CVE-2006-2233 in Btcxctl20com Activex Control
Summary
by MITRE
Buffer overflow in BankTown Client Control (aka BtCxCtl20Com) 1.4.2.51817, and possibly 1.5.2.50209, allows remote attackers to execute arbitrary code via a long string in the first argument to SetBannerUrl. NOTE: portions of these details are obtained from third party information.
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Analysis
by VulDB Data Team • 06/21/2019
The vulnerability identified as CVE-2006-2233 represents a critical buffer overflow flaw in the BankTown Client Control component, specifically affecting version 1.4.2.51817 and potentially version 1.5.2.50209. This component is part of a broader suite of security tools designed to protect financial institutions and their clients from various cyber threats. The flaw manifests within the SetBannerUrl function where the application fails to properly validate the length of input data, creating an exploitable condition that can be leveraged by remote attackers. The vulnerability's severity is amplified by its remote exploitability, meaning attackers do not require physical access to the target system to carry out successful attacks.
The technical implementation of this buffer overflow occurs when the first argument to the SetBannerUrl function receives a string that exceeds the allocated buffer size. This condition allows attackers to overwrite adjacent memory locations, potentially corrupting program execution flow and enabling arbitrary code execution. The vulnerability directly maps to CWE-121, which describes heap-based buffer overflow conditions where insufficient bounds checking permits memory corruption. The attack vector is particularly dangerous as it operates over network connections, allowing remote exploitation without requiring user interaction or privileged access to the target system. This characteristic aligns with ATT&CK technique T1203, which involves gaining access to systems through exploitation of remote services.
The operational impact of this vulnerability extends beyond simple code execution, as successful exploitation could result in complete system compromise and unauthorized access to sensitive financial data. Financial institutions relying on the BankTown Client Control for security operations would face significant risk exposure, potentially allowing attackers to bypass security controls and gain unauthorized access to banking systems. The vulnerability's presence in multiple versions suggests a widespread impact across affected deployments, making it a particularly concerning security issue for organizations maintaining legacy systems. The fact that portions of the vulnerability details were obtained from third-party sources indicates that this flaw was likely discovered through external security research rather than internal testing, highlighting the importance of external vulnerability assessments.
Organizations affected by this vulnerability should implement immediate mitigations including patching the affected software components, disabling the vulnerable functionality if possible, and implementing network segmentation to limit exposure. The recommended approach involves updating to patched versions of the BankTown Client Control software, while also monitoring network traffic for signs of exploitation attempts. Security teams should also consider implementing intrusion detection systems that can identify patterns associated with buffer overflow exploitation attempts, particularly focusing on anomalous string lengths being passed to the SetBannerUrl function. Additionally, organizations should conduct comprehensive vulnerability assessments to identify other potentially affected systems and ensure that similar buffer overflow conditions do not exist in related software components. The vulnerability serves as a reminder of the critical importance of input validation and proper bounds checking in security-sensitive applications, particularly those handling financial data and operating in regulated environments where security compliance is mandatory.