CVE-2018-8579 in Office
Summary
by MITRE
An information disclosure vulnerability exists when attaching files to Outlook messages, aka "Microsoft Outlook Information Disclosure Vulnerability." This affects Office 365 ProPlus, Microsoft Office. This CVE ID is unique from CVE-2018-8558.
Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.
Analysis
by VulDB Data Team • 06/06/2023
The CVE-2018-8579 vulnerability represents a critical information disclosure flaw within Microsoft Outlook that manifests when users attach files to email messages. This vulnerability specifically impacts Microsoft Office 365 ProPlus and various versions of Microsoft Office, creating a significant security risk for organizations that rely heavily on email communication. The flaw operates at the file attachment processing layer, where Outlook fails to properly validate or sanitize file metadata during the attachment process, potentially exposing sensitive information to unauthorized parties.
The technical mechanism behind this vulnerability involves the improper handling of file attachment metadata within Outlook's message composition interface. When users attach files to emails, the system processes various file attributes including file paths, timestamps, and other metadata that may contain sensitive system information. This flaw allows malicious actors to potentially extract information about the local file system, user environment, or other system details that should remain confidential during normal email operations. The vulnerability is categorized under CWE-200, which deals with improper information disclosure, making it a direct threat to data confidentiality and system integrity.
The operational impact of CVE-2018-8579 extends beyond simple information exposure, as it can serve as a reconnaissance vector for more sophisticated attacks. Attackers can leverage this vulnerability to gather intelligence about target systems, including file paths, user names, and potentially other system details that could aid in subsequent exploitation attempts. This information disclosure capability aligns with techniques described in the MITRE ATT&CK framework under the information gathering phase, where adversaries collect data about the target environment. Organizations using affected Office versions face risks of data leakage that could compromise business continuity, regulatory compliance, and overall security posture.
Mitigation strategies for this vulnerability require immediate patch management implementation through Microsoft's security updates, as well as enhanced email security controls. Organizations should implement strict file attachment policies that limit or restrict certain file types, particularly those that may contain metadata that could be exploited. Network monitoring solutions should be configured to detect anomalous attachment behaviors that might indicate exploitation attempts. Additionally, user education programs should emphasize the risks of opening suspicious attachments and the importance of verifying file sources before processing. The vulnerability demonstrates the critical importance of maintaining up-to-date security patches and implementing defense-in-depth strategies that protect against information disclosure threats. Organizations should also consider implementing email filtering solutions that can detect and block potentially malicious attachment patterns, reducing the attack surface and providing additional layers of protection against exploitation attempts.