CVE-2019-10045 in Pydio
Summary
by MITRE
The "action" get_sess_id in the web application of Pydio through 8.2.2 discloses the session cookie value in the response body, enabling scripts to get access to its value. This identifier can be reused by an attacker to impersonate a user and perform actions on behalf of him/her (if the session is still active).
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Analysis
by VulDB Data Team • 09/25/2023
The vulnerability identified as CVE-2019-10045 affects Pydio web applications version 8.2.2 and earlier, representing a critical session management flaw that directly compromises user authentication security. This issue resides within the application's session handling mechanism where the action parameter named "get_sess_id" inadvertently exposes session cookie values in the HTTP response body. The flaw constitutes a direct violation of secure session management principles and creates a significant attack surface for malicious actors seeking unauthorized access to user accounts.
The technical implementation of this vulnerability stems from improper input validation and output sanitization within the Pydio application's web interface. When an attacker invokes the specific action endpoint with the get_sess_id parameter, the system returns the session identifier in plaintext format within the response payload rather than implementing proper access controls or authentication checks. This behavior aligns with CWE-200, which addresses improper exposure of sensitive information, and specifically demonstrates weaknesses in session management protocols that should prevent such information disclosure. The vulnerability operates at the application layer and can be exploited through various means including cross-site scripting attacks, man-in-the-middle interception, or direct API manipulation.
The operational impact of this vulnerability extends far beyond simple information disclosure, as it enables full account impersonation and unauthorized access to user data. Once an attacker obtains the session cookie value through this flaw, they can reuse it to establish authenticated sessions with the target user's privileges, potentially gaining access to sensitive documents, personal information, and administrative functions depending on the user's role within the application. This represents a direct compromise of the principle of least privilege and can lead to data breaches, unauthorized modifications, and potential lateral movement within the affected systems. The vulnerability is particularly dangerous because it allows attackers to maintain persistent access as long as the session remains valid, creating a window for extended unauthorized activities without detection.
Mitigation strategies for CVE-2019-10045 should focus on immediate patching of the affected Pydio versions to 8.2.3 or later, where the session management has been corrected to prevent session identifier disclosure. Organizations should implement comprehensive network monitoring to detect unusual patterns in API requests that might indicate exploitation attempts. The fix typically involves modifying the web application code to ensure that session identifiers are not returned in response bodies for unauthorized requests, implementing proper authentication checks before session data exposure, and applying input validation to prevent parameter manipulation. Additionally, organizations should consider implementing additional security controls such as secure session cookie attributes, regular security audits, and network segmentation to limit the impact of such vulnerabilities. This vulnerability also highlights the importance of following ATT&CK framework techniques related to credential access and privilege escalation, as it directly enables attackers to move from initial compromise to persistent unauthorized access within the application environment.