CVE-2020-13133 in SecureChange
Summary
by MITRE • 01/20/2021
Tufin SecureChange prior to R19.3 HF3 and R20-1 HF1 are vulnerable to stored XSS. The successful exploitation requires admin privileges (for storing the XSS payload itself), and can exploit (be triggered by) unauthenticated users. All TOS versions with SecureChange deployments prior to R19.3 HF3 and R20-1 HF1 are affected. Vulnerabilities were fixed in R19.3 HF3 and R20-1 HF1
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Analysis
by VulDB Data Team • 02/15/2021
The vulnerability identified as CVE-2020-13133 affects Tufin SecureChange software versions prior to R19.3 HF3 and R20-1 HF1, representing a critical stored cross-site scripting flaw that undermines the security posture of network change management systems. This vulnerability resides within the SecureChange component of Tufin's security orchestration platform, which is designed to manage and automate network security changes while maintaining audit trails and compliance controls. The flaw allows attackers to inject malicious scripts into the application's persistent storage mechanisms, creating a persistent threat that can affect all users interacting with the system.
The technical implementation of this vulnerability stems from insufficient input validation and output encoding within the SecureChange application's data handling processes. When administrators store malicious payloads within the system's configuration or change request management features, these inputs are not properly sanitized before being stored in the database. This allows the malicious JavaScript code to persist within the application's backend storage, where it remains dormant until triggered by subsequent user interactions. The vulnerability operates under CWE-79 which classifies it as a cross-site scripting flaw, specifically a stored XSS variant where the malicious script is stored on the server and executed whenever affected users access the compromised content.
The operational impact of this vulnerability extends beyond typical XSS scenarios due to the privileged access requirements for exploitation. Attackers must first gain administrative credentials to inject the malicious payload, but once successful, the stored script can be triggered by any unauthenticated user who accesses the affected system components. This creates a particularly dangerous scenario where a compromised administrator account could enable attackers to execute arbitrary code against all system users, potentially leading to complete system compromise and unauthorized access to sensitive network change data. The vulnerability affects all TOS versions with SecureChange deployments, making it a widespread concern across multiple product releases and potentially impacting organizations with legacy deployments.
The exploitation chain requires an attacker to first compromise an administrative account, which then allows them to store malicious JavaScript within the SecureChange system's persistent storage. This stored payload can then be triggered when any user, including unauthenticated users, accesses the affected system components. The vulnerability demonstrates the importance of principle of least privilege and proper access controls, as the ability to store malicious content requires administrative privileges but can then be exploited by any user. Organizations should consider implementing additional security controls such as web application firewalls, regular security assessments, and comprehensive monitoring of administrative activities to detect potential exploitation attempts.
Mitigation strategies for CVE-2020-13133 should focus on immediate patch deployment to versions R19.3 HF3 and R20-1 HF1 where the vulnerability has been addressed. Organizations should also implement comprehensive input validation and output encoding controls to prevent similar issues in other applications, following ATT&CK framework techniques related to input validation and output encoding. Additional defensive measures include regular security audits of privileged accounts, enhanced monitoring of administrative activities, and implementation of network segmentation to limit the impact of potential exploitation. The vulnerability highlights the critical importance of timely patch management and proper security controls in privileged access management systems, particularly those handling sensitive network change operations.