Description Preview
Leanote 2.7.0 desktop application contains a Cross-Site Scripting (XSS) vulnerability in the markdown note feature. An attacker can embed malicious HTML and JavaScript code within a markdown note that gets executed when viewed. This vulnerability can be exploited to achieve remote code execution by leveraging Node.js integration in the Electron-based application, allowing attackers to execute arbitrary system commands.
Overview
The vulnerability exists in Leanote 2.7.0's markdown processing functionality. When a user views a markdown note containing specially crafted HTML tags with JavaScript event handlers, the application renders and executes the embedded code with the privileges of the application. Since Leanote is built on Electron, which has access to Node.js APIs, this XSS vulnerability can be escalated to execute arbitrary system commands. For example, an attacker can use the payload "<video src=x onerror=(function(){require('child_process').exec('calc');})();>" to launch the calculator application on Windows systems, demonstrating the ability to execute system commands.
Remediation
Users should:
- Update to a newer version of Leanote if a patched version is available
- If no update is available, exercise caution when opening markdown notes from untrusted sources
- Consider implementing Content Security Policy (CSP) if customizing the application
- Disable Node.js integration in the webview contexts if possible
Developers should:
- Implement proper input sanitization for markdown content
- Use a secure markdown parser that doesn't allow raw HTML execution
- Disable Node.js integration in renderer processes or use contextIsolation in Electron
- Implement a Content Security Policy that restricts script execution
References
- GitHub Issue: https://github.com/leanote/desktop-app/issues/364
- CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
- Electron Security Documentation: https://www.electronjs.org/docs/latest/tutorial/security
Industry ExposureMost to leastThis section illustrates the prevalence of a specific Common Vulnerabilities and Exposures (CVE) across various industries based on customer reports. The ranking displays industries from the most to least affected by this particular vulnerability, offering valuable insight into where this CVE has been most frequently observed. This information can help organizations within these sectors prioritize their security efforts, understand their relative risk exposure compared to their peers, and focus remediation strategies where they are most needed. By understanding the industry-specific impact, organizations can make more informed decisions regarding patching, resource allocation, and overall risk management related to this CVE.
This section illustrates the prevalence of a specific Common Vulnerabilities and Exposures (CVE) across various industries based on customer reports. The ranking displays industries from the most to least affected by this particular vulnerability, offering valuable insight into where this CVE has been most frequently observed. This information can help organizations within these sectors prioritize their security efforts, understand their relative risk exposure compared to their peers, and focus remediation strategies where they are most needed. By understanding the industry-specific impact, organizations can make more informed decisions regarding patching, resource allocation, and overall risk management related to this CVE.
- Accommodation & Food ServicesAccommodation & Food Services
- Administrative, Support, Waste Management & Remediation ServicesAdministrative, Support, Waste Management & Remediation Services
- Agriculture, Forestry Fishing & HuntingAgriculture, Forestry Fishing & Hunting
- Arts, Entertainment & RecreationArts, Entertainment & Recreation
- ConstructionConstruction
- Educational ServicesEducational Services
- Finance and InsuranceFinance and Insurance
- Health Care & Social AssistanceHealth Care & Social Assistance
- InformationInformation
- Management of Companies & EnterprisesManagement of Companies & Enterprises
- ManufacturingManufacturing
- MiningMining
- Other Services (except Public Administration)Other Services (except Public Administration)
- Professional, Scientific, & Technical ServicesProfessional, Scientific, & Technical Services
- Public AdministrationPublic Administration
- Real Estate Rental & LeasingReal Estate Rental & Leasing
- Retail TradeRetail Trade
- Transportation & WarehousingTransportation & Warehousing
- UtilitiesUtilities
- Wholesale TradeWholesale Trade
