CVE-2001-0274 in Kicq
Summary
by MITRE
kicq IRC client 1.0.0, and possibly later versions, allows remote attackers to execute arbitrary commands via shell metacharacters in a URL.
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Analysis
by VulDB Data Team • 01/19/2025
The vulnerability identified as CVE-2001-0274 affects kicq IRC client version 1.0.0 and potentially subsequent releases, presenting a critical security flaw that enables remote attackers to execute arbitrary commands on affected systems. This vulnerability resides in the client's handling of URL data within IRC communications, specifically when processing shell metacharacters embedded within URL strings. The flaw represents a classic command injection vulnerability that exploits improper input validation and sanitization mechanisms within the application's network processing pipeline.
The technical implementation of this vulnerability stems from the kicq client's failure to properly sanitize URL data before processing or displaying it within shell contexts. When users receive IRC messages containing URLs with malicious shell metacharacters such as semicolons, ampersands, or backticks, the client may inadvertently pass this data to underlying shell commands without adequate filtering or escaping. This behavior aligns with CWE-78, which describes improper neutralization of special elements used in OS commands, making it a direct instance of shell injection vulnerability. The vulnerability operates at the application layer where user-provided data enters the system through legitimate IRC communication channels, creating an attack vector that requires no authentication or privileged access.
The operational impact of this vulnerability extends beyond simple command execution, as it can enable attackers to gain full control over affected systems. Remote adversaries can leverage this flaw to execute arbitrary code with the privileges of the user running the kicq client, potentially leading to complete system compromise. Attackers might use this vulnerability to install backdoors, exfiltrate data, or establish persistent access to compromised systems. The vulnerability affects any system running kicq client versions 1.0.0 or later, making it particularly concerning given the widespread use of IRC clients in various network environments. The attack surface is broad as it can be triggered through simple IRC message exchanges, requiring minimal interaction from victims beyond normal client usage.
Mitigation strategies for CVE-2001-0274 should focus on immediate patching of affected kicq versions, as the vulnerability represents a fundamental flaw in input handling that cannot be adequately addressed through configuration changes alone. Organizations should implement network-level restrictions to prevent IRC traffic from untrusted sources and consider deploying intrusion detection systems to monitor for suspicious URL patterns within IRC communications. The vulnerability's classification under ATT&CK technique T1059.007, which covers command and scripting interpreter execution, underscores the need for comprehensive monitoring of shell command invocations. Additionally, users should be educated about the risks of clicking on untrusted URLs within IRC communications, and administrators should consider implementing application whitelisting policies that restrict the execution of shell commands from IRC client contexts. The remediation process should also include thorough auditing of system logs for evidence of exploitation attempts and implementation of proper input validation mechanisms to prevent similar vulnerabilities in other applications.