CVE-2009-2770 in PowerUpload
Summary
by MITRE
PowerUpload 2.4 allows remote attackers to bypass authentication and gain administrative access via a MIME encoded value of admin for the myadminname cookie.
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Analysis
by VulDB Data Team • 12/07/2024
The vulnerability described in CVE-2009-2770 represents a critical authentication bypass flaw in PowerUpload 2.4, a web-based file upload application. This issue stems from improper input validation and handling of authentication tokens within the application's cookie management system. The vulnerability specifically affects the myadminname cookie parameter, which is used to verify administrative privileges within the application's backend. When an attacker crafts a malicious request containing a MIME encoded value of "admin" for the myadminname cookie, the application fails to properly validate this input, allowing unauthorized access to administrative functions.
The technical exploitation of this vulnerability occurs through the manipulation of HTTP cookies, specifically targeting the authentication mechanism that relies on cookie values to determine user privileges. The MIME encoding aspect of the attack vector indicates that the application does not properly decode or validate encoded cookie values before processing them for authentication decisions. This represents a classic case of insufficient input sanitization and validation, where the application trusts cookie data without proper verification. The flaw essentially allows any remote attacker to impersonate an administrator by simply setting a specially crafted cookie value, bypassing all standard authentication procedures that should normally be required to access administrative interfaces.
The operational impact of this vulnerability is severe and far-reaching, as it completely undermines the application's security model and provides attackers with full administrative control over the affected system. Once an attacker successfully exploits this vulnerability, they gain complete access to all administrative functions, including but not limited to user management, system configuration changes, file upload and deletion capabilities, and potentially access to sensitive data stored within the application. This level of access enables attackers to perform destructive operations, install backdoors, modify system configurations, or exfiltrate confidential information. The remote nature of the attack means that exploitation can occur from any location without requiring physical access to the system or knowledge of internal network details.
This vulnerability aligns with CWE-287, which addresses improper authentication issues in software systems, and represents a clear violation of the principle of least privilege in cybersecurity. From an ATT&CK framework perspective, this vulnerability maps to technique T1078 for valid accounts and T1566 for phishing, as the attacker can effectively assume administrative privileges without proper authentication. The attack vector specifically relates to T1078.002 which involves legitimate credentials, and T1212 which covers exploitation for privilege escalation. The remediation strategy must focus on implementing proper cookie validation mechanisms, ensuring that all cookie values are properly decoded and validated before being accepted as legitimate authentication tokens. Organizations should implement input sanitization for all cookie parameters, enforce strict validation of administrative privileges, and consider implementing additional security measures such as secure cookie flags, HTTP-only flags, and proper session management to prevent similar vulnerabilities from occurring in the future.