CVE-1999-0333 in HP-UX
Summary
by MITRE
HP OpenView Omniback allows remote execution of commands as root via spoofing, and local users can gain root access via a symlink attack.
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Analysis
by VulDB Data Team • 04/17/2026
The vulnerability identified as CVE-1999-0333 represents a critical security flaw in HP OpenView Omniback, a network management and backup solution widely deployed in enterprise environments during the late 1990s. This vulnerability manifests through two distinct attack vectors that collectively enable unauthorized privilege escalation from regular user accounts to root level access, compromising the fundamental security model of the system. The issue stems from inadequate input validation and improper privilege handling within the backup and recovery processes that HP OpenView Omniback employs for system administration tasks.
The remote command execution aspect of this vulnerability operates through a spoofing mechanism that allows attackers to manipulate the backup process and execute arbitrary commands with root privileges. This occurs when the system fails to properly authenticate or validate the source of backup operations, enabling malicious actors to inject commands that are subsequently executed with elevated privileges. The vulnerability specifically targets the way HP OpenView Omniback handles backup jobs and system interactions, creating a pathway for remote attackers to bypass normal access controls and gain direct system control. This represents a classic example of a privilege escalation vulnerability that can be exploited across network boundaries without requiring local access initially.
The local symlink attack component of this vulnerability exploits weaknesses in how the system handles symbolic links during backup operations. When local users can manipulate file system references, they can create malicious symlinks that, when processed by the backup system, redirect operations to sensitive system files or directories. This attack vector allows local users to escalate their privileges by leveraging the backup system's elevated permissions to modify critical system components or gain access to restricted resources. The vulnerability demonstrates a failure in proper file system access control enforcement during backup operations, where the system does not adequately validate the integrity of symbolic links or their target locations.
From a cybersecurity perspective, this vulnerability aligns with CWE-264, which addresses permissions, privileges, and access controls, and specifically manifests as a privilege escalation vulnerability. The ATT&CK framework categorizes this under privilege escalation techniques, where adversaries leverage weaknesses in system design to gain higher-level access rights. The impact of such vulnerabilities extends beyond simple unauthorized access, as they can enable complete system compromise and data exfiltration. Organizations using HP OpenView Omniback were particularly vulnerable since the backup system typically requires elevated privileges to perform its functions, creating a dangerous attack surface when proper access controls are not implemented.
The operational impact of CVE-1999-0333 was severe for organizations relying on HP OpenView Omniback for their backup and recovery operations. System administrators faced the risk of unauthorized access to critical backup data, potential system corruption through malicious command execution, and complete loss of system integrity. The vulnerability created a persistent threat vector that could be exploited by both external attackers seeking to compromise network infrastructure and internal users with malicious intent. Organizations typically had to implement immediate patching procedures or alternative access controls to mitigate the risk, as the vulnerability could be exploited without requiring special tools or extensive knowledge of the system's internal workings.
Mitigation strategies for this vulnerability required comprehensive system hardening measures including immediate patch deployment, proper access control implementation, and monitoring of backup operations for suspicious activities. System administrators needed to ensure that backup processes ran with minimal required privileges and that proper input validation was implemented for all backup operations. The vulnerability highlighted the importance of principle of least privilege enforcement and proper system auditing in backup environments. Organizations also needed to implement network segmentation to limit access to backup systems and establish monitoring procedures to detect unauthorized command execution attempts. This vulnerability ultimately demonstrated the critical importance of secure backup system design and the potential for backup infrastructure to become a primary attack vector when proper security controls are not implemented.