CVE-2019-8320

Public on 2019-08-07
Modified on 2019-08-12
Description
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.
Severity
Medium
CVSS v3 Base Score
7.4
See breakdown

Affected Packages

Platform Package Release Date Advisory
Amazon Linux 1 ruby20 2019-08-07 22:58 ALAS-2019-1255
Amazon Linux 1 ruby21 2019-08-07 22:58 ALAS-2019-1255
Amazon Linux 1 ruby24 2019-08-07 22:58 ALAS-2019-1255

CVSS Scores

Score Type Score Vector
Amazon Linux CVSSv3 7.4 CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:H
NVD CVSSv2 8.8 AV:N/AC:M/Au:N/C:N/I:C/A:C
NVD CVSSv3 7.4 CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:H