CVE-2011-4919 in mpack
Summary
by MITRE
mpack 1.6 has information disclosure via eavesdropping on mails sent by other users
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Analysis
by VulDB Data Team • 02/23/2024
The vulnerability identified as CVE-2011-4919 affects mpack version 1.6, a utility commonly used for handling mail attachments in Unix-like systems. This issue represents a significant information disclosure weakness that arises from inadequate security measures during the processing of email communications. The flaw specifically manifests when mpack handles mail transmission and processing, creating opportunities for unauthorized access to sensitive data that should remain confidential between users.
The technical root cause of this vulnerability stems from mpack's failure to properly secure communications channels when processing email attachments and related metadata. When users send emails through systems utilizing mpack version 1.6, the utility does not adequately implement encryption or authentication mechanisms to protect the content being transmitted. This creates a scenario where network traffic can be intercepted and analyzed by malicious actors positioned within the communication path, allowing them to eavesdrop on the contents of emails and their associated attachments.
From an operational perspective, this vulnerability exposes organizations to serious risks including unauthorized access to sensitive business information, personal data, and confidential communications. The impact extends beyond simple data exposure as it can lead to broader security breaches when attackers leverage the disclosed information for further attacks. The vulnerability is particularly concerning in environments where mpack is used for processing legitimate email communications, as it can affect both internal and external correspondence without proper detection mechanisms.
The security implications of this vulnerability align with CWE-310, which addresses cryptographic weaknesses in information disclosure scenarios. This classification indicates that the flaw represents a fundamental breakdown in the system's ability to maintain confidentiality during data transmission processes. The attack vector described in the CVE suggests that adversaries can exploit this weakness through passive monitoring of network traffic, making it particularly dangerous as it requires no active engagement from the target system.
Organizations should implement multiple layers of mitigation to address this vulnerability effectively. Immediate remediation involves upgrading to a patched version of mpack that properly implements secure communication protocols and encryption mechanisms. Network administrators should also consider implementing additional monitoring solutions to detect unusual email processing patterns that might indicate exploitation attempts. The mitigation strategy should also include reviewing and strengthening overall email security policies, including mandatory encryption requirements for sensitive communications and regular security audits of email processing systems. Additionally, implementing network segmentation and access controls can help limit the potential impact of any successful exploitation attempts, while regular security training for personnel can help identify and prevent social engineering approaches that might complement this technical vulnerability.