CVE-2005-0129 in Konversation
Summary
by MITRE
The Quick Buttons feature in Konversation 0.15 allows remote attackers to execute certain IRC commands via a channel name containing "%" variables, which are recursively expanded by the Server::parseWildcards function when the Part Button is selected.
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Analysis
by VulDB Data Team • 01/07/2025
The vulnerability described in CVE-2005-0129 represents a classic command injection flaw within the Konversation IRC client version 0.15. This issue specifically targets the Quick Buttons functionality, which provides users with convenient shortcuts for common IRC operations. The vulnerability arises from insufficient input validation and sanitization within the Server::parseWildcards function, which processes channel names containing special character sequences. When a user interacts with the Part Button in the Quick Buttons interface, the application recursively expands any "%" variables present in the channel name parameter, creating a dangerous execution path for remote attackers.
The technical exploitation of this vulnerability occurs through carefully crafted channel names that contain percent-encoded variables or wildcards. These variables are then processed by the Server::parseWildcards function without proper sanitization, allowing malicious input to be interpreted as actual IRC commands. The recursive expansion mechanism becomes the critical flaw, as it enables attackers to inject arbitrary commands that execute within the context of the IRC client. This type of vulnerability falls under the CWE-94 category of "Improper Control of Generation of Code" and specifically relates to CWE-77, "Improper Neutralization of Special Elements used in a Command ('Command Injection')", which is a fundamental weakness in application security that enables attackers to execute unintended commands.
From an operational perspective, this vulnerability presents a significant risk to IRC users who may unknowingly interact with malicious channel names or participate in compromised chat environments. The remote attack vector means that an attacker can exploit this vulnerability without requiring physical access to the target system, making it particularly dangerous in shared or public IRC networks. The impact extends beyond simple command execution, as successful exploitation could potentially lead to unauthorized access to IRC server connections, data exfiltration, or even compromise of the underlying system if the IRC client has elevated privileges. This vulnerability demonstrates the importance of proper input validation in client-side applications that handle user-provided data and execute commands based on that input.
The exploitation of this vulnerability aligns with several ATT&CK techniques including T1059.007 "Command and Scripting Interpreter: Python" and T1068 "Exploitation for Privilege Escalation" when considering the potential for command injection leading to broader system compromise. Organizations using Konversation or similar IRC clients should implement immediate mitigations including updating to patched versions of the software, implementing network-level filtering to prevent malicious channel names from reaching users, and educating users about the risks of interacting with untrusted channel names. The vulnerability also highlights the need for proper input sanitization and the principle of least privilege in application design, ensuring that user-provided data is never directly executed as commands without thorough validation and sanitization processes. Security teams should monitor for potential exploitation attempts and implement proper logging to detect suspicious command execution patterns in IRC client environments.