 which classifies path traversal flaws, and specifically aligns with ATT&CK technique T1059.001 for command and scripting interpreter execution. The flaw essentially allows attackers to bypass normal file access controls by exploiting how the program constructs and executes external commands.
The operational impact of this vulnerability extends beyond simple file modification capabilities, as it can enable attackers to compromise system integrity and potentially escalate privileges. Local users who can execute the midikeys program can leverage this weakness to modify system configuration files, replace critical binaries, or inject malicious code into the system. The vulnerability particularly affects environments where IRIX systems are deployed with multiple users, as it provides a low-effort method for privilege escalation. Attackers can exploit this to modify system files such as password databases, configuration scripts, or even replace system utilities with malicious versions. The risk is compounded by the fact that the vulnerability requires minimal privileges to exploit, making it particularly dangerous in multi-user environments where users may have legitimate access to the midikeys program.
Mitigation strategies for CVE-1999-0765 should focus on both immediate remediation and long-term system hardening. The most effective immediate solution involves patching the midikeys program with proper input validation and privilege restriction mechanisms. System administrators should implement strict file access controls and ensure that the midikeys program operates with minimal required privileges. The system should be configured to prevent the program from executing external editors with elevated permissions, and all file paths should be validated against a whitelist of acceptable locations. Additionally, implementing proper logging and monitoring of file access patterns can help detect exploitation attempts. Organizations should also consider disabling the midikeys program if it is not essential to their operations, as this eliminates the attack surface entirely. The vulnerability demonstrates the critical importance of proper input validation and privilege separation in system design, aligning with security best practices outlined in NIST SP 800-171 and ISO 27001 standards for secure system development and operation.