Directory traversal vulnerability in actionpack/lib/action_dispatch/middleware/static.rb in Action Pack in Ruby on Rails 3.x before 3.2.20,

Affected versions

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

• opensuse opensuse12.3
• opensuse opensuse13.1
• opensuse opensuse13.2
• rubyonrails rails3.0.0
• rubyonrails rails3.0.1
• rubyonrails rails3.0.10
• rubyonrails rails3.0.11
• rubyonrails rails3.0.12
• rubyonrails rails3.0.13
• rubyonrails rails3.0.14
• rubyonrails rails3.0.16
• rubyonrails rails3.0.17
• rubyonrails rails3.0.18
• rubyonrails rails3.0.19
• rubyonrails rails3.0.2
• rubyonrails rails3.0.20
• rubyonrails rails3.0.3
• rubyonrails rails3.0.4
• rubyonrails rails3.0.5
• rubyonrails rails3.0.6

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-2019-5418There is a File Content Disclosure vulnerability in Action View <5.2.2.1, <5.1.6.2, <5.0.7.2, <4.2.11.1 and v3 where specially crafted accepKEV
  90Now
• CVE-2016-0752Directory traversal vulnerability in Action View in Ruby on Rails before 3.2.22.1, 4.0.x and 4.1.x before 4.1.14.1, 4.2.x before 4.2.5.1, anKEV
  89Now
• CVE-2019-5420A remote code execution vulnerability in development mode Rails <5.2.2.1, <6.0.0.beta3 can allow an attacker to guess the automatically gene
  66This week
• CVE-2020-8163The is a code injection vulnerability in versions of Rails prior to 5.0.1 that wouldallow an attacker who controlled the `locals` argument o
  60This week
• CVE-2013-0156active_support/core_ext/hash/conversions.rb in Ruby on Rails before 2.3.15, 3.0.x before 3.0.19, 3.1.x before 3.1.10, and 3.2.x before 3.2.1
  60This week
• CVE-2013-0333lib/active_support/json/backends/yaml.rb in Ruby on Rails 2.3.x before 2.3.16 and 3.0.x before 3.0.20 does not properly convert JSON data to
  59Plan

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.