CVE-2008-7078 in Rumpus
Summary
by MITRE
Multiple buffer overflows in Rumpus before 6.0.1 allow remote attackers to (1) cause a denial of service (segmentation fault) via a long HTTP verb in the HTTP component; and allow remote authenticated users to execute arbitrary code via a long argument to the (2) MKD, (3) XMKD, (4) RMD, and other unspecified commands in the FTP component.
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Analysis
by VulDB Data Team • 11/12/2024
The vulnerability identified as CVE-2008-7078 represents a critical security flaw in the Rumpus file transfer server software prior to version 6.0.1. This vulnerability manifests as multiple buffer overflow conditions that expose the system to both denial of service attacks and remote code execution capabilities. The affected software operates as a comprehensive file sharing and web server solution that supports both ftp and http protocols, making it a prime target for exploitation in environments where file sharing and web access are critical components of network infrastructure. The vulnerability's impact extends across multiple protocol implementations within the same software framework, indicating a fundamental design flaw in input validation mechanisms.
The technical implementation of this vulnerability stems from inadequate bounds checking in the software's handling of user-supplied data within both http and ftp protocol components. Specifically, the http component suffers from a buffer overflow when processing excessively long HTTP verbs, which are the request methods such as GET, POST, PUT, or custom verbs used in web communications. This type of overflow falls under the CWE-121 buffer overflow category, where insufficient bounds checking allows attackers to overwrite adjacent memory locations. The ftp component exhibits similar vulnerabilities when processing commands such as MKD (make directory), XMKD (extended make directory), and RMD (remove directory) along with other unspecified commands. These commands are processed without proper input length validation, allowing attackers to craft malicious arguments that exceed the allocated buffer space.
The operational impact of this vulnerability is severe and multifaceted, presenting attackers with two distinct attack vectors that can be exploited in different scenarios. The first vector enables remote attackers to trigger segmentation faults through carefully crafted long HTTP verbs, resulting in service disruption and denial of service conditions that can render the file sharing server unavailable to legitimate users. This attack vector directly aligns with the ATT&CK technique T1499.004 for network denial of service, where adversaries compromise availability by causing system crashes or resource exhaustion. The second vector provides authenticated attackers with the capability to execute arbitrary code on the target system, which represents a critical privilege escalation scenario. This code execution vulnerability allows attackers to gain full control over the affected server, potentially enabling them to establish persistent access, escalate privileges, or use the compromised system as a launch point for further attacks within the network infrastructure.
The exploitation of these buffer overflows follows established patterns in software security vulnerabilities, where insufficient input validation creates opportunities for attackers to manipulate memory layout and control program execution flow. Attackers can leverage these conditions to overwrite return addresses, function pointers, or other critical memory locations, potentially leading to complete system compromise. The vulnerability affects the broader category of network services and file sharing applications, making it particularly dangerous in enterprise environments where such services are commonly deployed. Organizations running vulnerable versions of Rumpus face significant risk of unauthorized access and potential data breaches, as the combination of denial of service and code execution capabilities provides attackers with both immediate disruption and long-term access opportunities. The vulnerability demonstrates the critical importance of implementing robust input validation and bounds checking mechanisms in network services, particularly those handling user-supplied data from remote sources. Mitigation strategies should include immediate patching to version 6.0.1 or later, along with network segmentation and monitoring to detect potential exploitation attempts. Additionally, implementing proper access controls and limiting the exposure of vulnerable services to trusted networks can help reduce the attack surface and minimize potential impact from such vulnerabilities.