CVE-2022-1045 in trudesk
Summary
by MITRE • 04/11/2022
Stored XSS viva .svg file upload in GitHub repository polonel/trudesk prior to v1.2.0.
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Analysis
by VulDB Data Team • 04/13/2022
The vulnerability CVE-2022-1045 represents a stored cross-site scripting flaw that existed in the polonel/trudesk GitHub repository prior to version 1.2.0. This issue specifically emerged through the handling of svg file uploads within the application's storage mechanisms. The vulnerability stems from insufficient input validation and sanitization of file uploads, particularly when processing svg format files that can contain embedded javascript code. When users uploaded svg files to the system, the application failed to properly sanitize the content, allowing malicious svg files with embedded javascript payloads to be stored and subsequently executed in the context of other users' browsers.
The technical flaw manifests in the application's file processing pipeline where svg files are accepted without proper security checks. Svg files are inherently complex XML-based formats that support scripting capabilities through embedded javascript within the document structure. The vulnerability occurs because the system does not adequately filter or escape the content of uploaded svg files before storing them in the database or file system. This allows attackers to craft malicious svg files containing javascript code that executes when other users view the uploaded content. The stored nature of this vulnerability means that the malicious payload persists in the system and affects all users who access the affected content, making it particularly dangerous for collaborative environments.
The operational impact of CVE-2022-1045 extends beyond simple script execution as it can enable attackers to perform various malicious activities including session hijacking, data exfiltration, and privilege escalation within the application. When users view malicious svg files, the embedded javascript can steal cookies, redirect users to malicious sites, or perform actions on behalf of authenticated users. This vulnerability particularly affects web applications that allow file uploads for user-generated content, as it creates a persistent attack vector that remains active until the vulnerability is patched. The impact is amplified in environments where multiple users interact with shared content, as a single malicious upload can compromise the entire user base.
Mitigation strategies for CVE-2022-1045 involve implementing comprehensive input validation and sanitization for all file uploads, particularly svg files. The recommended approach includes converting svg files to raster formats during upload processing, implementing strict content type validation, and employing dedicated svg sanitization libraries that strip out potentially dangerous elements and attributes. Organizations should also implement proper file access controls and regularly audit uploaded content for malicious payloads. The vulnerability aligns with CWE-79 which describes cross-site scripting flaws, and can be mapped to ATT&CK technique T1566 for initial access through malicious file uploads. Patching the application to version 1.2.0 or later resolves the vulnerability by implementing proper input validation and sanitization mechanisms. Additionally, organizations should consider implementing web application firewalls and content security policies to provide additional defense-in-depth measures against similar vulnerabilities in the future.