CVE-2017-5234 in Insight Collector
Summary
by MITRE
Rapid7 Insight Collector installers prior to version 1.0.16 contain a DLL preloading vulnerability, wherein it is possible for the installer to load a malicious DLL located in the current working directory of the installer.
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Analysis
by VulDB Data Team • 09/03/2020
The vulnerability identified as CVE-2017-5234 represents a critical DLL preloading flaw within Rapid7 Insight Collector installers prior to version 1.0.16. This vulnerability stems from improper handling of dynamic link library loading sequences during the installation process, creating an exploitable condition where malicious actors can inject arbitrary code into the system. The flaw specifically affects the installer's ability to properly resolve library dependencies, allowing attackers to place malicious DLL files in the same directory as the installer executable, thereby enabling unauthorized code execution with the privileges of the installing user.
From a technical perspective, this vulnerability operates under the principles of DLL preloading attacks, which are categorized under CWE-426 as "Untrusted Search Path" and fall within the broader ATT&CK framework under technique T1059.001 for command and scripting interpreter. The installer process loads libraries from the current working directory before checking system directories, creating a window of opportunity for attackers to place malicious DLLs with names matching those expected by the legitimate installer. This behavior violates the principle of least privilege and demonstrates poor secure coding practices regarding library resolution mechanisms. The vulnerability is particularly dangerous because it can be exploited by attackers who gain access to the local system or can influence the installation environment through social engineering or other means.
The operational impact of this vulnerability extends beyond simple code execution, as it can enable attackers to establish persistent access, escalate privileges, or deploy additional malware components. When an unsuspecting user runs the vulnerable installer, the malicious DLL loads automatically, potentially executing malicious payloads that could include keyloggers, backdoor installation, or data exfiltration tools. The vulnerability affects not only the immediate installation process but also creates a potential attack vector for lateral movement within networks where the Insight Collector is deployed. Organizations using older versions of the software face significant risk, particularly in environments where users may not have administrative privileges, as the vulnerability can be exploited through various attack vectors including phishing emails or compromised removable media.
Mitigation strategies for CVE-2017-5234 require immediate patching of all affected Rapid7 Insight Collector installations to version 1.0.16 or later, which addresses the DLL preloading vulnerability through proper library resolution mechanisms. System administrators should implement strict access controls to prevent unauthorized modification of installation directories and ensure that only trusted users can execute installation processes. Additional protective measures include monitoring for suspicious DLL loading activities using process monitoring tools and implementing application whitelisting policies that restrict execution of unknown or untrusted binaries. The vulnerability also highlights the importance of secure coding practices and proper library dependency management, particularly in installer applications. Organizations should conduct regular vulnerability assessments to identify similar issues in other software components and establish robust patch management processes to ensure timely remediation of security flaws. Network segmentation and endpoint protection solutions can provide additional layers of defense against exploitation attempts, while security awareness training can help prevent social engineering attacks that might leverage this vulnerability.