CVE-2003-0630 in Atari 800 Emulator
Summary
by MITRE
Multiple buffer overflows in the atari800.svgalib setuid program of the Atari 800 emulator (atari800) before 1.2.2 allow local users to gain privileges via long command line arguments, as demonstrated with the -osa_rom argument.
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Analysis
by VulDB Data Team • 06/29/2021
The vulnerability described in CVE-2003-0630 represents a critical privilege escalation flaw within the Atari 800 emulator software ecosystem. This issue affects the atari800.svgalib setuid program, which is designed to run with elevated privileges to access hardware resources required for proper emulation functionality. The vulnerability specifically manifests through buffer overflow conditions that occur when processing command line arguments, creating an exploitable condition that allows local attackers to bypass normal access controls and elevate their system privileges. The flaw is particularly concerning because it leverages the inherent trust placed in setuid programs, which are expected to operate with elevated permissions while maintaining security boundaries.
The technical implementation of this vulnerability stems from inadequate input validation within the command line argument parsing mechanism of the atari800.svgalib component. When users provide excessively long command line arguments, particularly the -osa_rom argument demonstrated in the exploit, the program fails to properly bounds-check the input data before copying it into fixed-size buffers. This classic buffer overflow condition allows attackers to overwrite adjacent memory locations, potentially including return addresses or other critical program state information. The vulnerability is classified as a CWE-121 heap-based buffer overflow, where insufficient bounds checking enables memory corruption that can be exploited to execute arbitrary code with the privileges of the setuid program. The use of the -osa_rom argument specifically demonstrates how a single command line parameter can trigger the overflow condition, making it a targeted attack vector.
The operational impact of this vulnerability extends beyond simple privilege escalation, as it provides attackers with a pathway to gain root or administrator level access to systems running vulnerable versions of the Atari 800 emulator. Since the vulnerable program runs with elevated privileges, successful exploitation can result in complete system compromise, allowing attackers to install malware, modify system files, or establish persistent backdoors. The local nature of this vulnerability means that any user with access to the system can potentially exploit it, making it particularly dangerous in multi-user environments or when the emulator is installed on systems with regular user access. This type of vulnerability directly maps to ATT&CK technique T1068, which covers privilege escalation through local exploitation of software vulnerabilities, and represents a common attack pattern that has been frequently exploited in various system compromise scenarios throughout the history of computer security.
Mitigation strategies for this vulnerability require immediate patching of the atari800 emulator to version 1.2.2 or later, which contains the necessary input validation fixes to prevent the buffer overflow conditions. System administrators should also implement additional security measures such as restricting execution permissions for setuid programs and monitoring for unusual command line argument patterns that might indicate exploitation attempts. The vulnerability highlights the importance of proper input validation and bounds checking in security-critical applications, particularly those operating with elevated privileges. Organizations should conduct comprehensive vulnerability assessments to identify other setuid programs that may be susceptible to similar buffer overflow conditions, as these represent high-value targets for attackers seeking privilege escalation. Additionally, implementing defense-in-depth strategies such as privilege separation, code review processes, and runtime monitoring can help prevent exploitation of similar vulnerabilities in the future, aligning with the security principles outlined in the CWE guidelines for preventing buffer overflow attacks.