CVE-1999-1272 in IRIX
Summary
by MITRE
buffer overflows in cdrom confidence test program (cdrom) allow local users to gain root privileges.
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Analysis
by VulDB Data Team • 04/17/2026
The vulnerability identified as CVE-1999-1272 represents a critical buffer overflow flaw discovered in the cdrom confidence test program, which is part of the Linux operating system's cdrom subsystem. This particular vulnerability affects systems where the cdrom utility is installed and executable with appropriate privileges, creating an exploitable condition that allows local users to escalate their privileges to root level access. The flaw exists within the program's handling of input data during the confidence testing process for cdrom devices, where insufficient bounds checking permits malicious input to overwrite adjacent memory locations.
The technical implementation of this vulnerability stems from improper buffer management within the cdrom confidence test utility. When the program processes user-provided input during device detection and testing procedures, it fails to validate the length of input data against the allocated buffer size. This condition creates a classic buffer overflow scenario where an attacker can craft input that exceeds the buffer boundaries, potentially overwriting critical memory segments including return addresses, function pointers, or other control data. The vulnerability specifically manifests when local users execute the cdrom utility with elevated privileges or when the program is invoked with untrusted input from external sources.
The operational impact of CVE-1999-1272 extends beyond simple privilege escalation as it provides attackers with complete system control capabilities. Once a local user successfully exploits this vulnerability, they gain root privileges which enables them to modify system files, install malicious software, create new user accounts, and access all system resources without restriction. The attack vector is particularly concerning because it requires minimal prerequisites - simply having access to execute the cdrom utility with sufficient privileges to trigger the overflow condition. This vulnerability directly maps to CWE-121, which describes stack-based buffer overflow conditions, and aligns with ATT&CK technique T1068, which covers local privilege escalation through exploitation of system vulnerabilities. The risk is amplified in multi-user environments where local access might be more readily obtained through legitimate system usage patterns.
Mitigation strategies for this vulnerability involve multiple layers of defensive measures that address both immediate remediation and long-term system hardening. The most direct solution requires updating the affected cdrom utilities to versions that properly implement input validation and buffer size checking mechanisms, ensuring that all input data is strictly bounded and validated before processing. System administrators should also implement proper access controls to limit execution privileges of the cdrom utility, using capabilities-based restrictions or mandatory access controls to prevent unauthorized privilege escalation. Additionally, regular system auditing and monitoring should be implemented to detect anomalous execution patterns of the cdrom utility that might indicate exploitation attempts. The vulnerability demonstrates the importance of input validation and proper buffer management practices that align with secure coding standards and the principle of least privilege, which are fundamental concepts in cybersecurity defense strategies.