A path traversal vulnerability has been discovered in podman before version 1.4.0 in the way it handles symlinks inside containers.

Affected versions

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

• libpod project libpodbefore 1.4.0
• opensuse leap15.1

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.

• Podman podman

  • fixed in 1.4.0affected

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-2018-10856It has been discovered that podman before version 0.6.1 does not drop capabilities when executing a container as a non-root user.
  35Monitor
• CVE-2020-1726A flaw was discovered in Podman where it incorrectly allows containers when created to overwrite existing files in volumes, even if they are
  24Monitor
• CVE-2019-18466An issue was discovered in Podman in libpod before 1.6.0.
  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.