Attacker Impact
An attacker can exploit this vulnerability to execute arbitrary system commands with the privileges of the running electerm application [S1]. Since electerm is a terminal client often run with user or administrative privileges, successful exploitation could lead to complete system compromise, unauthorized data access, or malware installation [S3].
Root Cause
The vulnerability resides in the runLinux function within electerm [S1]. The application fails to properly sanitize or validate input parameters before passing them to a system shell execution function [S3]. This lack of input neutralization allows special characters or shell metacharacters to be injected, leading to arbitrary command execution (CWE-77) [S2].
Affected Versions
This vulnerability affects all versions of electerm prior to 3.3.8 [S1].
Concrete Fixes
To mitigate this vulnerability, users and developers should take the following actions:
- Upgrade electerm: Update the application to version 3.3.8 or later, where the input validation and command execution logic in the
runLinuxfunction have been secured [S1]. - Input Sanitization: Ensure that any input passed to shell execution functions is strictly validated against an allowlist of safe characters, or avoid shell execution entirely by using parameterized APIs [S2].
Detection Guidance
Security teams can identify potential exposure to this vulnerability by checking the installed version of electerm in their environment [S1]. Organizations should verify that all deployments of the application are updated to version 3.3.8 or later to ensure protection against this command injection vector [S2].