CVE-2008-1498 in Surgemail
Summary
by MITRE
Stack-based buffer overflow in the IMAP service in NetWin Surgemail 3.8k4-4 and earlier allows remote authenticated users to execute arbitrary code via a long first argument to the LIST command.
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Analysis
by VulDB Data Team • 10/19/2024
The vulnerability identified as CVE-2008-1498 represents a critical stack-based buffer overflow flaw within the IMAP service of NetWin Surgemail versions 3.8k4-4 and earlier. This vulnerability resides in the handling of the LIST command, which is a standard command used in IMAP protocol implementations for retrieving mailbox listings. The flaw specifically manifests when the IMAP service processes a maliciously crafted first argument to the LIST command, creating a condition where user-supplied input exceeds the allocated stack buffer space. This type of vulnerability falls under the CWE-121 stack-based buffer overflow category, which is classified as a fundamental memory safety issue that has been consistently exploited in various network services over many years. The vulnerability is particularly concerning because it requires only authenticated access to exploit, meaning that an attacker who has already obtained valid credentials can leverage this flaw to execute arbitrary code on the affected system.
The technical implementation of this vulnerability involves the IMAP service's inadequate input validation mechanisms when processing the LIST command parameters. When a legitimate user authenticates to the IMAP service and subsequently sends a LIST command with an excessively long first argument, the service fails to properly bounds-check the input before copying it into a fixed-size stack buffer. This buffer overflow condition allows an attacker to overwrite adjacent memory locations including return addresses and control registers, effectively hijacking the program execution flow. The exploitation process typically involves crafting a specially formatted argument that, when processed, overflows the stack buffer and redirects execution to malicious code injected by the attacker. This technique aligns with common exploit frameworks described in the ATT&CK matrix under the T1059.007 technique for command and scripting interpreter, as well as T1068 for exploit for privilege escalation.
The operational impact of this vulnerability extends beyond simple code execution, as it provides attackers with a potential foothold for further system compromise. Once an attacker successfully exploits this vulnerability, they gain the ability to execute arbitrary code with the privileges of the IMAP service process, which typically runs with elevated permissions on the host system. This could potentially lead to complete system compromise, data exfiltration, or the establishment of persistent backdoors. The vulnerability affects organizations that rely on older versions of NetWin Surgemail, particularly those with legacy email infrastructure that has not been updated or patched. The attack vector requires only network access and valid authentication credentials, making it particularly dangerous in environments where email services are exposed to external networks or where credential compromise is possible through social engineering or other means. Organizations running vulnerable versions of this software face significant risk, as the vulnerability has been known since 2008 and represents a well-documented exploitation pattern that has been widely documented in security research and exploit databases.
Mitigation strategies for CVE-2008-1498 should prioritize immediate patching of affected systems with the vendor-provided security updates or upgrading to supported versions of NetWin Surgemail. Organizations should implement network segmentation to limit access to IMAP services and ensure that only authorized users can authenticate to the system. Additional defensive measures include implementing network intrusion detection systems that can identify suspicious LIST command patterns and monitoring for unusual authentication activity. Security teams should also consider disabling unnecessary IMAP features and implementing strict access controls for email services. The vulnerability demonstrates the importance of maintaining up-to-date software and security patches, as this particular flaw has existed for over a decade and represents a classic example of how insufficient input validation can lead to critical security consequences. Organizations should conduct comprehensive vulnerability assessments to identify all instances of this software and ensure that proper security controls are in place to protect against similar vulnerabilities in other services.