CVE-2008-1276 in Mailenable Enterprise
Summary
by MITRE
Multiple buffer overflows in the IMAP service (MEIMAPS.EXE) in MailEnable Professional Edition and Enterprise Edition 3.13 and earlier allow remote authenticated attackers to execute arbitrary code via long arguments to the (1) FETCH, (2) EXAMINE, and (3) UNSUBSCRIBE commands.
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Analysis
by VulDB Data Team • 10/19/2024
The vulnerability identified as CVE-2008-1276 represents a critical buffer overflow condition affecting the IMAP service component of MailEnable email server software. This flaw exists within the MEIMAPS.EXE executable file that handles IMAP protocol communications, specifically impacting MailEnable Professional Edition and Enterprise Edition versions 3.13 and earlier. The vulnerability stems from inadequate input validation mechanisms within the service's handling of IMAP commands, creating exploitable conditions that can be leveraged by malicious actors.
The technical implementation of this vulnerability manifests through three distinct command vectors within the IMAP protocol interface. Attackers can exploit the buffer overflow condition by sending specially crafted long argument strings to the FETCH command, which is used to retrieve messages from mailboxes, the EXAMINE command that allows users to examine mailboxes without setting the read-only flag, and the UNSUBSCRIBE command that removes mailbox subscriptions. These commands all share a common flaw in their argument processing logic where input strings are copied into fixed-size buffers without proper bounds checking, leading to memory corruption that can be manipulated to overwrite critical program execution data.
The operational impact of this vulnerability extends beyond simple denial of service conditions, as it provides authenticated attackers with the capability to execute arbitrary code on vulnerable systems. This represents a severe privilege escalation scenario where an attacker who has already established legitimate email account access can leverage this flaw to gain full system control. The attack requires only authenticated access to the IMAP service, making it particularly dangerous as it can be exploited by insiders or compromised legitimate users. The buffer overflow conditions create opportunities for stack smashing attacks that can redirect program execution flow to malicious code injected by the attacker.
From a cybersecurity framework perspective, this vulnerability aligns with CWE-121, which describes stack-based buffer overflow conditions, and CWE-122, which addresses heap-based buffer overflows, though the specific implementation appears to focus on stack corruption. The attack pattern follows the MITRE ATT&CK framework's technique T1059.007 for command and script interpreter execution, as successful exploitation would likely involve executing shellcode or malicious payloads. Additionally, this vulnerability demonstrates characteristics of T1210, privilege escalation through exploitation of software vulnerabilities, since it allows attackers to elevate their privileges from legitimate email user to system administrator level access.
The mitigation strategies for this vulnerability center on immediate software updates and patches provided by MailEnable, as well as network-level security controls. Organizations should implement mandatory patch management procedures to ensure all affected MailEnable installations receive the vendor-provided security updates. Network segmentation and access controls should be enforced to limit IMAP service exposure, while monitoring systems should be deployed to detect anomalous command patterns that might indicate exploitation attempts. Additionally, implementing principle of least privilege configurations for email service accounts and regular security assessments of email infrastructure will help reduce the attack surface and prevent unauthorized access to vulnerable IMAP services.