Description Preview
A critical Remote Code Execution (RCE) vulnerability exists in Subrion CMS version 4.2.1. The vulnerability allows attackers to inject malicious code into a background field which is then executed through the eval() function when the information is modified. This can lead to complete system compromise, allowing attackers to execute arbitrary code on the affected server with the permissions of the web server user.
Overview
This vulnerability (CVE-2021-43464) affects Subrion CMS version 4.2.1. The issue stems from improper validation of user input in a background field, which is later processed using the PHP eval() function. When a user modifies information in this field, the system executes the content through eval(), allowing attackers to inject and execute arbitrary PHP code on the server. This is a critical security issue as it can lead to complete system compromise, data theft, website defacement, or be used as an entry point for further attacks on the hosting infrastructure.
Remediation
- Update Subrion CMS to the latest version that contains a fix for this vulnerability.
- If immediate updating is not possible, implement input validation and sanitization for all user inputs, especially in background fields.
- Consider implementing a Web Application Firewall (WAF) to help filter malicious requests.
- Regularly audit your code for unsafe functions like eval() and replace them with safer alternatives.
- Follow the principle of least privilege for the web server user account to minimize potential damage if exploitation occurs.
- Monitor system logs for suspicious activities that might indicate exploitation attempts.
References
- GitHub Issue: https://github.com/intelliants/subrion/issues/888
- Subrion CMS Official Website: https://subrion.org/
- OWASP - Injection Prevention: https://owasp.org/www-community/Injection_Flaws
- CWE-95: Improper Neutralization of Directives in Dynamically Evaluated Code ('Eval Injection')
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
