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🛡️ Sentinel: [CRITICAL] Fix command injection in docker logs API#115

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🛡️ Sentinel: [CRITICAL] Fix command injection in docker logs API#115
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sentinel/fix-command-injection-docker-logs-17642776857423457004

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@bobdivx

@bobdivx bobdivx commented Jun 13, 2026

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🚨 Severity: CRITICAL
💡 Vulnerability: Command injection in src/pages/api/docker-logs.ts where user input was concatenated directly into a shell string executed via execSync.
🎯 Impact: Arbitrary command execution on the host system.
🔧 Fix: Replaced execSync with execFileAsync passing parameters securely as an array, validated user inputs, and added a journal entry.
✅ Verification: Ran pnpm run check and pnpm test to ensure no regressions.


PR created automatically by Jules for task 17642776857423457004 started by @bobdivx

🚨 Severity: CRITICAL
💡 Vulnerability: Command injection in `src/pages/api/docker-logs.ts` where user input was concatenated directly into a shell string executed via `execSync`.
🎯 Impact: Arbitrary command execution on the host system.
🔧 Fix: Replaced `execSync` with `execFileAsync` passing parameters securely as an array, validated user inputs, and added a journal entry.
✅ Verification: Ran `pnpm run check` and `pnpm test` to ensure no regressions.

Co-authored-by: bobdivx <6737167+bobdivx@users.noreply.github.com>
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Code Review

This pull request addresses a command injection vulnerability in the Docker logs API by replacing execSync with execFileAsync and introducing input validation for both containerId and tail. Feedback on the changes points out a regression where the string value 'all' is no longer supported for the --tail option, and suggests a fix to allow both 'all' and positive integers.

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Comment on lines +34 to +41
let tailCount = parseInt(tail, 10);
if (isNaN(tailCount) || tailCount < 1) {
tailCount = 100;
}

let logs: string[] = [];
try {
const output = execSync(command, { stdio: ['pipe', 'pipe', 'pipe'] }).toString();
logs = output.trim().split('\n');
const { stdout, stderr } = await execFileAsync('docker', ['logs', '--tail', tailCount.toString(), '--', containerId]);

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medium

The docker logs command supports both a numeric value and the string "all" for the --tail option. By parsing tail strictly as an integer, this change introduces a regression where passing tail=all is no longer supported and will silently default to 100.

We should allow both "all" and positive integers while still ensuring safe validation.

    let tailParam = '100';
    if (tail === 'all') {
        tailParam = 'all';
    } else {
        const tailCount = parseInt(tail, 10);
        if (!isNaN(tailCount) && tailCount >= 1) {
            tailParam = tailCount.toString();
        }
    }

    let logs: string[] = [];
    try {
        const { stdout, stderr } = await execFileAsync('docker', ['logs', '--tail', tailParam, '--', containerId]);

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