CVE-2008-1854 in SmarterMail
Summary
by MITRE
Unspecified vulnerability in SmarterMail Web Server (SMWebSvr.exe) in SmarterMail 5.0.2999 allows remote attackers to cause a denial of service (service termination) via a long HTTP (1) GET, (2) HEAD, (3) PUT, (4) POST, or (5) TRACE request. NOTE: the provenance of this information is unknown; the details are obtained solely from third party information.
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Analysis
by VulDB Data Team • 09/22/2018
The vulnerability identified as CVE-2008-1854 represents a critical denial of service weakness within the SmarterMail Web Server component known as SMWebSvr.exe. This issue affects version 5.0.2999 of the SmarterMail email server software, which was widely deployed in enterprise environments for managing email services. The vulnerability manifests when the web server processes HTTP requests that exceed normal parameter lengths, leading to unexpected service termination. This type of vulnerability falls under the category of resource exhaustion attacks where malicious actors can exploit the server's handling of oversized requests to disrupt legitimate service operations. The vulnerability is particularly concerning because it affects multiple HTTP methods including GET, HEAD, PUT, POST, and TRACE, indicating a fundamental flaw in the request parsing and validation logic of the web server component.
The technical flaw stems from inadequate input validation within the SmarterMail web server implementation where the system fails to properly handle oversized HTTP requests. When an attacker sends a malformed request with excessive data in any of the five supported HTTP methods, the web server process becomes unstable and terminates unexpectedly. This behavior represents a classic buffer overflow or input validation failure scenario where the server lacks proper bounds checking mechanisms. The vulnerability operates at the application layer of the network stack, making it accessible to remote attackers without requiring authentication or special privileges. According to CWE classification, this vulnerability would likely map to CWE-122, which deals with insufficient synchronization, or CWE-129, which addresses improper validation of array indices, depending on the exact implementation details of the memory management routines. The attack vector is classified as remote and requires no user interaction, making it particularly dangerous in networked environments.
The operational impact of this vulnerability extends beyond simple service disruption to potentially compromise business continuity and email availability for organizations relying on SmarterMail. When the web server service terminates, legitimate users lose access to email services, which can result in significant productivity losses and communication breakdowns. Organizations may experience cascading effects as email-dependent business processes halt until the service is restored. The vulnerability affects not just email access but also web-based administrative interfaces that rely on the same underlying web server component. In enterprise environments where email systems are critical infrastructure, this type of denial of service can have severe financial implications and may violate service level agreements with customers. From an attacker perspective, this vulnerability represents a low-effort, high-impact method of disrupting services, making it attractive for both opportunistic attacks and targeted campaigns. The ATT&CK framework would categorize this under T1499.004, which covers Network Denial of Service, and potentially T1595.001 for reconnaissance activities leading to service disruption.
Mitigation strategies for this vulnerability should include immediate implementation of network-level protections such as firewall rules that limit request sizes and implement rate limiting to prevent abuse. System administrators should deploy intrusion detection systems that can identify and block suspicious HTTP request patterns. The most effective long-term solution involves applying the vendor-provided security patches or upgrading to newer versions of SmarterMail that have addressed this vulnerability. Organizations should also implement monitoring solutions that can detect service termination events and automatically alert administrators to potential exploitation attempts. Network segmentation and access control measures can reduce the attack surface by limiting direct access to the vulnerable web server component. Additionally, implementing web application firewalls can provide an additional layer of protection by filtering malicious requests before they reach the vulnerable server components. Regular security assessments and vulnerability scanning should be conducted to identify similar issues in other components of the email infrastructure. The vulnerability underscores the importance of proper input validation and robust error handling in web server implementations, particularly in mission-critical systems where availability is paramount.