CVE-2004-1390 in RTOS
Summary
by MITRE
Multiple buffer overflows in the PPPoE daemon (PPPoEd) in QNX RTP 6.1 allow remote attackers to execute arbitrary code via a long argument to the (1) -F, (2) name, (3) en, (4) upscript, (5) downscript, (6) retries, (7) timeout, (8) scriptdetach, (9) noscript, (10) nodetach, (11) remote_mac, or (12) local_mac flags.
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Analysis
by VulDB Data Team • 11/21/2024
The vulnerability identified as CVE-2004-1390 represents a critical buffer overflow condition within the PPPoE daemon component of QNX RTP 6.1 operating system. This daemon serves as the primary implementation for Point-to-Point Protocol over Ethernet functionality, enabling network connections through Ethernet interfaces. The flaw manifests in the daemon's insufficient input validation mechanisms when processing command-line arguments, creating opportunities for malicious actors to exploit memory corruption vulnerabilities. The vulnerability affects multiple flags within the daemon's argument parsing logic, including fundamental operational parameters such as -F, name, en, upscript, downscript, retries, timeout, scriptdetach, noscript, nodetach, remote_mac, and local_mac, which are essential for configuring PPPoE connections.
The technical exploitation of this vulnerability stems from the daemon's failure to properly bounds-check input data when processing each of the specified command-line flags. When an attacker provides excessively long argument values to any of these parameters, the daemon's memory allocation routines fail to prevent overflow conditions that can overwrite adjacent memory segments. This memory corruption directly enables arbitrary code execution capabilities, as the overflow can overwrite critical program control structures including return addresses and function pointers. The vulnerability aligns with CWE-121, which describes heap-based buffer overflow conditions, and CWE-122, which covers stack-based buffer overflow scenarios. The attack vector is classified as remote, meaning exploitation can occur without physical access to the target system, making it particularly dangerous in networked environments.
The operational impact of this vulnerability extends beyond simple privilege escalation or denial of service conditions. Successful exploitation allows remote attackers to execute arbitrary code with the privileges of the PPPoE daemon process, which typically runs with elevated system permissions. This could lead to complete system compromise, unauthorized network access, data exfiltration, or establishment of persistent backdoors. The vulnerability affects systems running QNX RTP 6.1 that utilize PPPoE connectivity, which was common in embedded systems, network appliances, and telecommunications equipment of that era. The daemon's widespread use in network infrastructure makes this vulnerability particularly concerning from a cybersecurity perspective, as it could potentially be leveraged to attack critical network components. According to ATT&CK framework, this vulnerability maps to T1059.007 for command and scripting interpreter and T1068 for exploit for privilege escalation, representing both execution and privilege escalation attack patterns.
Mitigation strategies for CVE-2004-1390 require immediate system updates and configuration hardening measures. The primary recommendation involves applying the vendor-supplied patches or upgrading to QNX RTP versions that address this vulnerability. System administrators should also implement network segmentation and access controls to limit exposure of affected systems to untrusted networks. Input validation should be strengthened at the application level, and the daemon should be configured to run with minimal required privileges. Network monitoring solutions should be deployed to detect anomalous argument patterns that might indicate exploitation attempts. Additionally, organizations should conduct comprehensive vulnerability assessments to identify all systems running QNX RTP 6.1 and ensure proper patch management protocols are in place to prevent similar vulnerabilities from remaining unaddressed in the future. The vulnerability serves as a reminder of the critical importance of proper input validation and memory management in network daemon implementations, particularly in embedded systems where security updates may be infrequent or delayed.