CVE-2012-0162 in .NET Framework
Summary
by MITRE
Microsoft .NET Framework 4 does not properly allocate buffers, which allows remote attackers to execute arbitrary code via (1) a crafted XAML browser application (aka XBAP) or (2) a crafted .NET Framework application, aka ".NET Framework Buffer Allocation Vulnerability."
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Analysis
by VulDB Data Team • 03/24/2021
The CVE-2012-0162 vulnerability represents a critical buffer allocation flaw within Microsoft .NET Framework 4 that enables remote code execution through specifically crafted applications. This vulnerability stems from improper buffer management during the execution of XAML browser applications and .NET Framework applications, creating a pathway for attackers to manipulate memory allocation processes and ultimately execute arbitrary code on affected systems. The flaw specifically targets the framework's handling of memory buffers, which are essential components for managing data during application execution and communication with system resources.
The technical implementation of this vulnerability exploits the manner in which .NET Framework 4 allocates and manages memory buffers when processing XAML content or executing managed code applications. Attackers can craft malicious XBAP files or .NET applications that trigger improper buffer handling, leading to memory corruption that can be leveraged for code execution. This type of vulnerability falls under the CWE-129 category of Improper Validation of Array Index, which directly relates to buffer overflow conditions that occur when array indices are not properly validated before accessing memory locations. The vulnerability demonstrates a classic buffer allocation issue where insufficient bounds checking allows attackers to manipulate memory layout and execute malicious payloads.
From an operational perspective, this vulnerability poses significant risks to organizations running .NET Framework 4 applications, particularly those that execute untrusted code or browse web content that might contain malicious XBAP applications. The attack vectors include both network-based exploitation through malicious web content and potentially local exploitation through crafted applications that users might inadvertently execute. Systems are particularly vulnerable when they process XAML content from untrusted sources or when users interact with applications that utilize the affected .NET Framework components. The remote execution capability means that attackers can compromise systems without requiring physical access or local privileges, making this vulnerability especially dangerous in enterprise environments where .NET applications are commonly deployed.
The mitigation strategies for CVE-2012-0162 primarily involve applying Microsoft security updates and patches that address the buffer allocation flaws in the .NET Framework 4 implementation. Organizations should prioritize patching affected systems and implementing application whitelisting policies to prevent execution of untrusted XBAP applications. Network segmentation and monitoring for suspicious XAML content can help detect potential exploitation attempts. Additionally, implementing the principle of least privilege and restricting user permissions can limit the impact of successful exploitation. The vulnerability aligns with ATT&CK technique T1059.001 for command and script interpreter, as attackers can leverage the executed code to establish persistence and further compromise affected systems. Regular security assessments and vulnerability scanning should be conducted to identify systems running vulnerable .NET Framework versions and ensure timely patch deployment across all organizational assets.