CVE-2013-4584 in Perdition
Summary
by MITRE
Perdition before 2.2 may have weak security when handling outbound connections, caused by an error in the STARTTLS IMAP and POP server. ssl_outgoing_ciphers not being applied to STARTTLS connections
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Analysis
by VulDB Data Team • 02/20/2024
The vulnerability identified as CVE-2013-4584 affects Perdition mail proxy software versions prior to 2.2, specifically impacting the handling of outbound connections through the STARTTLS protocol implementation. This security flaw represents a critical weakness in the cryptographic protection mechanisms of the mail proxy server, where the ssl_outgoing_ciphers configuration parameter fails to be properly applied to STARTTLS connections. The issue stems from a fundamental design flaw in how Perdition processes secure communication channels, creating a potential attack vector that could compromise the confidentiality and integrity of email communications passing through the proxy. The vulnerability exposes the system to man-in-the-middle attacks and eavesdropping scenarios where attackers can potentially intercept or manipulate encrypted email traffic.
The technical root cause of this vulnerability lies in the improper implementation of the STARTTLS protocol within Perdition's outbound connection handling mechanism. When Perdition establishes secure connections to backend mail servers, the ssl_outgoing_ciphers configuration that should dictate the cryptographic parameters and cipher suites for these connections are not being utilized. This creates a scenario where the system defaults to less secure cipher suites or uses weak cryptographic configurations that may be susceptible to various cryptographic attacks. The flaw specifically affects IMAP and POP server implementations within the Perdition framework, making it particularly dangerous for organizations relying on these protocols for email access and retrieval.
The operational impact of CVE-2013-4584 extends beyond simple cryptographic weakness to encompass broader security implications for email infrastructure. Organizations using affected Perdition versions face potential exposure of sensitive email communications, including personal data, business correspondence, and potentially confidential information that should remain protected through secure channel establishment. The vulnerability could allow attackers to downgrade encryption levels, bypass security controls, or even obtain cleartext credentials and messages if the system fails to properly enforce the configured cipher specifications. This weakness particularly affects environments where Perdition acts as a gateway between internal networks and external mail servers, creating a potential breach point in the organization's email security architecture.
Security practitioners should recognize this vulnerability as a variant of CWE-327, which addresses the use of weak cryptographic algorithms and improper implementation of security protocols. The flaw also aligns with ATT&CK technique T1566, which involves the exploitation of vulnerabilities in email servers to gain unauthorized access to email communications. Organizations should immediately implement mitigation strategies including upgrading to Perdition version 2.2 or later, which properly implements the ssl_outgoing_ciphers configuration for STARTTLS connections. Additionally, administrators should verify that their current configuration files properly specify strong cipher suites and ensure that all outbound connections are appropriately secured. Network monitoring should be enhanced to detect potential attempts to exploit this vulnerability, and organizations should consider implementing additional security controls such as certificate pinning and strict TLS policy enforcement to further protect their email infrastructure.