CVE-2004-0454 in rlprd
Summary
by MITRE
buffer overflow in the msg function for rlpr daemon (rlprd) 2.04 allows local users to execute arbitrary code.
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Analysis
by VulDB Data Team • 06/30/2021
The vulnerability identified as CVE-2004-0454 represents a critical buffer overflow flaw within the rlpr daemon version 2.04, specifically affecting the msg function implementation. This daemon serves as a print server component that handles printer job processing and communication, making it a potential attack vector for privilege escalation within networked printing environments. The buffer overflow occurs when the rlprd daemon processes incoming messages through its msg function, where insufficient input validation and boundary checking allows attackers to overwrite adjacent memory regions with malicious data. This particular vulnerability is classified as a local privilege escalation vector since it requires local system access to exploit, though the implications extend beyond simple local execution to potentially compromise entire print server infrastructures.
The technical nature of this buffer overflow stems from improper handling of message data within the rlprd daemon's message processing loop. When the msg function receives input data, it fails to properly validate the length of incoming buffers, allowing attackers to exceed allocated memory boundaries. This flaw directly maps to CWE-121, which describes stack-based buffer overflow conditions where insufficient boundary checks permit data to overwrite adjacent stack memory locations. The vulnerability exploits the fundamental principle that the daemon does not enforce strict input length limits before copying data into fixed-size buffers, creating opportunities for attackers to inject malicious code sequences that overwrite return addresses or other critical program state information. The attack vector is particularly dangerous because it can be leveraged to execute arbitrary code with the privileges of the rlprd daemon process, which typically runs with elevated system permissions.
Operationally, this vulnerability poses significant risks to organizations relying on rlpr print server implementations, particularly those with local user access to systems running the affected daemon. The impact extends beyond immediate code execution to potential system compromise through privilege escalation pathways, as attackers could leverage the elevated privileges of the rlprd process to access sensitive system resources or manipulate print job processing. The local nature of the exploit means that attackers must first gain access to the system through other means, but once inside, they can utilize this vulnerability to establish persistent access or escalate privileges to root or administrator levels. This vulnerability aligns with ATT&CK technique T1068, which covers local privilege escalation through exploitation of software vulnerabilities, and T1059, which encompasses execution of malicious code through system processes.
Mitigation strategies for CVE-2004-0454 should prioritize immediate patching of the rlprd daemon to version 2.05 or later, which contains the necessary buffer overflow protections and input validation fixes. System administrators should also implement principle of least privilege configurations, ensuring that the rlprd daemon runs with minimal required permissions rather than elevated privileges. Network segmentation and access controls should be strengthened to limit local access points to systems running rlpr daemons, reducing the attack surface for potential exploitation. Additionally, monitoring systems should be configured to detect anomalous behavior patterns that might indicate exploitation attempts, such as unexpected process execution or memory access violations. Organizations should also consider implementing intrusion detection systems that can identify potential buffer overflow exploitation attempts through signature-based detection methods, particularly focusing on the specific patterns associated with rlpr daemon message processing functions. Regular security audits and vulnerability assessments should be conducted to identify similar buffer overflow vulnerabilities in other system components, as this class of vulnerability remains prevalent in legacy software implementations.