CVE-2007-0854 in cPanel
Summary
by MITRE
Remote file inclusion vulnerability in scripts2/objcache in cPanel WebHost Manager (WHM) allows remote attackers to execute arbitrary code via a URL in the obj parameter. NOTE: a third party claims that this issue is not file inclusion because the contents are not parsed, but the attack can be used to overwrite files in /var/cpanel/objcache or provide unexpected web page contents.
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Analysis
by VulDB Data Team • 08/10/2022
The CVE-2007-0854 vulnerability represents a critical remote code execution flaw within cPanel WebHost Manager's scripting infrastructure. This vulnerability specifically targets the scripts2/objcache component of WHM, which serves as a caching mechanism for various web hosting operations. The flaw arises from insufficient input validation when processing the obj parameter, creating an avenue for malicious actors to inject arbitrary URLs that can be executed within the context of the web server. The vulnerability's classification as remote file inclusion stems from the ability of attackers to leverage the parameter to load and execute code from external sources, effectively bypassing local security controls. According to industry standards, this vulnerability aligns with CWE-88, which describes improper neutralization of argument delimiters in a command, and CWE-94, which encompasses the execution of arbitrary code or commands. The attack vector operates through the manipulation of web requests where the obj parameter is directly incorporated into file operations without adequate sanitization, creating a pathway for unauthorized code execution.
The technical implementation of this vulnerability allows attackers to manipulate the obj parameter in a way that enables file system access and manipulation. While the third-party claim that this isn't traditional file inclusion because content isn't parsed may be technically accurate, the operational impact remains severe as demonstrated by the ability to overwrite files within the sensitive /var/cpanel/objcache directory structure. This directory contains critical caching data and configuration files that when compromised can lead to complete system compromise. The vulnerability enables attackers to inject malicious content that can be served to legitimate users, potentially causing data corruption, unauthorized access, or complete system takeover. The attack can manifest through various payloads including web shells, malicious scripts, or data exfiltration tools that can be executed within the web server context. The flaw essentially transforms the legitimate caching functionality into a weaponized attack surface that can be exploited to gain persistent access to the hosting environment.
The operational impact of CVE-2007-0854 extends far beyond simple code execution, as it provides attackers with the capability to establish persistent footholds within hosting environments that serve numerous clients. When exploited successfully, this vulnerability can lead to complete compromise of the affected server, enabling attackers to manipulate user data, steal credentials, or use the compromised system as a launching point for attacks against other systems. The vulnerability's presence in WHM, which manages hosting accounts and system configurations, makes it particularly dangerous as it provides access to multiple user accounts and their associated data. Organizations running vulnerable cPanel installations face significant risk of data breaches, service disruption, and potential regulatory violations due to the exposure of sensitive customer information. The attack can result in unauthorized modification of system files, installation of backdoors, or complete takeover of hosting services, affecting not only the compromised server but potentially all customers hosted on that system. From an ATT&CK framework perspective, this vulnerability maps to techniques involving command and control communication, privilege escalation, and persistence mechanisms, making it a valuable asset for threat actors seeking long-term access to hosting infrastructure.
Mitigation strategies for CVE-2007-0854 must address both immediate remediation and long-term security improvements. The primary recommendation involves applying the vendor-provided patches and updates that correct the input validation issues in the obj parameter handling within scripts2/objcache. Organizations should implement strict input validation and sanitization for all parameters that are used in file operations, particularly those that may be influenced by external input. Network-level protections including firewall rules and web application firewalls should be configured to restrict access to sensitive paths and parameters. The principle of least privilege should be enforced by ensuring that web server processes operate with minimal required permissions and that file system access is properly restricted. Regular security audits and vulnerability assessments should be conducted to identify similar issues in other components of the hosting infrastructure. Additionally, implementing proper logging and monitoring of file access patterns can help detect exploitation attempts and provide forensic evidence for incident response activities. The vulnerability serves as a reminder of the critical importance of input validation and the potential for seemingly minor flaws to create major security breaches in complex systems.