CVE-2013-6796 in DeepOfix
Summary
by MITRE
The SMTP server in DeepOfix 3.3 and earlier allows remote attackers to bypass authentication via an empty password, which triggers an LDAP anonymous bind.
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Analysis
by VulDB Data Team • 12/01/2024
The vulnerability identified as CVE-2013-6796 resides within the SMTP server implementation of DeepOfix version 3.3 and earlier systems. This represents a critical authentication bypass flaw that fundamentally undermines the security posture of email services relying on this software. The vulnerability specifically targets the interaction between the SMTP server and LDAP directory services, creating a pathway for unauthorized access that bypasses normal authentication mechanisms.
The technical flaw manifests when an attacker submits an empty password during the authentication process to the SMTP server. This seemingly innocuous action triggers an LDAP anonymous bind operation, effectively allowing unauthorized users to establish connections to the email system without proper credentials. The underlying mechanism exploits the LDAP protocol's default behavior of accepting anonymous binds when no valid credentials are provided, a feature that DeepOfix fails to properly control or validate within its SMTP authentication flow.
This vulnerability creates significant operational impact by enabling remote attackers to gain unauthorized access to email services, potentially leading to data exfiltration, email spoofing, spam relay, and further network infiltration. The anonymous bind operation allows attackers to enumerate users, access email accounts, and potentially modify system configurations. From a cybersecurity perspective, this vulnerability directly relates to CWE-287 which addresses improper authentication issues, and can be categorized under ATT&CK technique T1078 for valid accounts and T1566 for phishing with a focus on credential theft.
The security implications extend beyond immediate unauthorized access as this vulnerability can serve as a stepping stone for more sophisticated attacks within a network environment. Attackers can leverage this flaw to establish persistent access, conduct reconnaissance activities, and potentially escalate privileges through additional exploitation vectors. Organizations using DeepOfix versions prior to the fix are particularly vulnerable as the flaw exists at the core authentication layer, making it extremely difficult to detect and mitigate without proper patching.
Mitigation strategies should focus on immediate patching of the DeepOfix software to version 3.4 or later, which addresses this specific authentication bypass vulnerability. Network administrators should also implement additional monitoring of SMTP authentication attempts and LDAP bind operations to detect anomalous behavior. The configuration should be reviewed to disable anonymous LDAP binds when not explicitly required for legitimate operations, and proper access controls should be enforced at the network level to limit exposure of the SMTP service to trusted networks only. Additionally, implementing multi-factor authentication mechanisms and regular security audits of directory services will help prevent similar vulnerabilities from being exploited in the future.