CVE-2011-5101 in SaaS Endpoint Protection
Summary
by MITRE
The Rumor technology in McAfee SaaS Endpoint Protection before 5.2.4 allows remote attackers to relay e-mail messages via unspecified vectors, as demonstrated by relaying spam.
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Analysis
by VulDB Data Team • 01/14/2018
The vulnerability identified as CVE-2011-5101 affects the Rumor technology component within McAfee SaaS Endpoint Protection software versions prior to 5.2.4. This represents a significant security flaw that enables remote attackers to exploit the email relay functionality in ways that were not intended by the software designers. The issue specifically impacts organizations relying on McAfee's cloud-based endpoint protection services, where the Rumor technology is designed to handle various email-related operations but fails to properly validate or control incoming relay requests.
The technical nature of this vulnerability stems from insufficient input validation and access control mechanisms within the Rumor technology module. Attackers can leverage unspecified vectors to manipulate the email relay process, effectively allowing them to forward or redirect email messages through the compromised system. This particular weakness creates a pathway for malicious actors to use the legitimate email infrastructure as a conduit for spam distribution, potentially overwhelming recipient mail systems and damaging the reputation of the compromised organization. The vulnerability's classification aligns with CWE-20, which addresses improper input validation, and represents a classic example of how insufficient security controls in email processing systems can be exploited for mass distribution attacks.
The operational impact of this vulnerability extends beyond simple spam relay capabilities, as it fundamentally undermines the trust model that email systems rely upon for security. Organizations using affected versions of McAfee SaaS Endpoint Protection face potential exposure to spam campaigns, phishing attempts, and other malicious email-based attacks that could be amplified through the compromised relay functionality. The attack surface is particularly concerning for enterprises that depend on email as a primary communication channel, as the vulnerability could enable attackers to bypass traditional email filtering mechanisms and deliver harmful content directly to target recipients. This weakness also creates potential for abuse in distributed denial-of-service scenarios where the compromised system serves as a relay point for amplifying attack traffic.
Security professionals should consider this vulnerability in the context of broader email security frameworks and the ATT&CK framework's email-related techniques. The ability to relay emails remotely represents a technique that could be categorized under email relay abuse patterns, where adversaries leverage compromised systems to forward malicious content. Organizations should implement immediate mitigation strategies including updating to McAfee SaaS Endpoint Protection version 5.2.4 or later, which contains the necessary patches to address the relay functionality issues. Additional defensive measures should include enhanced monitoring of email relay activities, implementation of stricter access controls for email processing components, and regular security assessments of cloud-based endpoint protection systems to identify similar vulnerabilities in other components of the security infrastructure.