Overview
In the ever-expanding landscape of cybersecurity, new vulnerabilities continue to emerge, posing significant threats to organizations and their infrastructures. One such vulnerability, CVE-2025-21120, affects Dell Avamar, a popular data protection software solution. With potential risks including system compromise and data leakage, it’s crucial for IT security teams to understand and mitigate this vulnerability.
This specific vulnerability affects Dell Avamar versions prior to 19.12 with patch 338905, excluding version 19.10SP1 with patch 338904. It involves a trusting HTTP permission method on the server-side, which could be exploited by a low privileged attacker with remote access. The potential risks are significant, making it a significant concern for IT security teams.
Vulnerability Summary
CVE ID: CVE-2025-21120
Severity: High (8.3 CVSS Score)
Attack Vector: Network
Privileges Required: Low
User Interaction: None
Impact: Potential system compromise and data leakage
Affected Products
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Product | Affected Versions
Dell Avamar | Versions prior to 19.12 with patch 338905, excluding version 19.10SP1 with patch 338904
How the Exploit Works
The vulnerability lies in the server-side HTTP permission method that Avamar trusts. An attacker with low-level privileges and remote access can exploit this vulnerability by sending crafted HTTP requests to the server. Since the server trusts these permission methods, it does not adequately verify the requests, leading to potential information exposure.
Conceptual Example Code
The vulnerability might be exploited using a simple HTTP request like the following:
POST /avamar-endpoint HTTP/1.1
Host: target.example.com
Content-Type: application/json
{ "malicious_payload": "Exploit_Code_Here" }In this example, the malicious payload would be carefully crafted to exploit the vulnerability, making the server execute actions that would lead to information exposure or potentially even full system compromise.
Recommendations for Mitigation
To mitigate this vulnerability, users are advised to apply the vendor patch (338905 for versions prior to 19.12, and 338904 for version 19.10SP1). In the absence of the patch, using a Web Application Firewall (WAF) or an Intrusion Detection System (IDS) could provide temporary mitigation by monitoring and blocking suspicious activities. However, it’s essential to apply the vendor patch as soon as possible to effectively eliminate the vulnerability.