RubySec

Providing security resources for the Ruby community

CVE-2019-3881 (bundler): Insecure path handling in Bundler

ADVISORIES

GEM

bundler

SEVERITY

CVSS v3: 7.0

UNAFFECTED VERSIONS

  • < 1.14.0

PATCHED VERSIONS

  • >= 2.1.0

DESCRIPTION

Bundler prior to 2.1.0 uses a predictable path in /tmp/, created with insecure permissions as a storage location for gems, if locations under the user’s home directory are not available. If Bundler is used in a scenario where the user does not have a writable home directory, an attacker could place malicious code in this directory that would be later loaded and executed.