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How the CVE Works
The vulnerability is a logic flaw within CommandKit’s message command handler. When a user invokes a command using one of its aliases, the `ctx.commandName` property is incorrectly set to the alias string instead of the canonical command name. This incorrect value is propagated to both middleware functions and the command’s main execution context. Middleware performing security checks, such as verifying user permissions or applying rate limits based on ctx.commandName, will therefore use the alias for its logic. If the security logic only grants access for the canonical name, the check will fail, but the command will still execute because the alias was used, effectively bypassing the protection. Similarly, audit logging that relies on `ctx.commandName` will record the alias, making forensic analysis difficult. This flaw only affects text-based message commands, leaving slash and context menu commands unchanged.
Platform: CommandKit
Version: < v1.2.0-rc.12
Vulnerability: Logic Flaw
Severity: Medium
date: 2024-06-15
Prediction: Patch Available
What Undercode Say:
grep -r "ctx.commandName" /project/src/
// Insecure middleware example
myMiddleware(ctx) {
if (ctx.commandName === 'admin_clear') { // Bypassed if alias 'ac' is used
return checkAdmin(ctx.user.id);
}
}
// Secure workaround
myMiddleware(ctx) {
const canonicalName = ctx.command?.data?.command?.name;
if (canonicalName === 'admin_clear') {
return checkAdmin(ctx.user.id);
}
}
How Exploit:
An attacker discovers a command with a known alias that lacks the same permission checks as its canonical name. They invoke the command using the alias to bypass middleware restrictions, potentially executing unauthorized actions like administrative functions or elevated data access that would be blocked when using the main command name.
Protection from this CVE
Upgrade to v1.2.0-rc.12.
Use `ctx.command.data.command.name`.
Include all aliases in permission logic.
Impact
Unauthorized command execution.
Bypassed access controls.
Inaccurate audit logs.
🎯Let’s Practice Exploiting & Learn Patching For Free:
Sources:
Reported By: github.com
Extra Source Hub:
Undercode
