Directory traversal vulnerability in the template function in function.inc in Accellion File Transfer Appliance devices before FTA_9_11_210

Affected versions

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

• accellion file transfer applianceup to fta_9_11_200 inclusive

Other highest-scoring records for the same primary product.

• CVE-2015-2857Accellion File Transfer Appliance before FTA_9_11_210 allows remote attackers to execute arbitrary code via shell metacharacters in the oaut
  64This week
• CVE-2017-8303An issue was discovered on Accellion FTA devices before FTA_9_12_180.
  46Plan
• CVE-2017-8794An issue was discovered on Accellion FTA devices before FTA_9_12_180.
  41Plan
• CVE-2019-5623Accellion File Transfer Appliance Improper Neutralization of Special Elements used in a Command ('Command Injection')
  39Monitor
• CVE-2019-5622Accellion File Transfer Appliance Use of Hard-coded Credentials
  39Monitor
• CVE-2017-8796An issue was discovered on Accellion FTA devices before FTA_9_12_180.
  39Monitor

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.