CVE-2015-6844 in SourceOne Email Supervisor
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in Reviewer in EMC SourceOne Email Supervisor before 7.2 allows remote attackers to inject arbitrary web script or HTML via unspecified vectors.
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Analysis
by VulDB Data Team • 06/22/2022
The CVE-2015-6844 vulnerability represents a critical cross-site scripting flaw within EMC SourceOne Email Supervisor's Reviewer component, specifically affecting versions prior to 7.2. This vulnerability falls under the CWE-79 category of Cross-Site Scripting, which is one of the most prevalent and dangerous web application security flaws. The issue stems from insufficient input validation and output encoding mechanisms within the email supervision interface, creating an exploitable condition where malicious actors can inject malicious scripts into the application's response. The vulnerability's impact is particularly concerning given that SourceOne Email Supervisor is designed for enterprise email management and archiving, making it a prime target for attackers seeking to compromise email infrastructure.
The technical exploitation of this vulnerability occurs through unspecified attack vectors that likely involve manipulation of email content or metadata fields processed by the Reviewer module. Attackers can craft malicious email messages or modify existing content in ways that bypass the application's security controls, allowing arbitrary web script or HTML code to be executed within the context of authenticated user sessions. This type of vulnerability enables attackers to perform session hijacking, steal sensitive information, or redirect users to malicious websites. The unspecified nature of the attack vectors suggests that multiple input points within the email processing pipeline may be susceptible to manipulation, including email headers, body content, or attachment metadata that the Reviewer component handles during email analysis and display operations.
The operational impact of CVE-2015-6844 extends beyond simple script injection, as it can lead to complete compromise of email supervision environments and potential lateral movement within enterprise networks. When exploited, this vulnerability allows attackers to execute malicious code in the browser context of legitimate users who interact with the SourceOne Email Supervisor interface. This capability enables sophisticated attacks such as credential theft, data exfiltration, and the deployment of additional malware payloads. The vulnerability is particularly dangerous in enterprise settings where email supervisors are used for monitoring and managing sensitive communications, as successful exploitation could provide attackers with access to confidential business information, intellectual property, and personal data. The attack surface is further expanded due to the nature of email systems, which typically require broad network access and often operate with elevated privileges.
Organizations affected by this vulnerability should implement immediate mitigations including applying the vendor-provided patches and updates to bring their SourceOne Email Supervisor installations to version 7.2 or later. Network segmentation and access controls should be strengthened around email supervision systems to limit exposure to untrusted network segments. Input validation controls should be enhanced at multiple layers including web application firewalls and application-level filtering to detect and block malicious payloads. Security monitoring should be implemented to detect anomalous behavior patterns that may indicate exploitation attempts. The vulnerability aligns with ATT&CK technique T1059.001 for Command and Scripting Interpreter and T1566.001 for Phishing, highlighting the potential for attackers to leverage this flaw for initial access and subsequent lateral movement within compromised environments. Regular security assessments and vulnerability scanning should be conducted to identify similar issues in other enterprise email systems and ensure comprehensive protection against similar cross-site scripting threats.