mixin-deep
Corregido en
1.3.1
CVE-2018-3719 describes a prototype pollution vulnerability affecting the mixin-deep JavaScript library. Prototype pollution occurs when an attacker can modify the prototype of built-in JavaScript objects, potentially leading to unexpected behavior and security compromises. This vulnerability impacts versions of mixin-deep released before 1.3.1, and a fix is available in version 1.3.1.
Successful exploitation of CVE-2018-3719 allows an attacker to inject malicious properties into JavaScript object prototypes. This can lead to a variety of consequences, including denial of service by corrupting application state, or even arbitrary code execution if the polluted prototype is used in sensitive operations. The impact is particularly severe in applications that heavily rely on JavaScript object manipulation or that use mixin-deep to merge configurations or data structures. Prototype pollution vulnerabilities have historically been exploited to bypass security checks and gain unauthorized access to resources. While direct remote code execution might be difficult, the ability to modify application behavior and potentially influence data processing poses a significant risk.
CVE-2018-3719 was published on July 26, 2018. While no widespread active exploitation campaigns have been publicly reported, prototype pollution vulnerabilities are increasingly recognized as a potential attack vector. The vulnerability is not listed on KEV or EPSS, indicating a low to medium probability of exploitation. Public proof-of-concept (POC) code demonstrating prototype pollution exploitation techniques is available, increasing the risk of opportunistic attacks.
Estado del Exploit
EPSS
0.54% (68% percentil)
Vector CVSS
The primary mitigation for CVE-2018-3719 is to upgrade to version 1.3.1 or later of mixin-deep. If upgrading is not immediately feasible due to compatibility issues or breaking changes, consider implementing runtime checks to prevent prototype pollution. This could involve validating the structure of merged objects or using libraries that provide protection against prototype pollution. WAF rules could be implemented to detect and block requests containing suspicious prototype pollution payloads, although this is a less reliable approach. Carefully review any code that uses mixin-deep to merge objects and ensure that the merged data is properly validated before being used.
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CVE-2018-3719 is a HIGH severity vulnerability in the mixin-deep library that allows attackers to modify object prototypes, potentially leading to denial of service or code execution.
You are affected if you are using a version of mixin-deep prior to 1.3.1. Check your project dependencies to determine if you are using a vulnerable version.
Upgrade to version 1.3.1 or later of mixin-deep. This resolves the prototype pollution vulnerability.
While no widespread active exploitation campaigns have been publicly reported, the vulnerability is known and POC code exists, increasing the risk of opportunistic attacks.
Refer to the mixin-deep project's repository or website for official advisories and release notes related to CVE-2018-3719.
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