CVE-2016-8980 in BigFix Inventory
Summary
by MITRE
IBM BigFix Inventory v9 is vulnerable to a denial of service, caused by an XML External Entity Injection (XXE) error when processing XML data. A remote attacker could exploit this vulnerability to expose highly sensitive information or consume all available memory resources.
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Analysis
by VulDB Data Team • 08/09/2020
The vulnerability identified as CVE-2016-8980 affects IBM BigFix Inventory version 9, presenting a critical security risk through XML External Entity Injection (XXE) flaws. This vulnerability resides within the XML processing mechanisms of the inventory system, where the application fails to properly validate and sanitize XML input data. The flaw allows malicious actors to manipulate XML parsing behavior by introducing external entities that reference internal system resources or external network endpoints. When the system processes malformed XML containing malicious entity references, it inadvertently executes these references, creating potential attack vectors for information disclosure and system disruption.
The technical implementation of this XXE vulnerability stems from insufficient input validation and improper XML parser configuration within the BigFix Inventory application. The system's XML parser accepts and processes external entity declarations without adequate restrictions, enabling attackers to craft specially formatted XML payloads that can trigger unauthorized resource access. This vulnerability specifically impacts the XML data processing pipeline where inventory information is parsed and stored, creating opportunities for attackers to either retrieve sensitive system information or construct resource exhaustion attacks. The flaw operates at the application layer and requires minimal privileges to exploit, making it particularly dangerous in enterprise environments where inventory systems often process untrusted data from multiple sources.
The operational impact of this vulnerability extends beyond simple denial of service conditions to encompass serious data exposure risks. An attacker exploiting this XXE vulnerability could potentially access internal system files, network resources, or sensitive configuration data that the inventory system processes. The memory consumption aspect of the vulnerability presents additional concerns as malicious XML payloads can be designed to cause exponential resource growth, leading to system instability and complete service unavailability. Organizations relying on BigFix Inventory for asset management and compliance tracking face significant risks, as this vulnerability could compromise the integrity of their inventory databases and potentially expose confidential information about their IT infrastructure.
Mitigation strategies for CVE-2016-8980 should focus on immediate application updates and configuration hardening measures. IBM has released patches and updates addressing this vulnerability, which organizations must implement promptly to eliminate the XXE attack surface. System administrators should configure XML parsers to disable external entity processing entirely and implement strict input validation for all XML data streams. Network segmentation and access controls can help limit the potential impact of exploitation attempts, while monitoring systems should be deployed to detect anomalous XML processing patterns. The vulnerability aligns with CWE-611 (Improper Restriction of XML External Entity Reference) and represents a common attack pattern categorized under ATT&CK technique T1213.002 (Data from Information Repositories), highlighting the need for comprehensive security measures in enterprise inventory management systems. Organizations should also consider implementing automated vulnerability scanning tools that can detect similar XXE vulnerabilities in other applications and services within their infrastructure.