CVE-2017-2145 in Garoon
Summary
by MITRE
Session fixation vulnerability in Cybozu Garoon 4.0.0 to 4.2.4 allows remote attackers to perform arbitrary operations via unspecified vectors.
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Analysis
by VulDB Data Team • 10/24/2019
The session fixation vulnerability identified as CVE-2017-2145 affects Cybozu Garoon versions 4.0.0 through 4.2.4, representing a critical security flaw that enables remote attackers to hijack user sessions and execute unauthorized operations. This vulnerability stems from the application's failure to properly invalidate session identifiers upon successful authentication, creating a persistent threat vector that can be exploited across various attack scenarios. The unspecified vectors mentioned in the description suggest that the flaw manifests through multiple potential pathways within the application's authentication mechanism, making it particularly challenging to defend against without comprehensive understanding of the specific implementation details.
The technical nature of this vulnerability aligns with CWE-384, which specifically addresses session fixation issues where the application fails to invalidate old session identifiers when establishing new ones. This flaw operates by allowing attackers to manipulate session tokens in such a way that they can maintain access to user accounts even after legitimate authentication attempts occur. The vulnerability essentially permits an attacker to establish a session with a known session identifier before a user authenticates, then exploit the session after the user logs in, effectively gaining unauthorized access to the victim's account and privileges. The impact extends beyond simple unauthorized access to include potential data manipulation, privilege escalation, and complete account compromise within the Garoon environment.
From an operational standpoint, this vulnerability creates significant risks for organizations relying on Cybozu Garoon for business collaboration and document management services. Attackers can leverage this flaw to perform arbitrary operations including but not limited to accessing confidential documents, modifying user permissions, creating malicious entries, and conducting persistent surveillance of user activities. The remote nature of the attack means that threat actors do not require physical access to the network or system, enabling them to exploit the vulnerability from anywhere on the internet. This characteristic makes the vulnerability particularly dangerous in enterprise environments where sensitive business data and intellectual property are stored, potentially leading to substantial financial losses, regulatory compliance violations, and reputational damage.
The attack surface for this vulnerability is broad and encompasses various attack patterns documented in the MITRE ATT&CK framework, particularly those related to credential access and privilege escalation techniques. The vulnerability can be exploited as part of a broader attack chain where initial access is gained through session fixation, followed by lateral movement and persistence within the network. Organizations should consider implementing immediate mitigations including session token regeneration upon authentication, proper session invalidation protocols, and network-based intrusion detection measures to monitor for suspicious authentication patterns. Additionally, the vulnerability highlights the importance of regular security assessments and patch management processes to prevent exploitation of known vulnerabilities in collaboration platforms that handle sensitive organizational data.