CVE-2014-7275 in getmail
Summary
by MITRE
The POP3-over-SSL implementation in getmail 4.0.0 through 4.44.0 does not verify X.509 certificates from SSL servers, which allows man-in-the-middle attackers to spoof POP3 servers and obtain sensitive information via a crafted certificate.
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Analysis
by VulDB Data Team • 03/29/2022
The vulnerability described in CVE-2014-7275 represents a critical security flaw in the getmail email retrieval utility version 4.0.0 through 4.44.0. This issue specifically affects the POP3-over-SSL implementation where the software fails to properly validate X.509 certificates presented by SSL servers during the connection process. The absence of certificate verification creates a significant attack vector that undermines the fundamental security assurances provided by SSL/TLS protocols. When users configure getmail to retrieve emails via POP3-over-SSL, the application establishes encrypted connections to mail servers but does not authenticate the server's identity through proper certificate validation mechanisms.
The technical flaw stems from the implementation's failure to perform certificate chain validation and hostname verification as mandated by standard SSL/TLS security practices. This weakness allows malicious actors to perform man-in-the-middle attacks by presenting forged SSL certificates to unsuspecting getmail clients. The vulnerability operates at the application layer where the security controls should enforce certificate validation but instead accepts any certificate presented by the server. This failure directly relates to CWE-295 which addresses improper certificate validation and CWE-310 which covers cryptographic issues in certificate validation. The attack scenario involves an attacker positioned between the getmail client and legitimate mail server, capable of intercepting and modifying communications without detection.
The operational impact of this vulnerability extends beyond simple information disclosure to encompass complete compromise of email communication security. Attackers can successfully impersonate legitimate mail servers and gain access to sensitive email communications, credentials, and personal information transmitted through the compromised getmail configuration. This vulnerability particularly affects users who rely on getmail for automated email retrieval processes, as the compromised system can silently forward all retrieved emails to attacker-controlled servers. The implications are severe for organizations using getmail for email processing, as it undermines the confidentiality and integrity guarantees of encrypted email transport. According to ATT&CK framework, this vulnerability maps to technique T1566 which involves credential access through phishing and man-in-the-middle attacks, and T1041 which covers data compression and encryption for exfiltration purposes.
Mitigation strategies for CVE-2014-7275 require immediate software updates to versions that properly implement certificate validation, typically those released after the vulnerability disclosure. System administrators should ensure that all getmail installations are upgraded to patched versions that enforce proper X.509 certificate verification. Additional defensive measures include implementing network-level monitoring to detect unusual certificate behavior and establishing certificate pinning policies where appropriate. Organizations should also consider deploying network security controls such as SSL inspection appliances that can validate certificate chains at the network boundary. The vulnerability highlights the critical importance of certificate validation in secure communications and demonstrates how seemingly minor implementation flaws can create significant security risks. Regular security audits of email infrastructure and automated patch management systems should be implemented to prevent similar vulnerabilities from affecting other security-critical applications.