CVE-2003-0256 in Kopete
Summary
by MITRE
The GnuPG plugin in kopete before 0.6.2 does not properly cleanse the command line when executing gpg, which allows remote attackers to execute arbitrary commands.
Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.
Analysis
by VulDB Data Team • 04/23/2019
The vulnerability described in CVE-2003-0256 represents a critical command injection flaw within the Kopete instant messaging client's integration with GNU Privacy Guard. This issue affects versions prior to 062 and stems from inadequate input sanitization in the GnuPG plugin component. The vulnerability specifically manifests when Kopete processes command line arguments for GPG execution, failing to properly cleanse or validate user-supplied data that gets incorporated into system commands. This fundamental security gap creates an environment where malicious actors can exploit the application's trust in its own command execution mechanisms.
The technical exploitation of this vulnerability occurs through the manipulation of command line parameters that are passed to the GPG executable. When Kopete processes encrypted messages or handles GPG-related operations, it constructs command line arguments that include user-provided data without proper sanitization. Attackers can craft specially formatted messages or data inputs that, when processed by the vulnerable plugin, result in arbitrary command execution on the target system. This flaw operates at the intersection of improper input validation and unsafe command construction, creating a pathway for remote code execution that bypasses normal application security boundaries.
The operational impact of this vulnerability extends beyond simple command execution to encompass full system compromise potential. Remote attackers who can influence the data flow to the affected plugin can execute any command available to the user account running Kopete, potentially leading to privilege escalation, data exfiltration, or further network penetration. The vulnerability's remote exploitability means that attackers do not need local access to the system, making it particularly dangerous in environments where instant messaging clients are used for business communications. This type of vulnerability aligns with CWE-78, which specifically addresses improper neutralization of special elements used in OS commands, and demonstrates how seemingly benign plugin integrations can introduce critical attack vectors.
Mitigation strategies for this vulnerability require immediate patching of the affected Kopete versions to 062 or later, which includes proper command line argument sanitization. System administrators should also implement network-level restrictions to prevent unnecessary exposure of instant messaging clients to untrusted networks. Additional protective measures include running Kopete with minimal privileges, implementing network segmentation, and monitoring for unusual command execution patterns. The vulnerability highlights the importance of secure coding practices in plugin development and demonstrates the necessity of input validation at all levels of application processing. Organizations should also consider implementing application whitelisting policies to restrict which commands can be executed through messaging clients and related applications. This vulnerability serves as a reminder of the critical importance of proper input sanitization in security-sensitive applications and the potential consequences of failing to address command injection vulnerabilities in integrated systems.