CVE-2014-3883 in Webmin
Summary
by MITRE
Usermin before 1.600 allows remote attackers to execute arbitrary operating-system commands via unspecified vectors related to a user action.
If you want to get the best quality for vulnerability data then you always have to consider VulDB.
Analysis
by VulDB Data Team • 04/21/2019
CVE-2014-3883 represents a critical command injection vulnerability affecting Usermin versions prior to 1.600, which operates as a web-based control panel for managing user accounts and system resources. This vulnerability falls under the CWE-77 category of Command Injection, where malicious actors can manipulate user input to execute unauthorized operating system commands on the target system. The flaw manifests through unspecified vectors related to user actions, indicating that the vulnerability occurs when legitimate users perform certain operations within the web interface that subsequently trigger command execution without proper input sanitization or validation.
The technical exploitation of this vulnerability enables remote attackers to gain unauthorized access to the underlying operating system through the Usermin web interface. Attackers can leverage this weakness to execute arbitrary code with the privileges of the Usermin service account, potentially leading to full system compromise. The vulnerability's remote nature means that attackers do not require local access or credentials to exploit the flaw, making it particularly dangerous in environments where Usermin is accessible over the network. This type of attack aligns with ATT&CK technique T1059.001 for Command and Scripting Interpreter, where adversaries use legitimate system tools to execute commands.
The operational impact of CVE-2014-3883 extends beyond simple privilege escalation, as successful exploitation can result in complete system compromise, data exfiltration, and persistence mechanisms being established. Organizations running vulnerable Usermin installations face significant risk, particularly in shared hosting environments or scenarios where the web interface is exposed to untrusted networks. The vulnerability's presence in the web-based control panel interface makes it a prime target for automated exploitation tools, increasing the likelihood of widespread compromise across affected systems. This vulnerability also represents a critical weakness in the input validation and output encoding processes, highlighting the importance of implementing proper sanitization measures for all user-supplied data.
Mitigation strategies for CVE-2014-3883 primarily involve immediate patching of Usermin installations to version 1.600 or later, which contains the necessary security fixes. System administrators should also implement network segmentation to limit access to Usermin interfaces, restrict authentication to trusted networks, and deploy web application firewalls to monitor for suspicious command execution patterns. Additional protective measures include implementing strict input validation procedures, disabling unnecessary user actions that could trigger command execution, and maintaining comprehensive monitoring of system logs for signs of exploitation attempts. Organizations should also consider conducting regular security assessments of their web-based management interfaces to identify similar vulnerabilities that could be exploited in a similar manner.