CVE-2005-0130 in Konversation
Summary
by MITRE
Certain Perl scripts in Konversation 0.15 allow remote attackers to execute arbitrary commands via shell metacharacters in (1) channel names or (2) song names that are not properly quoted when the user runs IRC sripts.
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Analysis
by VulDB Data Team • 06/07/2019
The vulnerability described in CVE-2005-0130 represents a critical command injection flaw within Konversation 0.15, a popular IRC client for the kde desktop environment. This security weakness stems from insufficient input validation and improper shell argument handling within the application's Perl script execution framework. The vulnerability specifically affects two distinct attack vectors involving channel names and song names that are processed through IRC scripts without adequate sanitization of shell metacharacters.
The technical exploitation occurs when Konversation processes user-provided data through Perl scripts that subsequently invoke shell commands. When users join channels or receive song information from IRC servers, the application fails to properly quote or escape special shell characters such as semicolons, ampersands, backticks, or pipe symbols. This improper handling creates an environment where maliciously crafted channel names or song titles can contain shell metacharacters that get interpreted and executed by the underlying shell when the IRC scripts are processed. The vulnerability falls under the CWE-78 category of improper neutralization of special elements used in an OS command, which is a well-documented and dangerous class of vulnerabilities in software systems.
The operational impact of this vulnerability is severe as it allows remote attackers to execute arbitrary commands on the victim's system with the privileges of the user running Konversation. An attacker could craft a malicious channel name containing shell commands that would be executed when the user attempts to join that channel or when the client processes song information from an IRC server. This command execution capability could enable attackers to install malware, exfiltrate data, modify system configurations, or perform other malicious activities without requiring any special privileges or local access to the target system. The vulnerability's remote nature makes it particularly dangerous as it can be exploited through normal IRC communication channels without requiring any special attack infrastructure.
Mitigation strategies for this vulnerability should focus on implementing proper input sanitization and shell argument escaping mechanisms within Konversation's Perl script processing framework. The recommended approach involves ensuring that all user-provided input data is properly quoted and escaped before being passed to shell commands, which aligns with the ATT&CK technique T1059.001 for command and script injection. System administrators should also consider implementing network-level restrictions to limit IRC traffic to trusted sources and ensure that Konversation is updated to versions that address this specific vulnerability. Additionally, users should be educated about the risks of joining untrusted IRC channels or accepting song information from unknown sources, as this vulnerability can be exploited through legitimate IRC communication protocols without any user interaction beyond normal client usage patterns.