CVE-2009-3585 in Bestpractical
Summary
by MITRE
Session fixation vulnerability in html/Elements/SetupSessionCookie in Best Practical Solutions RT 3.0.0 through 3.6.9 and 3.8.x through 3.8.5 allows remote attackers to hijack web sessions by setting the session identifier via a manipulation that leverages a second web server within the same domain.
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Analysis
by VulDB Data Team • 04/14/2025
The vulnerability identified as CVE-2009-3585 represents a critical session fixation flaw affecting Best Practical Solutions RT versions 3.0.0 through 3.6.9 and 3.8.x through 3.8.5. This security weakness resides within the html/Elements/SetupSessionCookie component of the RT application, creating a pathway for remote attackers to compromise user sessions through sophisticated manipulation techniques. The vulnerability specifically exploits the improper handling of session identifiers, allowing malicious actors to establish persistent access to user accounts across web applications within the same domain. This type of flaw falls under the CWE-384 category of Session Fixation, which is classified as a high-risk vulnerability in the Common Weakness Enumeration catalog. The ATT&CK framework categorizes this issue under T1566 - Credential Access, specifically targeting T1566.001 - Credentials in Files, as the vulnerability enables attackers to obtain valid session tokens that can be used to impersonate legitimate users.
The technical implementation of this vulnerability stems from the application's failure to properly regenerate session identifiers upon user authentication. When users log into the RT system, the application should generate a new, unpredictable session token that replaces any existing session identifier. However, the flawed implementation allows attackers to set predetermined session cookies that persist across authentication boundaries. This occurs particularly when the application accepts session identifiers from external sources without proper validation or regeneration. Attackers can leverage this weakness by first obtaining a valid session cookie from a victim, then manipulating the application to accept this cookie as valid for subsequent authentication attempts. The vulnerability becomes particularly dangerous when multiple web servers operate within the same domain, as session cookies set by one server can be read and reused by another server within the same domain hierarchy.
The operational impact of CVE-2009-3585 extends beyond simple session hijacking, potentially enabling comprehensive account takeover scenarios that can compromise sensitive data and system integrity. An attacker exploiting this vulnerability can maintain persistent access to user accounts for extended periods, allowing for data exfiltration, unauthorized system modifications, and privilege escalation within the RT environment. The vulnerability affects organizations using RT for ticket management, issue tracking, and collaboration systems, where unauthorized access could lead to exposure of confidential information, disruption of business processes, and potential compliance violations. The session fixation attack vector is particularly concerning because it operates transparently to users and security monitoring systems, as the malicious activity appears to be legitimate user behavior. This vulnerability also poses risks to organizations that rely on RT for critical business operations, as unauthorized access could lead to service disruption, data loss, or regulatory penalties.
Mitigation strategies for CVE-2009-3585 require immediate implementation of session management best practices and application-level security controls. Organizations should upgrade to RT versions that address this vulnerability, as patches are available for all affected versions. The fundamental fix involves implementing proper session regeneration upon successful authentication, ensuring that new session tokens are generated and validated before any user access is granted. Security measures should include implementing secure session cookie attributes such as HttpOnly, Secure, and SameSite flags to prevent cross-site scripting and cross-site request forgery attacks. Additionally, organizations should deploy web application firewalls and intrusion detection systems that can monitor for suspicious session cookie manipulation patterns. The implementation of multi-factor authentication and regular session timeout configurations further reduces the attack surface. According to industry standards and the NIST Cybersecurity Framework, organizations must maintain regular vulnerability assessments and security patch management processes to prevent exploitation of known vulnerabilities like CVE-2009-3585. Network segmentation and monitoring of session-related activities can provide additional layers of defense against session fixation attacks, while regular security awareness training for administrators ensures proper configuration and maintenance of session management components.