Webpack 5 before 5.76.0 does not avoid cross-realm object access. ImportParserPlugin.js mishandles the magic comment feature. An attacker who controls a property of an untrusted object can obtain access to the real global object. This vulnerability has been classified as critical due to its potential to allow unauthorized data access and manipulation.
The CVSS score for this vulnerability is 9.8, indicating a critical severity level. The high score reflects a network attack vector with low complexity, requiring no privileges or user interaction. The impacts on confidentiality, integrity, and availability are all rated as high, emphasizing the urgent need for organizations to address this vulnerability.
Given its nature and severity, organizations using affected versions of Webpack should prioritize immediate patching to mitigate potential exploitation risks. Failure to do so could result in significant security breaches.
This vulnerability has not been observed in known exploitation scenarios, but the potential for abuse is significant. Therefore, vigilance and timely remediation are critical.
Vulnerability Details
The vulnerability allows an attacker to exploit cross-realm object access due to a flaw in the ImportParserPlugin.js component of Webpack 5 prior to version 5.76.0. This flaw enables an attacker to manipulate properties of untrusted objects, leading to unauthorized access to the global object.
The CVSS score of 9.8 indicates a critical severity, with high potential impacts on confidentiality, integrity, and availability. Organizations must be aware that all versions of Webpack prior to the patch must be considered vulnerable.
Technical Analysis
The root cause of this vulnerability lies in the mishandling of magic comments in the ImportParserPlugin.js. Attackers can exploit this by manipulating untrusted objects to access sensitive properties, compromising the overall security of the application.
The attack vector is network-based, requiring low complexity for exploitation. No privileges or user interaction are necessary, making this vulnerability especially dangerous.
The impacts on confidentiality, integrity, and availability are rated as high, indicating that successful exploitation could lead to significant data leaks, unauthorized modifications, or disruptions in service.
Risk & Impact Analysis
The deployment of vulnerable versions of Webpack poses substantial risk to organizations. The potential for unauthorized access and manipulation of global objects could lead to significant data breaches and operational disruptions.
Organizations should assess their exposure to this vulnerability and prioritize remediation based on the critical nature of the flaw and its associated impacts. The urgency of addressing this flaw cannot be overstated, especially given the critical CVSS score.
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
All versions of Webpack prior to 5.76.0 are affected. Organizations are advised to upgrade to the latest version to mitigate the associated risks.
Mitigation & Remediation
Organizations should prioritize upgrading their Webpack installations to version 5.76.0 or later. For those unable to upgrade immediately, consider implementing configuration hardening and network controls to limit exposure.
Additionally, organizations can benefit from conducting regular security assessments. For effective validation of fixes, organizations should utilize penetration testing to ensure that no similar vulnerabilities exist.
Detection Guidance
Organizations should monitor logs for unusual activity that may indicate exploitation attempts. Behavioral anomalies in application performance may also signal potential exploitation of this vulnerability.
Network signatures that correlate with known attack patterns can aid in early detection. It's essential to periodically review system configurations for any unauthorized changes.
AppSecure Threat Intelligence Insight
The long-term significance of this vulnerability highlights the ongoing challenges organizations face in securing their JavaScript environments. The cross-realm object access issue represents a broader trend of vulnerabilities in complex web applications.
Security teams must stay vigilant against such vulnerabilities and continuously adapt their security posture. For more insights on securing applications, organizations can refer to vulnerability management programs and best practices.
Additionally, organizations should consider leveraging penetration testing methodologies to proactively identify and mitigate vulnerabilities.
Finally, understanding the implications of vulnerabilities such as CVE-2023-28154 can guide strategic defensive measures and improve overall application security.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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