A Directory Traversal issue was discovered in RubyGems 2.7.6 and later through 3.0.2. Before making new directories or touching files (which now include path-checking code for symlinks), it would delete the target destination. If that destination was hidden behind a symlink, a malicious gem could delete arbitrary files on the user's machine, presuming the attacker could guess at paths. Given how frequently gem is run as sudo, and how predictable paths are on modern systems (/tmp, /usr, etc.), this could likely lead to data loss or an unusable system.
Advisories
Source ID Title
Debian DLA Debian DLA DLA-1735-1 ruby2.1 security update
Debian DLA Debian DLA DLA-2330-1 jruby security update
Debian DSA Debian DSA DSA-4433-1 ruby2.3 security update
EUVD EUVD EUVD-2019-0506 A Directory Traversal issue was discovered in RubyGems 2.7.6 and later through 3.0.2. Before making new directories or touching files (which now include path-checking code for symlinks), it would delete the target destination. If that destination was hidden behind a symlink, a malicious gem could delete arbitrary files on the user's machine, presuming the attacker could guess at paths. Given how frequently gem is run as sudo, and how predictable paths are on modern systems (/tmp, /usr, etc.), this could likely lead to data loss or an unusable system.
Github GHSA Github GHSA GHSA-5x32-c9mf-49cc RubyGems Delete directory using symlink when decompressing tar
Ubuntu USN Ubuntu USN USN-3945-1 Ruby vulnerabilities
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

No history.

cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2024-08-04T21:17:31.038Z

Reserved: 2019-02-13T00:00:00

Link: CVE-2019-8320

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2019-06-06T15:29:01.420

Modified: 2024-11-21T04:49:41.117

Link: CVE-2019-8320

cve-icon Redhat

Severity : Moderate

Publid Date: 2019-03-05T00:00:00Z

Links: CVE-2019-8320 - Bugzilla

cve-icon OpenCVE Enrichment

No data.