CVE-2006-0798 in Mail Solution
Summary
by MITRE
Multiple directory traversal vulnerabilities in the IMAP service in Macallan Mail Solution before 4.8.05.004 allow remote authenticated users to read e-mails of other users or create, modify, or delete directories via a .. (dot dot) in the argument to the (1) CREATE, (2) SELECT, (3) DELETE, or (4) RENAME commands.
Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.
Analysis
by VulDB Data Team • 06/14/2019
The CVE-2006-0798 vulnerability represents a critical directory traversal flaw in the IMAP service component of Macallan Mail Solution versions prior to 4.8.05.004. This vulnerability exposes a fundamental security weakness in how the mail server handles user authentication and file system operations through IMAP commands. The flaw specifically affects four core IMAP operations that manipulate mailbox structures and access control, creating a pathway for authenticated attackers to bypass normal access controls and gain unauthorized access to other users' email data or manipulate directory structures within the mail server's file system.
The technical exploitation of this vulnerability relies on the improper validation of user-supplied input in IMAP command arguments. When authenticated users submit commands containing directory traversal sequences using the .. (dot dot) notation, the IMAP service fails to adequately sanitize these inputs before processing them against the underlying file system. This lack of input validation creates a direct path for attackers to navigate beyond the intended mailbox boundaries and access files or directories that should be restricted to specific user accounts. The vulnerability is particularly dangerous because it operates at the file system level rather than just the application level, allowing for extensive data access and modification capabilities.
From an operational perspective, this vulnerability poses significant risks to email server security and data integrity. An authenticated attacker can leverage this flaw to read confidential emails belonging to other users, potentially accessing sensitive business information, personal communications, or proprietary data. The ability to create, modify, or delete directories through the RENAME and CREATE commands further amplifies the threat, as attackers could potentially disrupt legitimate email operations, hide malicious activities, or establish persistent access points within the email infrastructure. The vulnerability affects the core IMAP functionality that thousands of users rely on for email access, making it a high-value target for exploitation in targeted attacks against organizations.
The security implications of CVE-2006-0798 align with CWE-22 (Improper Limitation of a Pathname to a Restricted Directory) and represent a classic example of path traversal attacks that have been documented in various security frameworks including the MITRE ATT&CK framework under techniques related to privilege escalation and credential access. Organizations implementing this mail solution would have been vulnerable to both passive information disclosure and active modification attacks, with potential impacts ranging from data breaches to complete compromise of email infrastructure. The vulnerability demonstrates the critical importance of proper input validation and access control mechanisms in network services, particularly those handling sensitive user data through standard protocols like IMAP.
Effective mitigation strategies for this vulnerability include immediate patching to version 4.8.05.004 or later, which would address the directory traversal flaws in the IMAP service implementation. Organizations should also implement additional security controls such as network segmentation to limit access to mail servers, enforce strict access controls on IMAP services, and monitor for unusual IMAP command patterns that might indicate exploitation attempts. Regular security audits of mail server configurations and input validation mechanisms should be conducted to prevent similar vulnerabilities from emerging in other components of the email infrastructure. The vulnerability serves as a reminder of the critical need for comprehensive security testing and validation of network services that handle user data, particularly those operating at the file system level with elevated privileges.