CVE-2018-10496 in Internet Browser
Summary
by MITRE
This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Samsung Internet Browser Fixed in version 6.4.0.15. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The specific flaw exists within the handling of TypedArray objects. The issue results from the lack of validating the existence of an object prior to performing operations on the object. An attacker can leverage this vulnerability to execute code under the context of the current process. Was ZDI-CAN-5326.
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Analysis
by VulDB Data Team • 03/26/2020
This vulnerability in Samsung Internet Browser represents a critical heap-based buffer overflow condition that arises from inadequate input validation within the TypedArray object handling mechanism. The flaw exists in the browser's JavaScript engine where the application fails to properly validate object existence before performing operations on TypedArray objects, creating a dangerous condition that can be exploited remotely. The vulnerability specifically manifests when the browser processes maliciously crafted web content that triggers improper memory management during TypedArray operations, allowing attackers to manipulate memory layout and potentially execute arbitrary code.
The technical implementation of this vulnerability aligns with CWE-125, which describes out-of-bounds read conditions, and CWE-787, which covers out-of-bounds write operations. Attackers can exploit this weakness by crafting malicious web pages that contain specially constructed TypedArray objects designed to trigger the buffer overflow during normal browser operation. The vulnerability requires user interaction, meaning victims must visit a malicious website or open a malicious file for exploitation to occur, making it a client-side attack vector that leverages social engineering tactics. This approach follows the ATT&CK framework's technique T1203, which involves exploiting weaknesses in software applications through targeted attacks that require user engagement.
The operational impact of this vulnerability extends beyond simple code execution, as successful exploitation allows attackers to operate within the browser's security context with elevated privileges. This creates a potential escalation path for attackers who might leverage the vulnerability to gain access to user data, cookies, or even sensitive information stored within the browser environment. The vulnerability affects Samsung Internet Browser versions prior to 6.4.0.15, making it particularly concerning for users who have not updated their software. The exploitation process typically involves constructing a payload that triggers the specific memory corruption scenario, followed by code execution that can be used to establish persistent access or exfiltrate data from the compromised system.
Organizations and users should prioritize immediate remediation by updating to Samsung Internet Browser version 6.4.0.15 or later, which contains the necessary patches to address the TypedArray validation issue. Additional mitigations include implementing web application firewalls to filter suspicious content, enabling browser security features such as sandboxing, and educating users about the risks of visiting untrusted websites. Security monitoring should focus on detecting unusual browser behavior, unexpected code execution patterns, and attempts to access system resources from browser processes. The vulnerability demonstrates the importance of proper input validation and memory management in browser implementations, as highlighted by the Common Weakness Enumeration standards and the MITRE ATT&CK framework's categorization of such exploits as application-level attacks requiring user interaction for successful compromise.