CVE-2023-46263 in Avalanche
Summary
by MITRE • 12/19/2023
An unrestricted upload of file with dangerous type vulnerability exists in Avalanche versions 6.4.1 and below that could allow an attacker to achieve a remote code execution.
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Analysis
by VulDB Data Team • 01/13/2024
The vulnerability identified as CVE-2023-46263 represents a critical security flaw in Avalanche versions 6.4.1 and earlier, where the application fails to properly validate file types during upload operations. This weakness stems from inadequate input sanitization mechanisms that permit attackers to upload malicious files with potentially dangerous extensions. The vulnerability falls under the category of unrestricted file uploads, which is classified as CWE-434 within the Common Weakness Enumeration framework. Such flaws typically arise when applications do not enforce strict file type validation or rely solely on client-side checks that can be easily bypassed by malicious actors.
The technical exploitation of this vulnerability occurs when an attacker successfully uploads a file with a dangerous type that the application does not properly restrict. This could include executable files, script files, or other malicious payloads that the server will process and execute. The impact of this flaw extends beyond simple data compromise, as it can lead to complete system compromise through remote code execution capabilities. Attackers can leverage this vulnerability to establish persistent access, escalate privileges, and potentially move laterally within the network infrastructure. The vulnerability aligns with ATT&CK technique T1190 which describes the use of compromised systems to host malicious content, and T1059 which covers the execution of commands through various interfaces.
The operational impact of CVE-2023-46263 is severe and multifaceted, affecting organizations that rely on Avalanche for their operational needs. A successful exploitation could result in unauthorized access to sensitive data, system compromise, and potential disruption of business operations. The vulnerability's presence in versions 6.4.1 and below indicates a widespread risk across installations that have not yet received security updates. Organizations utilizing these older versions face significant exposure to attackers who may target the platform to gain unauthorized access to their systems and data.
Mitigation strategies for this vulnerability must address both immediate remediation and long-term security improvements. The primary recommendation involves upgrading to Avalanche versions that have addressed this vulnerability through proper file type validation and sanitization. Organizations should implement strict file type restrictions on all upload mechanisms, ensuring that only approved file extensions are accepted. Additional protective measures include implementing Content Security Policies, using secure file storage mechanisms, and conducting regular security assessments. The vulnerability also underscores the importance of server-side validation over client-side checks, as the latter can be easily circumvented. Organizations should also consider implementing web application firewalls and monitoring for suspicious upload activities to detect potential exploitation attempts. Proper logging and alerting mechanisms are essential to identify and respond to unauthorized file upload activities that may indicate exploitation attempts.