CVE-2012-6579 in Request Tracker
Summary
by MITRE
Best Practical Solutions RT 3.8.x before 3.8.15 and 4.0.x before 4.0.8, when GnuPG is enabled, allows remote attackers to configure encryption or signing for certain outbound e-mail, and possibly cause a denial of service (loss of e-mail readability), via an e-mail message to a queue s address.
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Analysis
by VulDB Data Team • 01/04/2022
The vulnerability identified as CVE-2012-6579 affects Best Practical Solutions RT versions 3.8.x prior to 3.8.15 and 4.0.x prior to 4.0.8 when GnuPG encryption functionality is enabled. This issue represents a significant security flaw in the email handling mechanisms of the RT ticketing system, which is widely used for issue tracking and management in enterprise environments. The vulnerability specifically targets the configuration of encryption and signing parameters for outbound email communications, creating potential attack vectors that could compromise the integrity and confidentiality of email communications within organizations relying on this system.
The technical flaw stems from inadequate input validation and configuration handling within the RT system's GnuPG integration module. When GnuPG is enabled, the system processes email messages destined for queue addresses with insufficient sanitization of encryption and signing parameters. This weakness allows remote attackers to manipulate the email queue processing logic to configure arbitrary encryption or signing settings for outbound messages. The vulnerability essentially permits an attacker to inject malicious configuration parameters that can alter how emails are encrypted or signed, potentially leading to unauthorized access to sensitive information or complete disruption of email communication channels.
The operational impact of this vulnerability extends beyond simple data exposure, as it can result in significant service degradation and potential information disclosure. Attackers could configure encryption settings that render legitimate emails unreadable or cause the system to lose the ability to properly decrypt messages, effectively creating a denial of service condition for email communications. This scenario would particularly impact organizations that rely heavily on encrypted email communications for sensitive data handling, such as financial institutions, healthcare providers, or government agencies. The vulnerability could also enable attackers to intercept and manipulate email content by configuring inappropriate signing or encryption parameters, potentially leading to man-in-the-middle attacks or unauthorized data access.
Organizations affected by this vulnerability should immediately implement the available patches from Best Practical Solutions, specifically upgrading to RT 3.8.15 or 4.0.8, which contain the necessary fixes for the GnuPG configuration handling. System administrators should also conduct thorough security assessments of their email configurations to identify any improperly configured GnuPG settings that might have been exploited. Additional mitigations include implementing strict access controls for email queue management, monitoring email processing logs for unusual encryption or signing parameter changes, and establishing network-level controls to restrict access to email queue addresses. This vulnerability aligns with CWE-20, "Improper Input Validation," and could be leveraged by threat actors following ATT&CK tactics including T1566 for initial access and T1499 for denial of service effects. Organizations should also consider implementing email encryption key management best practices and regular security audits to prevent similar vulnerabilities in their email infrastructure.