CVE-2022-1213 in livehelperchat
Summary
by MITRE • 04/05/2022
SSRF filter bypass port 80, 433 in GitHub repository livehelperchat/livehelperchat prior to 3.67v. An attacker could make the application perform arbitrary requests, bypass CVE-2022-1191
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Analysis
by VulDB Data Team • 04/06/2022
The vulnerability identified as CVE-2022-1213 represents a critical server-side request forgery flaw in the livehelperchat/livehelperchat repository prior to version 3.67. This issue specifically targets the application's input validation mechanisms for port restrictions, allowing attackers to bypass security controls that should have prevented requests to common web ports. The vulnerability stems from inadequate filtering of port specifications in URL handling within the application's remote request functionality, creating an avenue for malicious actors to circumvent intended security boundaries. The flaw is particularly concerning as it directly undermines the protections implemented in CVE-2022-1191, which was designed to address similar SSRF concerns but was subsequently bypassed by this new vulnerability. The technical implementation of this bypass occurs when the application processes user-supplied URLs without proper validation of port numbers, enabling attackers to specify ports 80 and 433 which are typically considered safe but can be exploited to access internal resources or external systems that should remain isolated from user interactions. This vulnerability operates at the application layer and leverages the principle of least privilege by allowing unauthorized access to network resources that should be restricted to legitimate administrative or internal communications.
The operational impact of CVE-2022-1213 extends beyond simple data exfiltration or service disruption, as it provides attackers with the capability to perform reconnaissance on internal networks and potentially access sensitive systems that may be running on the same infrastructure. The bypass of the previously implemented CVE-2022-1191 protections demonstrates a regression in security controls that could allow attackers to escalate their initial access into more comprehensive attacks. Attackers can leverage this vulnerability to make arbitrary requests to internal services, potentially accessing databases, administrative interfaces, or other internal systems that would normally be protected by network segmentation. The specific targeting of ports 80 and 433 is significant because these are commonly used for web services and can be used to access internal web applications or APIs that may not have proper authentication mechanisms in place. This vulnerability aligns with CWE-918, which describes server-side request forgery vulnerabilities that allow attackers to manipulate the target of a request, and follows patterns typically associated with ATT&CK technique T1071.004 for application layer protocol, where attackers exploit weaknesses in application logic to bypass security controls. The vulnerability can be exploited through user input fields that accept URLs or remote resource specifications, making it particularly dangerous in chat applications where users may be prompted to enter external links or resources.
Mitigation strategies for CVE-2022-1213 require immediate implementation of robust input validation and sanitization procedures that explicitly reject or filter out potentially dangerous port specifications. Organizations should implement comprehensive URL parsing mechanisms that validate not only the scheme and host but also the port specification, ensuring that requests to restricted ports are properly blocked or redirected. The recommended approach includes implementing strict allowlists for acceptable ports and hosts, combined with proper network segmentation that prevents direct access to internal services from the application layer. Security teams should also deploy network monitoring solutions that can detect anomalous traffic patterns originating from the affected application, particularly requests to internal network resources or external systems that should not be accessible through the chat interface. Updates to the livehelperchat application to version 3.67 or later are essential as this release includes the necessary fixes to address the port filtering bypass. Additionally, organizations should conduct thorough security testing of all input validation mechanisms and implement automated scanning tools that can detect similar vulnerabilities in other applications that may be using similar remote request processing patterns. The vulnerability highlights the importance of maintaining comprehensive security controls and the need for continuous monitoring of security patches to ensure that previously addressed vulnerabilities are not reintroduced through regressions or improper implementation of security measures.