CVE-2017-12619 in Zeppelin
Summary
by MITRE
Apache Zeppelin prior to 0.7.3 was vulnerable to session fixation which allowed an attacker to hijack a valid user session. Issue was reported by "stone lone".
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Analysis
by VulDB Data Team • 09/06/2023
Apache Zeppelin versions prior to 0.7.3 contained a critical session fixation vulnerability that enabled attackers to hijack valid user sessions through improper session management mechanisms. This vulnerability arose from the application's failure to properly invalidate existing sessions when new authentication occurred, creating a scenario where an attacker could capture a valid session token and reuse it to impersonate legitimate users. The flaw specifically manifested in the authentication flow where session identifiers were not adequately rotated or invalidated upon successful login, allowing session hijacking attacks to succeed. The vulnerability was particularly dangerous because it undermined the fundamental security principle of session isolation, enabling unauthorized access to user accounts and potentially sensitive data within the Zeppelin environment. This issue represented a direct violation of secure session management practices and could be exploited by attackers who gained access to session tokens through various means such as network sniffing, cross-site scripting attacks, or other session-related vulnerabilities.
The technical implementation of this vulnerability stemmed from the application's session handling code failing to properly destroy or regenerate session identifiers during the authentication process. When users authenticated to the Zeppelin interface, the system did not invalidate the previous session state before establishing a new one, leaving the original session token valid and usable by an attacker who had obtained it. This behavior created a window of opportunity where session tokens could be reused across different user contexts, effectively allowing attackers to maintain persistent access to systems they had initially compromised. The vulnerability was particularly concerning in environments where Zeppelin was used for data analysis and visualization of sensitive information, as it could enable unauthorized access to confidential datasets and analytical capabilities. From a security controls perspective, this flaw demonstrated a failure in the principle of least privilege and proper session lifecycle management, which are fundamental requirements for maintaining application security.
The operational impact of CVE-2017-12619 extended beyond simple unauthorized access to encompass potential data breaches, privilege escalation, and persistent backdoor access within affected environments. Organizations utilizing vulnerable Zeppelin installations faced significant risk of unauthorized data access, particularly in scenarios where the platform was used for sensitive business intelligence or research data analysis. The vulnerability could be exploited by attackers who had already gained some level of access to the system, making it particularly dangerous in compromised environments where attackers could leverage this flaw to maintain persistence. Additionally, the session fixation nature of the vulnerability meant that attackers could potentially access multiple user accounts simultaneously, amplifying the potential impact of a single successful exploitation. This vulnerability also highlighted the importance of proper session management in web applications and demonstrated how seemingly minor implementation flaws could result in significant security consequences, particularly when dealing with platforms that handle sensitive analytical data.
Mitigation strategies for CVE-2017-12619 focused primarily on upgrading to Apache Zeppelin version 0.7.3 or later, which contained the necessary fixes to properly invalidate and regenerate session identifiers during authentication processes. Organizations should also implement additional security controls including network segmentation, proper access controls, and monitoring of authentication activities to detect potential exploitation attempts. The fix implemented in version 0.7.3 addressed the root cause by ensuring that session identifiers are properly invalidated upon successful authentication, preventing the reuse of session tokens and eliminating the session fixation attack vector. Security teams should also consider implementing additional protections such as secure cookie attributes, proper session timeout mechanisms, and regular security assessments of web applications to identify similar vulnerabilities. From a compliance perspective, this vulnerability highlighted the need for organizations to maintain up-to-date security patches and implement proper vulnerability management processes to prevent exploitation of known security flaws. The incident also underscored the importance of following secure coding practices and conducting thorough security reviews of authentication mechanisms to prevent similar issues from occurring in other applications. This vulnerability aligns with CWE-384, which addresses session fixation vulnerabilities, and represents a classic example of how inadequate session management can compromise application security.