CVE-2007-1406 in Trac
Summary
by MITRE
Trac before 0.10.3.1 does not send a Content-Disposition HTTP header specifying an attachment in certain "unsafe" situations, which has unknown impact and remote attack vectors.
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Analysis
by VulDB Data Team • 08/26/2018
The vulnerability identified as CVE-2007-1406 affects Trac versions prior to 0.10.3.1 and relates to the improper handling of HTTP headers during file attachment processing. This weakness exists in the web application's response to specific user interactions that involve downloading or serving attachments, where the application fails to include the Content-Disposition header in certain scenarios. The Content-Disposition header serves a critical role in web security by explicitly instructing browsers on how to handle content, particularly when it comes to file downloads and attachment processing. Without this header, browsers may interpret the content differently, potentially leading to unintended execution contexts or security implications during attachment handling.
The technical flaw stems from Trac's failure to consistently implement proper HTTP response headers when serving file attachments. This issue manifests in what the description terms as "unsafe" situations, which typically involve specific combinations of user requests, attachment types, or server configurations that trigger the vulnerable code path. The vulnerability classification aligns with CWE-693, which addresses protection mechanism failures in web applications, and represents a specific instance of inadequate input validation and output handling. When the Content-Disposition header is omitted, the application cannot properly signal to the user agent that the content should be treated as an attachment, potentially leading to content being rendered inline rather than downloaded, or worse, executing in unexpected contexts.
The operational impact of this vulnerability remains difficult to quantify due to the unspecified nature of the "unknown impact and remote attack vectors" mentioned in the description. However, such deficiencies in HTTP header management can enable various attack vectors including but not limited to cross-site scripting attacks, content injection scenarios, or browser-based exploitation techniques. The vulnerability creates potential opportunities for attackers to manipulate how browsers process file attachments, which could lead to unauthorized code execution or data exposure. From an ATT&CK perspective, this weakness could be leveraged as part of a broader attack chain involving initial access through web application exploitation or privilege escalation through improper content handling mechanisms.
The security implications extend beyond simple header omission since proper Content-Disposition header implementation serves as a fundamental defense against several attack patterns. When attackers can manipulate how content is delivered to browsers, they may exploit the resulting behavior to bypass security controls or create unexpected execution contexts. This vulnerability demonstrates the importance of consistent and secure HTTP response handling in web applications, particularly those that process user-generated content or file attachments. Organizations using vulnerable Trac versions should prioritize immediate patching to address this deficiency, as the lack of proper Content-Disposition headers creates an attack surface that could be exploited to compromise user sessions or access sensitive data through manipulated attachment handling scenarios.