CVE-2022-1713 in drawio
Summary
by MITRE • 05/16/2022
SSRF on /proxy in GitHub repository jgraph/drawio prior to 18.0.4. An attacker can make a request as the server and read its contents. This can lead to a leak of sensitive information.
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Analysis
by VulDB Data Team • 05/18/2022
The vulnerability identified as CVE-2022-1713 represents a critical server-side request forgery flaw within the jgraph/drawio repository software. This issue affects versions prior to 18.0.4 and specifically targets the /proxy endpoint, which serves as a gateway for external resource requests. The vulnerability stems from inadequate input validation and sanitization mechanisms that allow malicious actors to manipulate the proxy functionality to make unauthorized requests to internal systems. The flaw exists in the application's architecture where user-supplied parameters are directly passed to backend services without proper authorization checks or network boundary enforcement.
The technical implementation of this vulnerability enables attackers to exploit the proxy functionality by crafting malicious requests that bypass normal access controls. When a user submits a request to the vulnerable /proxy endpoint, the application processes the input without sufficient validation, allowing an attacker to specify arbitrary URLs or IP addresses for the proxy to fetch data from. This creates a pathway for internal network reconnaissance, where attackers can probe internal services, databases, or other sensitive systems that would normally be protected by network firewalls or access controls. The vulnerability is classified under CWE-918, which specifically addresses server-side request forgery attacks, and aligns with ATT&CK technique T1046 for network service scanning and T1566 for credential access through social engineering.
The operational impact of this vulnerability extends beyond simple information leakage, as it provides attackers with the capability to perform extensive reconnaissance of internal network infrastructure. An attacker can leverage this flaw to enumerate internal services, identify running applications, and potentially discover sensitive data stored on internal servers. The vulnerability creates a persistent threat vector that allows attackers to maintain access and continue probing internal systems over time, making it particularly dangerous for organizations with complex network architectures. The severity is amplified by the fact that the proxy functionality is often designed to access external resources, but in this case becomes a mechanism for internal network access. Organizations using affected versions of drawio are at risk of unauthorized data access, potential system compromise, and exposure of sensitive infrastructure information.
Mitigation strategies for CVE-2022-1713 require immediate implementation of the vendor-provided patch version 18.0.4, which addresses the input validation issues in the proxy endpoint. Organizations should also implement network-level restrictions that prevent the application from making outbound requests to internal network segments, effectively limiting the scope of potential attacks. Additional defensive measures include implementing strict input validation for all proxy parameters, enforcing network segmentation between the application and internal systems, and deploying web application firewalls that can detect and block suspicious proxy requests. Security teams should conduct thorough network audits to identify any unauthorized access patterns that may have occurred during the vulnerability window, and establish monitoring protocols that can detect anomalous proxy usage patterns. The vulnerability underscores the importance of proper input validation and the principle of least privilege in web application security, particularly for applications that handle external resource requests.