CVE-2017-7357 in Server
Summary
by MITRE
Hipchat Server before 2.2.3 allows remote authenticated users with Server Administrator level privileges to execute arbitrary code by importing a file.
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Analysis
by VulDB Data Team • 04/15/2017
The vulnerability identified as CVE-2017-7357 affects Hipchat Server versions prior to 2.2.3 and represents a critical remote code execution flaw that can be exploited by authenticated users possessing Server Administrator privileges. This vulnerability falls under the category of insecure file handling and improper input validation, creating a dangerous attack vector that could lead to complete system compromise. The flaw specifically manifests when the system processes file imports, allowing maliciously crafted files to be executed within the context of the Hipchat Server application.
The technical implementation of this vulnerability stems from insufficient validation of imported files within the Hipchat Server's import functionality. When administrators import files through the web interface, the system fails to properly sanitize or validate the file content, particularly regarding file extensions, MIME types, and executable content. This weakness enables attackers with administrative credentials to upload malicious files that bypass normal security checks and execute arbitrary code on the server. The vulnerability is particularly concerning because it requires only administrative privileges, which are typically limited to trusted personnel, but still provides a path for privilege escalation and system compromise.
The operational impact of CVE-2017-7357 extends far beyond simple code execution, as it provides attackers with complete control over the Hipchat Server infrastructure. Once exploited, attackers can establish persistent backdoors, exfiltrate sensitive communication data, modify user permissions, and potentially use the compromised server as a launching point for attacks on other systems within the network. The vulnerability directly impacts the confidentiality, integrity, and availability of the communication platform, as attackers can manipulate chat logs, user accounts, and system configurations. This flaw aligns with CWE-22 (Improper Limitation of a Pathname to a Restricted Directory) and CWE-74 (Improper Neutralization of Special Elements in Output Used by a Downstream Component) categories, demonstrating how inadequate input validation can lead to severe security consequences.
Organizations affected by this vulnerability should immediately implement mitigation strategies including immediate patching to version 2.2.3 or later, which addresses the file import validation issues. Network segmentation and monitoring should be enhanced to detect suspicious file upload activities, while administrative privileges should be strictly controlled and monitored through proper access controls. The ATT&CK framework categorizes this vulnerability under T1059 (Command and Scripting Interpreter) and T1078 (Valid Accounts) as attackers would leverage administrative credentials to execute commands and maintain persistence. Additionally, organizations should conduct thorough security audits of their Hipchat Server installations, review access controls, and implement multi-factor authentication for administrative accounts to reduce the attack surface. The vulnerability also highlights the importance of secure file handling practices and proper input validation in web applications, serving as a reminder of the critical need for comprehensive security testing and validation of file processing functionalities in enterprise communication platforms.