CVE-2017-8080 in Hipchat Server
Summary
by MITRE
Atlassian Hipchat Server before 2.2.4 allows remote authenticated users with user level privileges to execute arbitrary code via vectors involving image uploads.
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Analysis
by VulDB Data Team • 05/06/2017
The vulnerability identified as CVE-2017-8080 represents a critical remote code execution flaw in Atlassian Hipchat Server versions prior to 2.2.4. This security weakness specifically targets the image upload functionality within the platform, creating a pathway for authenticated users to escalate their privileges and execute malicious code on the affected server. The vulnerability stems from insufficient input validation and sanitization mechanisms within the image processing pipeline, allowing attackers to upload specially crafted files that can be subsequently processed to trigger arbitrary code execution. The flaw is particularly concerning because it requires only user-level authentication, making it accessible to individuals who have legitimate access to the Hipchat Server instance but do not possess administrative privileges. This creates a significant risk for organizations that rely on Hipchat for internal communications, as a compromised user account could potentially lead to full server compromise.
The technical implementation of this vulnerability involves the improper handling of image file uploads within the Hipchat Server application. When users upload images through the platform, the system processes these files without adequate validation of their content or structure. Attackers can exploit this by uploading malicious files that contain embedded payloads designed to execute code when the system processes the image data. The vulnerability is classified under CWE-434, which specifically addresses "Unrestricted Upload of File with Dangerous Type," and aligns with ATT&CK technique T1059.007 for "Command and Scripting Interpreter: JavaScript." The exploitation process typically involves crafting image files that contain malicious JavaScript or other executable code, which gets executed during the image processing phase. This type of vulnerability is particularly dangerous because it leverages legitimate application functionality to achieve unauthorized code execution, making detection more challenging for security monitoring systems.
The operational impact of CVE-2017-8080 extends beyond simple code execution, potentially enabling attackers to gain full control over the Hipchat Server infrastructure. Successful exploitation could allow threat actors to install backdoors, exfiltrate sensitive communication data, modify user permissions, or use the compromised server as a pivot point for attacking other systems within the network. Organizations using Hipchat Server may experience significant data breaches, as the platform often contains sensitive internal communications, user credentials, and business-critical information. The vulnerability's accessibility to authenticated users means that even a single compromised account could provide attackers with a foothold for broader network infiltration. Additionally, the attack surface is particularly wide given that Hipchat Server is commonly used in enterprise environments where multiple users maintain legitimate access to the platform, increasing the likelihood of successful exploitation.
Mitigation strategies for CVE-2017-8080 center on immediate patching of the Hipchat Server to version 2.2.4 or later, which addresses the underlying image upload validation issues. Organizations should implement additional defensive measures including strict file type validation, content scanning of uploaded files, and network segmentation to limit the potential impact of successful exploitation. Security teams should also consider implementing web application firewalls and monitoring for unusual file upload patterns that could indicate exploitation attempts. The vulnerability highlights the importance of proper input validation and the principle of least privilege, ensuring that even authenticated users cannot perform actions beyond their intended scope. Organizations should conduct comprehensive security assessments of their Hipchat Server configurations and review access controls to minimize potential attack vectors. Regular security updates and vulnerability management processes should be prioritized to prevent similar issues from occurring in other components of the communication infrastructure.