CVE-1999-0337 in AIX
Summary
by MITRE
aix batch queue (bsh) allows local and remote users to gain additional privileges when network printing is enabled.
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Analysis
by VulDB Data Team • 04/03/2025
The vulnerability identified as CVE-1999-0337 affects the AIX batch queue system known as bsh which is part of IBM's AIX operating system. This flaw specifically targets the network printing functionality within the batch queue subsystem, creating a privilege escalation vector that can be exploited by both local and remote attackers. The vulnerability stems from improper privilege handling within the batch queue processing mechanism when network printing capabilities are active, allowing unauthorized users to elevate their system privileges beyond normal access controls.
The technical root cause of this vulnerability lies in the insufficient validation and privilege management within the bsh batch processing system. When network printing is enabled, the system fails to properly enforce privilege boundaries during batch job execution, particularly when processing print jobs that involve networked printer configurations. This weakness enables attackers to manipulate batch queue operations in ways that bypass normal authentication and authorization checks. The flaw operates at the system level where batch jobs are processed, allowing malicious actors to inject commands or modify job parameters that result in elevated privilege execution. According to CWE classification, this represents a privilege escalation vulnerability categorized under CWE-269, which deals with insufficient privileges or incorrect privileges assigned to system components.
The operational impact of CVE-1999-0337 extends beyond simple privilege escalation to potentially enable full system compromise. Local attackers can leverage this vulnerability to gain root or administrative privileges on AIX systems, while remote attackers with network access can exploit the same weakness to achieve unauthorized system control. The vulnerability is particularly dangerous because it can be exploited through network printing services without requiring direct physical access or prior authentication. This makes it a significant concern for enterprise environments where network printing services are commonly enabled and managed. The risk is compounded by the fact that many organizations maintain extensive network printing infrastructures as part of their standard operations, creating widespread exposure.
Security professionals should implement multiple layers of mitigation to address this vulnerability effectively. The primary recommendation involves disabling network printing functionality within the batch queue system when it is not strictly required for operations. System administrators should also ensure that proper access controls are implemented to limit who can submit batch jobs and manage print queues. Additionally, regular security audits should verify that batch queue configurations do not inadvertently enable unnecessary network printing capabilities. According to ATT&CK framework, this vulnerability maps to privilege escalation techniques and can be categorized under T1068 which covers privilege escalation through local services. Organizations should also consider implementing network segmentation to limit access to batch processing systems and ensure that only authorized network segments can communicate with print servers. The vulnerability underscores the importance of maintaining least privilege principles and regularly reviewing system configurations to eliminate unnecessary services that could create attack vectors.