Uploading workflows to KNIME Server may override arbitrary file system contents

Affected versions

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

• knime knime server4.3.0 and later · before 4.13.6
• knime knime server4.14.0 and later · before 4.14.3
• knime knime server4.15.0 and later · before 4.15.3

Versions reported by the vendor

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

• KNIME KNIME Server

  • 4.15.0 and later · before 4.15.3affected · semver
  • 4.14.0 and later · before 4.14.3affected · semver
  • 4.3.0 and later · before 4.13.6affected · semver

Other highest-scoring records for the same primary product.

• CVE-2021-44725KNIME Server before 4.13.4 allows directory traversal in a request for a client profile.
  30Monitor
• CVE-2021-44726KNIME Server before 4.13.4 allows XSS via the old WebPortal login page.
  24Monitor
• CVE-2021-45097KNIME Server before 4.12.6 and 4.13.x before 4.13.4 (when installed in unattended mode) keeps the administrator's password in a file without
  22Monitor

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.