CVE-2020-1737: A flaw was found in Ansible 2.7.17 and prior, 2.8.9 and prior, and 2.9.6 and prior when using the Extract-Zip function from the win_unzip mo

Affected versions

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

• redhat ansible enginebefore 2.7.17
• redhat ansible engine2.8.0 and later · before 2.8.9
• redhat ansible engine2.9.0 and later · before 2.9.6
• redhat ansible towerup to 3.3.4 inclusive
• redhat ansible tower3.4.0 and later · up to 3.4.5 inclusive
• redhat ansible tower3.5.0 and later · up to 3.5.5 inclusive
• redhat ansible tower3.6.0 and later · up to 3.6.3 inclusive

Versions reported by the vendor

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

• Red Hat Ansible

  • 2.7.17 and prior, 2.8.9 and prior, 2.9.6 and prior, fixed in 2.10affected

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

Other highest-scoring records for the same primary product.

• CVE-2021-20228A flaw was found in the Ansible Engine 2.9.18, where sensitive info is not masked by default and is not protected by the no_log feature when
  31Monitor
• CVE-2019-14846In Ansible, all Ansible Engine versions up to ansible-engine 2.8.5, ansible-engine 2.7.13, ansible-engine 2.6.19, were logging at the DEBUG
  31Monitor
• CVE-2018-16837Ansible "User" module leaks any data which is passed on as a parameter to ssh-keygen.
  31Monitor

Published before and after this one in the same product

• ← EarlierCVE-2019-14858Oct 14, 2019 · A vulnerability was found in Ansible engine 2.x up to 2.8 and Ansible tower 3.x up to 3.5.
  22Monitor
• ← EarlierCVE-2020-1734Mar 3, 2020 · A flaw was found in the pipe lookup plugin of ansible.
  29Monitor
• Later →CVE-2020-1753Mar 16, 2020 · A security flaw was found in Ansible Engine, all Ansible 2.7.x versions prior to 2.7.17, all Ansible 2.8.x versions prior to 2.8.11 and all
  22Monitor

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.