CVE-2007-3246 in IRC Services
Summary
by MITRE
The do_set_password function in modules/chanserv/set.c in IRC Services before 5.0.60 preserves channel founder privileges across a channel password change (ChanServ SET PASSWORD), which allows remote authenticated users to obtain the new password through automated e-mail, or perform privileged actions without knowing the new password.
VulDB is the best source for vulnerability data and more expert information about this specific topic.
Analysis
by VulDB Data Team • 07/20/2021
The vulnerability described in CVE-2007-3246 affects IRC Services versions prior to 5.0.60, specifically within the do_set_password function located in modules/chanserv/set.c. This flaw represents a critical privilege escalation issue that undermines the security model of channel management within IRC networks. The vulnerability occurs when administrators attempt to change channel passwords through the ChanServ SET PASSWORD command, creating a scenario where the channel founder maintains elevated privileges even after the password has been modified.
The technical implementation of this vulnerability stems from improper privilege handling during the password change process. When a channel founder executes a password change operation, the system fails to properly revoke or update the founder's access rights within the channel's permission structure. This design flaw creates a persistent access vector that allows authenticated users to maintain administrative capabilities despite the password modification. The vulnerability specifically impacts the channel's authentication mechanism by not properly synchronizing the founder's privilege state with the new password configuration.
From an operational perspective, this vulnerability enables attackers to exploit the channel founder's persistent privileges in multiple ways. Remote authenticated users can potentially obtain the new password through automated email mechanisms that may be configured to notify channel founders of password changes. More critically, the vulnerability allows attackers to perform privileged actions without possessing the knowledge of the new password, effectively bypassing the intended security controls. This creates a scenario where unauthorized individuals can maintain control over channels they should not have access to, potentially leading to unauthorized channel modifications, message flooding, or even channel takeovers.
The security implications of this vulnerability align with CWE-284, which addresses improper access control, and can be mapped to ATT&CK technique T1078.1.1 for valid accounts and T1566.001 for spearphishing attachments, as the vulnerability allows for unauthorized privilege escalation through legitimate authentication mechanisms. The flaw essentially creates a backdoor condition where legitimate channel founders can be exploited to maintain access beyond the intended scope of their privileges. Organizations using IRC Services should consider this vulnerability as part of their broader security posture assessment, particularly when implementing channel management protocols.
Mitigation strategies for this vulnerability require immediate patching of IRC Services to version 5.0.60 or later, which contains the necessary fixes to properly handle privilege revocation during password changes. Administrators should also implement additional monitoring of channel password change events and privilege modifications to detect anomalous behavior. The recommended approach includes verifying that channel founder privileges are properly revoked and re-established only when necessary, ensuring that all authentication mechanisms are properly synchronized. Organizations should conduct regular security audits of their IRC services configurations to prevent similar privilege escalation issues and implement proper access control policies that align with the principle of least privilege.