CVE-2022-4877 in keter
Summary
by MITRE • 01/09/2023
A vulnerability has been found in snoyberg keter up to 1.8.1 and classified as problematic. This vulnerability affects unknown code of the file Keter/Proxy.hs. The manipulation of the argument host leads to cross site scripting. The attack can be initiated remotely. Upgrading to version 1.8.2 is able to address this issue. The name of the patch is d41f3697926b231782a3ad8050f5af1ce5cc40b7. It is recommended to upgrade the affected component. The identifier of this vulnerability is VDB-217444.
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Analysis
by VulDB Data Team • 01/28/2023
The vulnerability identified as CVE-2022-4877 represents a cross-site scripting flaw within the snoyberg keter web application deployment tool, specifically affecting versions up to 1.8.1. This issue resides in the Keter/Proxy.hs file where improper handling of the host argument creates a security exposure that allows malicious actors to inject arbitrary JavaScript code into web applications. The vulnerability's classification as problematic indicates a significant security risk that could potentially compromise user sessions and data integrity across deployed web applications.
The technical exploitation of this vulnerability occurs through manipulation of the host argument parameter within the proxy functionality, which serves as an entry point for attackers to execute malicious scripts in the context of affected web applications. This particular flaw demonstrates a classic cross-site scripting vulnerability where user-controllable input flows directly into the application's output without proper sanitization or encoding mechanisms. The remote attack vector means that adversaries can trigger this vulnerability from external networks without requiring local system access, making it particularly dangerous for production environments.
The operational impact of CVE-2022-4877 extends beyond simple script execution as it could enable attackers to perform session hijacking, steal sensitive user information, deface web applications, or redirect users to malicious websites. This vulnerability affects the core proxy functionality of keter, which serves as a reverse proxy for web applications, meaning that any web application deployed through this tool could become compromised. The vulnerability's presence in the proxy layer creates a potential attack surface that could affect multiple applications simultaneously, depending on how the keter deployment system is configured and used.
Security professionals should note that this vulnerability aligns with CWE-79, which specifically addresses cross-site scripting flaws in web applications, and follows patterns commonly seen in ATT&CK technique T1566 related to spearphishing attacks that leverage web-based vulnerabilities. The recommended remediation involves upgrading to version 1.8.2, which includes the patch identified by commit hash d41f3697926b231782a3ad8050f5af1ce5cc40b7. Organizations should implement this upgrade immediately while also conducting thorough security assessments of their deployed applications to ensure no malicious code has been injected through this vulnerability. Additionally, implementing proper input validation and output encoding mechanisms in proxy configurations would provide additional defense-in-depth measures against similar vulnerabilities in the future.