Directory traversal vulnerability in the web interface on D-Link DWR-116 through 1.06, DIR-140L through 1.02, DIR-640L through 1.02, DWR-512

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

• dlink dir-140l firmwareup to 1.02 inclusive
• dlink dir-640l firmwareup to 1.02 inclusive
• dlink dwr-111 firmwareup to 1.01 inclusive
• dlink dwr-116 firmwareup to 1.06 inclusive
• dlink dwr-512 firmwareup to 2.02 inclusive
• dlink dwr-712 firmwareup to 2.02 inclusive
• dlink dwr-912 firmwareup to 2.02 inclusive
• dlink dwr-921 firmwareup to 2.02 inclusive

Other highest-scoring records for the same primary product.

• CVE-2018-10823An issue was discovered on D-Link DWR-116 through 1.06, DWR-512 through 2.02, DWR-712 through 2.02, DWR-912 through 2.02, DWR-921 through 2.
  58Plan
• CVE-2018-10824An issue was discovered on D-Link DWR-116 through 1.06, DIR-140L through 1.02, DIR-640L through 1.02, DWR-512 through 2.02, DWR-712 through
  43Plan
• CVE-2017-6190Directory traversal vulnerability in the web interface on the D-Link DWR-116 device with firmware before V1.05b09 allows remote attackers to
  36Monitor

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Root cause

A user-supplied file name is joined with the allowed directory, but the result is never checked to confirm it is still inside that directory.

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

1const file = path.join(ROOT, req.query.name);2res.sendFile(file);

1const file = path.resolve(ROOT, req.query.name);2if (!file.startsWith(ROOT + path.sep)) {3  return res.sendStatus(400);4}5res.sendFile(file);

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.