CVE-2012-2425 in QuickBooks
Summary
by MITRE
The intu-help-qb (aka Intuit Help System Async Pluggable Protocol) handlers in HelpAsyncPluggableProtocol.dll in Intuit QuickBooks 2009 through 2012, when Internet Explorer is used, allow remote attackers to cause a denial of service (application crash) via a long URI.
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Analysis
by VulDB Data Team • 12/23/2024
The vulnerability identified as CVE-2012-2425 represents a classic buffer overflow condition within the Intuit Help System Async Pluggable Protocol handlers. This flaw exists in the HelpAsyncPluggableProtocol.dll component that is part of Intuit QuickBooks versions ranging from 2009 through 2012. The vulnerability manifests specifically when Internet Explorer is utilized as the web browser, creating a dangerous intersection between the browser's handling of protocol handlers and the insecure memory management within QuickBooks' help system. The flaw operates through a simple yet effective mechanism where remote attackers can craft malicious URIs of excessive length to trigger application instability. This represents a type of denial of service vulnerability that can be exploited without requiring authentication or special privileges, making it particularly concerning for enterprise environments where QuickBooks is widely deployed.
The technical exploitation of this vulnerability stems from inadequate input validation within the protocol handler implementation. When a malformed URI exceeding predetermined buffer limits is processed by the HelpAsyncPluggableProtocol.dll component, the system fails to properly handle the excessive data length, leading to memory corruption and subsequent application crash. This behavior aligns with CWE-121, which describes unsafe use of a stack-based buffer, and CWE-122, which covers unsafe use of a heap-based buffer. The vulnerability demonstrates a clear failure in bounds checking and memory management practices, where the protocol handler does not adequately validate the length of incoming URI data before attempting to process it. The specific implementation flaw suggests that the developers did not account for potential malicious input scenarios, particularly those involving excessively long URI parameters that could overwhelm the allocated memory space within the protocol handler's processing functions.
The operational impact of this vulnerability extends beyond simple application instability to potentially disrupt business operations within organizations that rely heavily on QuickBooks for financial management. When exploited, the vulnerability can cause QuickBooks applications to crash repeatedly, leading to data loss, productivity interruptions, and potential financial reporting delays. The remote nature of the attack means that adversaries can trigger these crashes from any location without requiring physical access to the target systems, making the vulnerability particularly dangerous in networked environments. Organizations may experience cascading effects where multiple users within a network simultaneously experience application failures, potentially leading to widespread operational disruption. The vulnerability also represents a potential vector for more sophisticated attacks, as the crash conditions could be leveraged to create conditions favorable for additional exploitation attempts, particularly in environments where QuickBooks is used alongside other financial applications that may share similar architectural components.
Organizations should implement immediate mitigations to address this vulnerability including updating to patched versions of QuickBooks where available, implementing network-level restrictions on protocol handler usage, and configuring Internet Explorer to limit the execution of potentially malicious URI handlers. System administrators should also consider implementing monitoring solutions to detect unusual patterns of application crashes that might indicate exploitation attempts. The vulnerability highlights the importance of proper input validation and bounds checking in protocol handler implementations, aligning with ATT&CK technique T1203 which covers Exploitation for Client Execution. Organizations should also consider deploying application whitelisting solutions that can prevent unauthorized execution of potentially vulnerable components, and implement regular security assessments to identify similar vulnerabilities in other enterprise applications that may share similar architectural patterns with QuickBooks' help system implementation.