CVE-2017-1000043 in Mapbox.js
Summary
by MITRE
Mapbox.js versions 1.x prior to 1.6.6 and 2.x prior to 2.2.4 are vulnerable to a cross-site-scripting attack in certain uncommon usage scenarios via TileJSON name and map share control
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Analysis
by VulDB Data Team • 10/26/2019
The vulnerability identified as CVE-2017-1000043 affects Mapbox.js library versions 1.x before 1.6.6 and 2.x before 2.2.4, presenting a cross-site-scripting risk that emerges in specific usage patterns involving TileJSON name and map share control functionalities. This security flaw resides within the client-side JavaScript library used for rendering map interfaces and interactive mapping experiences on web platforms. The vulnerability manifests when applications utilizing Mapbox.js process user-provided TileJSON data or map sharing controls without adequate input sanitization, creating an avenue for malicious actors to inject arbitrary JavaScript code into the browser context of legitimate users. The affected scenarios typically occur when developers integrate external TileJSON sources or enable map sharing features without proper validation of the data integrity.
The technical implementation of this vulnerability stems from insufficient sanitization of user-controlled input parameters within the TileJSON processing pipeline and map sharing controls. When the Mapbox.js library receives TileJSON data containing malicious script tags or executable code within the name field or related metadata, it fails to properly escape or validate these inputs before rendering them in the browser environment. This weakness allows attackers to craft malicious TileJSON objects that, when processed by the vulnerable library, execute unintended JavaScript code in the context of the victim's browser session. The vulnerability operates under CWE-79 which specifically addresses cross-site scripting flaws, where the application fails to properly validate or sanitize user-supplied data before incorporating it into dynamically generated web content.
The operational impact of this vulnerability extends beyond simple script execution, potentially enabling attackers to perform session hijacking, data theft, or further exploitation of the victim's browser environment. An attacker could craft malicious TileJSON data that, when loaded by a victim's browser, could steal authentication cookies, redirect users to phishing sites, or execute additional malicious payloads. The risk is particularly concerning in web applications where users might be encouraged to share maps or load external TileJSON resources, as these scenarios provide the necessary conditions for exploitation. The vulnerability affects not just individual users but entire organizations that depend on Mapbox.js for their mapping infrastructure, potentially compromising the security of sensitive mapping data and user privacy.
Mitigation strategies for CVE-2017-1000043 involve immediate upgrading of Mapbox.js to versions 1.6.6 or 2.2.4 respectively, which contain the necessary patches to address the input sanitization deficiencies. Organizations should also implement strict input validation policies for any TileJSON data sources, particularly those originating from external or untrusted sources. The remediation process should include comprehensive code reviews to identify any custom implementations that might bypass the library's built-in protections. Additionally, developers should consider implementing content security policies to limit the execution of inline scripts and restrict the sources from which TileJSON data can be loaded. From an ATT&CK framework perspective, this vulnerability aligns with technique T1059.007 for scripting languages and T1566 for credential access through social engineering, as the attack vector relies on manipulating user trust in map sharing features to deliver malicious payloads.