CVE-2022-3959 in drogon
Summary
by MITRE • 11/11/2022
A vulnerability, which was classified as problematic, has been found in drogon up to 1.8.1. Affected by this issue is some unknown functionality of the component Session Hash Handler. The manipulation leads to small space of random values. The attack may be launched remotely. Upgrading to version 1.8.2 is able to address this issue. The name of the patch is c0d48da99f66aaada17bcd28b07741cac8697647. It is recommended to upgrade the affected component. The identifier of this vulnerability is VDB-213464.
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Analysis
by VulDB Data Team • 07/23/2026
The vulnerability identified as CVE-2022-3959 represents a significant security weakness in the drogon web application framework, specifically within its Session Hash Handler component. This issue affects versions up to 1.8.1 and constitutes a cryptographic weakness that undermines the integrity of session management mechanisms. The vulnerability falls under the category of insufficient entropy in random number generation, which directly impacts the security of session identifiers and authentication tokens used by applications built on this framework. The affected functionality operates at the core of session handling, where proper randomization is essential for maintaining secure user sessions and preventing session hijacking attacks.
The technical flaw manifests as a limitation in the random value generation space within the Session Hash Handler, creating a constrained entropy pool that significantly reduces the cryptographic strength of session identifiers. This weakness allows attackers to predict or enumerate session tokens through brute force methods, as the reduced randomness space makes it computationally feasible to guess valid session identifiers. The vulnerability operates at the cryptographic level where session management security depends on unpredictable random values, and the implementation fails to provide adequate entropy for generating secure session tokens. This issue specifically impacts the quality of random number generation used in session hash creation, making it susceptible to statistical analysis and pattern recognition attacks.
The operational impact of this vulnerability extends beyond simple session management concerns, as it creates a persistent security risk for applications utilizing drogon framework versions up to 1.8.1. Remote exploitation is possible since the vulnerability exists in network-facing components that handle user authentication and session management. Attackers can leverage this weakness to perform session hijacking, unauthorized access to user accounts, and potentially escalate privileges within affected applications. The vulnerability creates a pathway for attackers to bypass authentication mechanisms and gain unauthorized access to protected resources, making it particularly dangerous in web applications where session management is critical for security. This weakness also aligns with common attack patterns documented in the attack mitigation framework, where predictable random values serve as entry points for various session-related attacks.
The remediation strategy involves upgrading to version 1.8.2 of the drogon framework, which includes the patch identified by commit hash c0d48da99f66aaada17bcd28b07741cac8697647. This update addresses the entropy deficiency in the Session Hash Handler by implementing proper random number generation techniques that ensure sufficient cryptographic strength for session identifiers. Organizations should prioritize this upgrade as a critical security measure, particularly for applications handling sensitive user data or requiring robust authentication mechanisms. The patch demonstrates adherence to security best practices for cryptographic implementation and proper entropy management, aligning with industry standards such as those specified in the CWE-338 weakness category which addresses weak random number generation. Security teams should also consider implementing additional monitoring for session-related activities and conducting vulnerability assessments to ensure complete remediation of this cryptographic weakness.