CVE-2017-16761 in BuildMaster
Summary
by MITRE
An Open Redirect vulnerability in Inedo BuildMaster before 5.8.2 allows remote attackers to redirect users to arbitrary web sites.
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Analysis
by VulDB Data Team • 12/05/2019
The Open Redirect vulnerability identified as CVE-2017-16761 affects Inedo BuildMaster versions prior to 5.8.2, representing a critical security flaw that enables remote attackers to manipulate user navigation through malicious redirects. This vulnerability resides in the application's handling of URL parameters, specifically in the authentication and redirection mechanisms that are commonly used in enterprise DevOps platforms. The flaw allows adversaries to craft malicious URLs that, when clicked by unsuspecting users, will redirect them to attacker-controlled websites, potentially facilitating phishing attacks or malicious payload delivery.
The technical implementation of this vulnerability stems from insufficient validation of redirect URLs within the BuildMaster application's authentication flow. When users attempt to access protected resources or navigate through the application's interface, the system accepts user-supplied redirect parameters without proper sanitization or verification against a whitelist of approved domains. This creates an opportunity for attackers to inject malicious URLs that bypass normal security controls and redirect users to harmful destinations. The vulnerability aligns with CWE-601, which specifically addresses open redirect vulnerabilities where applications redirect users to untrusted websites, and represents a significant risk in enterprise environments where BuildMaster is used for continuous integration and deployment processes.
The operational impact of this vulnerability extends beyond simple redirection attacks, as it can be leveraged in sophisticated social engineering campaigns targeting enterprise users. Attackers can exploit this weakness by sending phishing emails or embedding malicious links in internal communications, potentially compromising user credentials or system access. In enterprise settings where BuildMaster is used for managing critical deployment workflows, such a vulnerability could enable attackers to redirect users away from legitimate deployment interfaces to malicious sites that appear to be legitimate administrative tools. This creates a pathway for credential theft, privilege escalation, or further network infiltration through the compromised user sessions.
Organizations utilizing Inedo BuildMaster should implement immediate mitigations including updating to version 5.8.2 or later, which contains the necessary patches to address the open redirect vulnerability. Network administrators should also consider implementing URL filtering and monitoring solutions that can detect and block suspicious redirect patterns in real-time. The mitigation strategy should align with ATT&CK technique T1566, which covers phishing and social engineering tactics that often leverage open redirect vulnerabilities. Additional protective measures include implementing strict input validation for all redirect parameters, maintaining comprehensive audit logs of redirect activities, and conducting regular security assessments to identify potential redirection paths that could be exploited by adversaries.