CVE-2016-1131 in DX Library
Summary
by MITRE
Buffer overflow in the CL_vsprintf function in Takumi Yamada DX Library before 3.16 allows remote attackers to execute arbitrary code via a crafted string.
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Analysis
by VulDB Data Team • 06/04/2018
The vulnerability identified as CVE-2016-1131 represents a critical buffer overflow flaw within the CL_vsprintf function of Takumi Yamada DX Library versions prior to 3.16. This library is commonly utilized in various software applications for handling formatted string operations, making it a potential entry point for malicious actors seeking to compromise systems. The buffer overflow occurs when the function processes a crafted string that exceeds the allocated buffer space, creating conditions where adjacent memory can be overwritten with malicious data.
The technical nature of this vulnerability aligns with CWE-121, which describes heap-based buffer overflow conditions where insufficient bounds checking allows attackers to write beyond allocated memory boundaries. The flaw specifically manifests in the CL_vsprintf implementation where string formatting operations do not properly validate input length against buffer capacity, enabling attackers to craft malicious input sequences that trigger memory corruption. This type of vulnerability falls under the ATT&CK technique T1059.007 for command and scripting interpreter, as successful exploitation could enable remote code execution through manipulated string processing.
The operational impact of this vulnerability extends beyond simple memory corruption, as it provides remote attackers with the capability to execute arbitrary code on affected systems. When exploited, the buffer overflow can overwrite return addresses, function pointers, or other critical program data structures, potentially allowing attackers to redirect program execution flow to malicious code. This makes the vulnerability particularly dangerous in network-facing applications where the DX Library is employed for processing user input or external data streams.
Mitigation strategies for CVE-2016-1131 primarily focus on upgrading to Takumi Yamada DX Library version 3.16 or later, which contains fixed implementations of the CL_vsprintf function with proper bounds checking. Organizations should also implement input validation measures to filter or sanitize string inputs before processing, particularly when these inputs originate from untrusted sources. Additionally, deploying stack protection mechanisms such as stack canaries and address space layout randomization can help mitigate exploitation attempts, though these are considered defensive measures rather than primary fixes for the underlying buffer overflow condition. The vulnerability demonstrates the importance of proper memory management practices and input validation in preventing remote code execution scenarios that could lead to complete system compromise.