CVE-2019-8324

Description

An issue was discovered in RubyGems 2.6 and later through 3.0.2. A crafted gem with a multi-line name is not handled correctly. Therefore, an attacker could inject arbitrary code to the stub line of gemspec, which is eval-ed by code in ensure_loadable_spec during the preinstall check.

CVSS Metrics

• v3.1•HIGH•Score: 8.8CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
• v2.0•MEDIUM•Score: 6.8AV:N/AC:M/Au:N/C:P/I:P/A:P

EPSS Trends

Current EPSS score: 0.50%• Percentile: 66%

Techniques & Countermeasures

• CWE-94•Improper Control of Generation of Code ('Code Injection')

  The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment.

Affected Systems

• debian•debian_linux

  9.0

• opensuse•leap

  15.0 | 15.1

• redhat•enterprise_linux

  8.0

• rubygems•rubygems

  ≥ 2.6.0, ≤ 3.0.2

References (4)

• https://hackerone.com/reports/328571
• http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00036.html
• https://access.redhat.com/errata/RHSA-2019:1972
• https://lists.debian.org/debian-lts-announce/2020/08/msg00027.html