CVE-2019-8997 in AtHoc
Summary
by MITRE
An XML External Entity Injection (XXE) vulnerability in the Management System (console) of BlackBerry AtHoc versions earlier than 7.6 HF-567 could allow an attacker to potentially read arbitrary local files from the application server or make requests on the network by entering maliciously crafted XML in an existing field.
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Analysis
by VulDB Data Team • 08/04/2023
The vulnerability identified as CVE-2019-8997 represents a critical XML External Entity Injection flaw within the Management System console of BlackBerry AtHoc software. This weakness affects versions prior to 7.6 HF-567 and stems from insufficient input validation when processing XML data within the application's console interface. The vulnerability manifests when the system fails to properly sanitize XML inputs, allowing malicious actors to inject external entity references that can be exploited to gain unauthorized access to sensitive system resources.
The technical implementation of this XXE vulnerability occurs through the improper handling of XML parsing within the console management interface. When the application processes XML data containing external entity declarations, it fails to restrict access to local system resources or network endpoints. This flaw allows attackers to construct malicious XML payloads that can reference local files on the server filesystem or initiate outbound network requests to arbitrary destinations. The vulnerability specifically targets the console component where administrators interact with the system, making it particularly dangerous as it could be exploited by authenticated users with appropriate privileges.
From an operational impact perspective, this vulnerability creates significant security risks for organizations relying on BlackBerry AtHoc for their communication and incident management processes. An attacker exploiting this XXE vulnerability could potentially read sensitive configuration files, database credentials, or other locally stored information from the application server. Additionally, the ability to make network requests from the server opens pathways for further reconnaissance and lateral movement within the network infrastructure. The attack surface is particularly concerning given that the vulnerability exists in the management console, which typically requires elevated privileges and contains sensitive operational data.
The security implications extend beyond simple data exfiltration, as this vulnerability aligns with CWE-611 (Improper Restriction of XML External Entity Reference) and can be mapped to ATT&CK techniques including T1071.004 (Application Layer Protocol: DNS) and T1566.001 (Phishing: Spearphishing Attachment) when considering how attackers might initially gain access to the management console. Organizations using affected versions should prioritize immediate remediation through the available patch updates, as the vulnerability can be exploited by both internal and external threat actors. The recommended mitigation strategy involves applying the vendor-provided security update to version 7.6 HF-567 or later, along with implementing additional input validation measures and network segmentation to limit potential impact if exploitation occurs.
The broader implications of this vulnerability highlight the importance of proper XML processing security measures in enterprise applications. Organizations should review their XML parsing implementations across all systems and ensure that external entity resolution is properly disabled or restricted. This vulnerability demonstrates how seemingly simple input validation flaws can create substantial security risks in management interfaces, emphasizing the need for comprehensive security testing including XML injection vulnerability assessments. The remediation process should also include monitoring for potential exploitation attempts and implementing network-based intrusion detection systems to identify suspicious outbound network requests that might indicate successful exploitation of this XXE vulnerability.