CVE-2002-1210 in Eudora
Summary
by MITRE
Qualcomm Eudora 5.1.1, 5.2, and possibly other versions stores email attachments in a predictable location, which allows remote attackers to read arbitrary files via a link that loads an attachment with malicious script into a frame, which then executes the script in the local browser context.
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Analysis
by VulDB Data Team • 01/21/2019
The vulnerability identified as CVE-2002-1210 affects Qualcomm Eudora email clients version 5.1.1, 5.2, and potentially other iterations, presenting a significant security risk through improper handling of email attachments. This flaw stems from the predictable storage location mechanism used by the email client for processing attachments, which creates an exploitable condition that adversaries can leverage to execute malicious code within the local browser context. The vulnerability specifically manifests when users encounter email attachments that contain malicious scripts designed to exploit this predictable file storage behavior.
The technical implementation of this vulnerability operates through a sophisticated attack vector that combines predictable file placement with cross-site scripting exploitation techniques. When a user receives an email containing a malicious attachment, the email client stores this attachment in a known, predictable directory path. Attackers craft links that reference these predictable locations and embed malicious scripts within email frames. Upon user interaction with the email, the browser loads the attachment through these crafted links, executing the embedded script within the local security context of the browser. This execution occurs because the attachment storage mechanism does not properly isolate or secure the attachment files from unauthorized access, creating an environment where local file system access can be leveraged to execute arbitrary code.
The operational impact of this vulnerability extends beyond simple privilege escalation to encompass complete system compromise through browser-based attack vectors. The flaw allows remote attackers to bypass typical security boundaries that separate local file system access from browser execution contexts, effectively enabling arbitrary file reading capabilities. This vulnerability aligns with CWE-22 which describes improper limitation of a pathname to a restricted directory, commonly known as path traversal attacks. The attack model follows patterns consistent with the attack technique described in the MITRE ATT&CK framework under T1059.007 for command and scripting interpreter, where adversaries use local browser contexts to execute malicious code through crafted file references.
The exploitation of this vulnerability demonstrates a critical flaw in email client security architecture that fails to properly isolate attachment processing from local system resources. The predictable storage locations create a deterministic attack surface that allows adversaries to construct malicious payloads that can access and execute files from the local file system. This vulnerability represents a significant concern for organizations relying on email clients for communication, as it enables attackers to potentially access sensitive data, execute unauthorized commands, and compromise the integrity of email client environments. The attack requires minimal user interaction beyond opening the malicious email, making it particularly dangerous in targeted phishing campaigns.
Mitigation strategies for this vulnerability must address both the predictable storage behavior and the broader security architecture of email clients. Organizations should immediately update to patched versions of Eudora or migrate to more secure email client solutions that properly isolate attachment processing from local system resources. System administrators should implement network-level protections such as email content filtering that can detect and block suspicious attachment references, particularly those that attempt to reference predictable file paths. The solution must incorporate proper access controls and file system isolation mechanisms to prevent local file system traversal attacks, aligning with security best practices outlined in industry standards for secure email client implementations. Additionally, user education regarding suspicious email attachments and the importance of avoiding interaction with untrusted email content remains crucial in preventing successful exploitation of this vulnerability.