CVE-2025-36597: Dell Avamar Path Traversal Vulnerability

CVE-2025-36597 Overview

CVE-2025-36597 is a Path Traversal vulnerability (CWE-22) affecting Dell Avamar, a widely deployed enterprise backup and data deduplication solution. The vulnerability exists in the Security component of Dell Avamar versions prior to 19.12 with patch 338905. A high-privileged attacker with remote network access could potentially exploit this vulnerability to traverse restricted directory paths, leading to information disclosure.

Critical Impact

A privileged attacker could exploit improper pathname restrictions to access sensitive files outside intended directories, potentially exposing confidential backup configurations, credentials, or other sensitive enterprise data.

Affected Products

• Dell Avamar versions prior to 19.12 with patch 338905
• Dell Avamar Virtual Edition (versions prior to 19.12 with patch 338905)

Discovery Timeline

• 2026-02-17 - CVE-2025-36597 published to NVD
• 2026-02-18 - Last updated in NVD database

Technical Details for CVE-2025-36597

Vulnerability Analysis

This vulnerability stems from improper limitation of a pathname to a restricted directory, commonly known as Path Traversal or Directory Traversal (CWE-22). The Security component within Dell Avamar fails to adequately sanitize user-supplied input containing directory traversal sequences such as ../ or ..\. When a high-privileged attacker with remote access provides crafted input with these sequences, the application may resolve the path to locations outside the intended restricted directory structure.

The exploitation requires network access and high-level privileges within the Dell Avamar environment. While this limits the attack surface, organizations should not underestimate the risk—a compromised administrator account or insider threat could leverage this vulnerability to access sensitive backup metadata, configuration files, or potentially credential stores that should be protected within the backup infrastructure.

Root Cause

The root cause lies in insufficient input validation within Dell Avamar's Security component. The application does not properly canonicalize or validate file paths before using them in file system operations. When processing requests that include pathname components, the vulnerable code fails to strip or neutralize directory traversal sequences (../, ..\, or URL-encoded variants). This allows an attacker to construct paths that escape the intended directory boundary and reference arbitrary files on the underlying file system, subject to the application's access permissions.

Attack Vector

The attack vector is network-based, requiring an attacker to have authenticated access with high privileges to the Dell Avamar system. The attacker would craft malicious requests containing directory traversal sequences targeting the vulnerable Security component. These requests could be delivered through the management interface or API endpoints exposed by Dell Avamar.

A typical exploitation scenario involves:

1. Authenticated attacker identifies endpoints in the Security component that accept file path parameters
2. Attacker crafts a request with traversal sequences (e.g., ../../../../etc/passwd on Linux-based deployments)
3. The vulnerable component processes the path without proper sanitization
4. The application returns contents of files outside the intended directory, leading to information disclosure

No verified proof-of-concept code is publicly available for this vulnerability. For detailed technical information, refer to the Dell Security Update DSA-2025-271.

Detection Methods for CVE-2025-36597

Indicators of Compromise

• Unusual file access patterns in Dell Avamar logs showing attempts to access files outside standard application directories
• HTTP/API requests containing directory traversal sequences (../, ..%2f, %2e%2e/) targeting Dell Avamar endpoints
• Unexpected read operations on sensitive system files such as /etc/passwd, /etc/shadow, or configuration files
• Anomalous authentication events from privileged accounts followed by atypical file access requests

Detection Strategies

• Monitor Dell Avamar access logs for requests containing path traversal patterns such as ../, ..\, or URL-encoded equivalents
• Implement file integrity monitoring on critical Dell Avamar directories to detect unauthorized access attempts
• Deploy network-based intrusion detection rules to identify path traversal attempts in HTTP requests to Dell Avamar management interfaces
• Audit privileged account activity within Dell Avamar for anomalous behavior patterns

Monitoring Recommendations

• Enable detailed logging on Dell Avamar Security component and forward logs to SIEM for centralized analysis
• Configure alerts for any access attempts to system directories or files outside the Dell Avamar application scope
• Regularly review access control lists and privileged account usage within the Dell Avamar environment
• Implement behavioral analytics to detect deviation from normal administrative activity patterns

How to Mitigate CVE-2025-36597

Immediate Actions Required

• Upgrade Dell Avamar to version 19.12 with patch 338905 or later immediately
• Audit current privileged accounts and ensure principle of least privilege is enforced
• Review Dell Avamar access logs for any signs of prior exploitation attempts
• Implement network segmentation to restrict access to Dell Avamar management interfaces to authorized administrator workstations only

Patch Information

Dell has released a security update addressing this vulnerability. Organizations running affected versions of Dell Avamar should apply the update as soon as possible. The remediation requires upgrading to Dell Avamar version 19.12 with patch 338905 or a later supported version.

For complete patch details and download instructions, refer to the official Dell Security Advisory DSA-2025-271.

Workarounds

• Restrict network access to Dell Avamar management interfaces using firewall rules or VPN requirements
• Implement strict access controls limiting high-privilege account usage to essential personnel only
• Deploy a Web Application Firewall (WAF) configured to block path traversal patterns in requests to Dell Avamar endpoints
• Enable multi-factor authentication for all privileged accounts accessing Dell Avamar

# Example: Restrict management interface access via iptables
# Allow only specific administrator subnets to access Dell Avamar management port
iptables -A INPUT -p tcp --dport 443 -s 10.10.50.0/24 -j ACCEPT
iptables -A INPUT -p tcp --dport 443 -j DROP