CVE-2003-0365 in ICQLite
Summary
by MITRE
ICQLite 2003a creates the ICQ Lite directory with an ACE for "Full Control" privileges for Interactive Users, which allows local users to gain privileges as other users by replacing the executables with malicious programs.
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Analysis
by VulDB Data Team • 06/14/2018
The vulnerability described in CVE-2003-0365 represents a critical privilege escalation flaw within ICQLite 2003a software, a popular instant messaging client developed by America Online. This vulnerability stems from improper access control mechanisms during the software installation process, specifically related to the directory permissions assigned to the ICQ Lite directory. The flaw manifests when the installation routine grants "Full Control" privileges to the Interactive Users group, which encompasses all users who can log into the system interactively. This misconfiguration creates a fundamental security weakness that directly violates the principle of least privilege, as outlined in the CWE-250 standard for improper privilege management.
The technical exploitation of this vulnerability occurs through a straightforward but dangerous method involving file replacement attacks. Local attackers can leverage their interactive user access to replace legitimate executable files within the ICQ Lite directory with malicious programs that carry the same filenames. Since the directory permissions grant full control to Interactive Users, the attacker can successfully overwrite the original executables without requiring elevated privileges. This technique effectively allows the malicious code to execute with the privileges of the user who originally installed the software, potentially escalating to system-level access if the target user has elevated permissions. The vulnerability operates under the ATT&CK framework category of privilege escalation through file permissions manipulation, specifically targeting the T1068 technique of exploit for privilege escalation.
The operational impact of this vulnerability extends beyond simple privilege escalation to encompass potential system compromise and data theft. An attacker with local access can effectively impersonate other users by substituting executables, potentially gaining access to sensitive communications, personal data, or even administrative credentials stored within the ICQ Lite application. The vulnerability affects any system where ICQLite 2003a is installed and where local users have the ability to modify files in the application directory. This presents a significant risk in multi-user environments where different users have varying levels of access and security requirements. The flaw demonstrates poor security hygiene in software development practices, particularly regarding the handling of file system permissions and access control lists during installation processes. The vulnerability has been classified as a local privilege escalation issue, with potential for lateral movement within a network if the compromised user account has access to other systems or resources.
Mitigation strategies for this vulnerability should focus on immediate remediation through proper system hardening and access control configuration. Organizations should ensure that all software installations properly configure directory permissions using the principle of least privilege, restricting write access to only necessary administrative users. The recommended approach involves implementing proper access control lists that prevent Interactive Users from having full control over application directories, while maintaining necessary read and execute permissions for legitimate software operation. System administrators should conduct regular audits of file permissions and directory access controls to identify and correct similar misconfigurations. Additionally, the vulnerability highlights the importance of secure software installation practices and the need for developers to follow security best practices during the software development lifecycle. The remediation process should include immediate patching of affected systems and implementation of proper access control policies that prevent unauthorized file modifications, aligning with both CWE-250 standards for privilege management and ATT&CK framework recommendations for preventing privilege escalation through file system manipulation.