CVE-2025-58381: Brocade Fabric OS Path Traversal Flaw

CVE-2025-58381 Overview

A path traversal vulnerability exists in Brocade Fabric OS before version 9.2.1c2 that could allow an authenticated attacker with administrative privileges to manipulate path variables and traverse directories. By exploiting specific shell commands including source, ping6, sleep, disown, and wait, an attacker can modify path variables to move upward in the directory structure or access different directories on the system.

Critical Impact

Authenticated administrators can exploit shell command handling to traverse directories and potentially access sensitive system files or configurations outside their intended scope.

Affected Products

• Brocade Fabric OS versions prior to 9.2.1c2

Discovery Timeline

• 2026-02-03 - CVE CVE-2025-58381 published to NVD
• 2026-02-03 - Last updated in NVD database

Technical Details for CVE-2025-58381

Vulnerability Analysis

This vulnerability is classified as CWE-35 (Path Traversal: '.../...//'). The flaw resides in how Brocade Fabric OS handles certain shell commands when executed by authenticated administrators. The affected commands (source, ping6, sleep, disown, and wait) fail to properly sanitize or validate path inputs, allowing manipulation of path variables.

When an attacker with admin privileges executes these commands with specially crafted input, they can modify the execution path context to traverse upward through the directory hierarchy using sequences like ../ or access arbitrary directories on the file system. This represents a failure in input validation and path canonicalization within the shell command processing logic.

The local attack vector means that exploitation requires the attacker to have existing authenticated access to the Fabric OS command-line interface with administrative privileges. While this limits the attack surface, organizations should be aware that compromised admin accounts or insider threats could leverage this vulnerability.

Root Cause

The root cause lies in insufficient path validation within the shell command handling routines of Brocade Fabric OS. The affected commands (source, ping6, sleep, disown, wait) do not adequately sanitize user-supplied path arguments, failing to prevent directory traversal sequences from being processed. This allows authenticated administrators to escape their intended directory context and access files or directories outside the expected scope.

Attack Vector

The attack requires local access with authenticated administrative privileges. An attacker must first gain admin-level shell access to a Brocade Fabric OS device. Once authenticated, the attacker can leverage the vulnerable shell commands to manipulate path variables. By providing specially crafted arguments containing directory traversal sequences, the attacker can navigate to parent directories or traverse to arbitrary locations in the file system.

The vulnerability mechanism involves exploiting the path variable handling when these commands process their arguments. For technical implementation details, refer to the Broadcom Security Advisory #36853.

Detection Methods for CVE-2025-58381

Indicators of Compromise

• Unusual shell command execution patterns involving source, ping6, sleep, disown, or wait with path traversal sequences like ../ or /../../
• Administrative sessions accessing directories outside normal operational paths
• Unexpected file system access attempts or read operations in system directories
• Audit logs showing path manipulation attempts from administrative accounts

Detection Strategies

• Monitor shell command execution logs for suspicious patterns involving the affected commands with unusual path arguments
• Implement file integrity monitoring (FIM) on critical system directories to detect unauthorized access
• Review admin session logs for anomalous directory traversal activity
• Configure SentinelOne agents to detect and alert on path traversal patterns in command execution

Monitoring Recommendations

• Enable comprehensive audit logging for all administrative shell sessions on Brocade Fabric OS devices
• Deploy network monitoring to track management plane access to Fabric OS systems
• Establish baselines for normal administrative activity to identify deviations
• Integrate Fabric OS system logs with your SIEM for centralized correlation and alerting

How to Mitigate CVE-2025-58381

Immediate Actions Required

• Upgrade Brocade Fabric OS to version 9.2.1c2 or later immediately
• Audit administrative accounts and remove unnecessary admin privileges
• Review and restrict shell access to only essential personnel
• Enable enhanced logging and monitoring on all Fabric OS devices pending upgrade

Patch Information

Broadcom has released a security patch in Brocade Fabric OS version 9.2.1c2 that addresses this path traversal vulnerability. Organizations should prioritize upgrading all affected Fabric OS installations. For detailed patch information and download instructions, refer to the Broadcom Security Advisory #36853.

Workarounds

• Implement strict access controls limiting shell access to only required administrative personnel
• Deploy additional monitoring and alerting for the affected shell commands (source, ping6, sleep, disown, wait)
• Consider network segmentation to isolate Fabric OS management interfaces from general network traffic
• Regularly audit administrative account usage and review session logs for suspicious activity