Aquaforest TIFF Server default configuration allows access to arbitrary files

Affected versions

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

• aquaforest tiff server4.2.210913

Versions reported by the vendor

Affected version ranges reported by the assigning authority (cisa-cg). Independent of NVD's CPE analysis and usually ahead of it.

• Aquaforest TIFF Server

  • up to and including 4.2.210913affected

Other highest-scoring records for the same primary product.

• CVE-2020-9325Aquaforest TIFF Server 4.0 allows Unauthenticated Arbitrary File Download.
  31Monitor
• CVE-2020-9324Aquaforest TIFF Server 4.0 allows Unauthenticated SMB Hash Capture via UNC.
  30Monitor
• CVE-2020-9323Aquaforest TIFF Server 4.0 allows Unauthenticated File and Directory Enumeration via tiffserver/tssp.aspx.
  21Monitor

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.