CVE-2012-4884 in Best Practical
Summary
by MITRE
Argument injection vulnerability in Request Tracker (RT) 3.8.x before 3.8.15 and 4.0.x before 4.0.8 allows remote attackers to create arbitrary files via unspecified vectors related to the GnuPG client.
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Analysis
by VulDB Data Team • 12/19/2021
The CVE-2012-4884 vulnerability represents a critical argument injection flaw within the Request Tracker (RT) ticketing system affecting versions 3.8.x prior to 3.8.15 and 4.0.x prior to 4.0.8. This vulnerability specifically targets the integration between RT and the GnuPG client, creating a dangerous attack surface where remote adversaries can manipulate command execution flows through improperly validated input parameters. The flaw stems from insufficient sanitization of user-supplied data when constructing command-line arguments for GnuPG operations, allowing attackers to inject malicious parameters that can result in arbitrary file creation on the target system. This type of vulnerability falls under the CWE-77 category of command injection, which is classified as a high-risk vulnerability in the Common Weakness Enumeration catalog due to its potential for privilege escalation and system compromise.
The technical exploitation of this vulnerability occurs when RT processes encrypted or signed messages through its GnuPG integration component. Attackers can craft specially formatted input that, when processed by the GnuPG client, results in unintended command execution with the privileges of the RT service account. The unspecified vectors mentioned in the description suggest that the attack surface includes various points where user input is passed to GnuPG without proper validation or escaping mechanisms. This typically manifests when RT handles incoming email messages that contain crafted attachments or signatures that, upon processing, trigger the vulnerable code path. The vulnerability's impact extends beyond simple file creation to potentially enable full system compromise if the RT service operates with elevated privileges, making it particularly dangerous in enterprise environments where ticketing systems often have broad access to organizational data and resources.
The operational impact of CVE-2012-4884 is severe and multifaceted, affecting organizations that rely on RT for their ticketing and incident management workflows. Remote attackers can leverage this vulnerability to establish persistent access points, create backdoors, or exfiltrate sensitive data through the arbitrary file creation capability. The vulnerability's remote nature means that attackers do not require physical access or network credentials to exploit it, making it particularly attractive for automated attacks. Organizations using RT in production environments face potential data breaches, system compromise, and regulatory compliance violations if this vulnerability remains unpatched. The attack vector through GnuPG integration is particularly concerning because many organizations use encrypted communication channels that rely on RT's GnuPG functionality, creating a scenario where attackers can exploit the vulnerability while maintaining plausible deniability through encrypted traffic. This vulnerability also aligns with several tactics described in the MITRE ATT&CK framework, specifically covering techniques related to command and control communications and privilege escalation through service exploitation.
Mitigation strategies for CVE-2012-4884 primarily focus on immediate patching of affected RT versions to the secure releases 3.8.15 and 4.0.8 respectively. Organizations should also implement network segmentation to limit access to RT systems and enforce strict input validation on all user-supplied data that might interact with external processes. Additional defensive measures include monitoring for unusual file creation patterns on RT servers, implementing network intrusion detection systems to identify suspicious command execution patterns, and conducting regular security audits of RT configurations. The vulnerability highlights the importance of proper input sanitization and parameter validation in applications that interface with external command-line tools, as demonstrated by the CWE-77 classification that emphasizes the need for secure coding practices when handling external process invocation. Organizations should also consider implementing application whitelisting policies to restrict which external tools can be invoked by RT processes, thereby reducing the attack surface even if similar vulnerabilities exist in other components of the system.