CVE-2018-11048 in Data Protection Advisor
Summary
by MITRE
Dell EMC Data Protection Advisor, versions 6.2, 6,3, 6.4, 6.5 and Dell EMC Integrated Data Protection Appliance (IDPA) versions 2.0, 2.1 contain a XML External Entity (XXE) Injection vulnerability in the REST API. An authenticated remote malicious user could potentially exploit this vulnerability to read certain system files in the server or cause denial of service by supplying specially crafted Document Type Definitions (DTDs) in an XML request.
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Analysis
by VulDB Data Team • 05/01/2023
The CVE-2018-11048 vulnerability represents a critical XML External Entity injection flaw discovered in Dell EMC Data Protection Advisor and Integrated Data Protection Appliance products. This vulnerability exists within the REST API components of these data protection systems, which are widely deployed in enterprise environments for backup and recovery operations. The affected versions include Data Protection Advisor 6.2, 6.3, 6.4, 6.5 and IDPA 2.0, 2.1, making this a significant concern for organizations relying on these platforms for their data protection infrastructure. The vulnerability stems from insufficient input validation and improper handling of XML data within the API endpoints, creating a pathway for malicious actors to manipulate the system's XML processing behavior.
The technical exploitation of this XXE vulnerability occurs when an authenticated attacker sends specially crafted XML requests containing malicious Document Type Definitions to the affected REST API endpoints. This flaw allows the system to process external entity references that can lead to unauthorized file access on the server filesystem. Attackers can leverage this capability to read sensitive system files, configuration data, or other confidential information stored on the target servers. The vulnerability also enables denial of service conditions when attackers supply crafted DTDs that can cause the system to consume excessive resources or enter infinite processing loops. This dual nature of the vulnerability makes it particularly dangerous as it can be used for both information disclosure and service disruption attacks.
From an operational impact perspective, this vulnerability poses severe risks to enterprise data protection environments where Dell EMC systems are deployed. Organizations using these platforms for critical backup and recovery operations face potential exposure of sensitive backup data, system configuration files, and potentially authentication credentials stored within the protected systems. The authenticated nature of the exploit means that attackers would need valid credentials, but this requirement is often bypassed through credential compromise, privilege escalation, or social engineering attacks. The vulnerability affects the core functionality of data protection services, potentially leaving organizations without reliable backup capabilities during critical incidents. Security teams must consider the impact on business continuity and disaster recovery planning when assessing this vulnerability's operational implications.
The vulnerability aligns with CWE-611 (Improper Restriction of XML External Entity Reference) and maps to ATT&CK technique T1078 (Valid Accounts) and T1190 (Exploit Public-Facing Application) within the MITRE ATT&CK framework. Organizations should implement immediate mitigations including applying the vendor-provided patches, disabling unnecessary XML processing capabilities, and implementing network segmentation to limit access to the affected API endpoints. Additional protective measures include monitoring for unusual XML processing patterns, implementing web application firewalls, and conducting comprehensive security assessments of the data protection infrastructure. The vulnerability highlights the importance of secure coding practices and input validation in API development, particularly for systems handling sensitive backup and recovery data. Organizations should also consider implementing privileged access management controls and regular security audits to prevent unauthorized access to critical data protection systems.