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.
Source: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-8324
Reference (s):
- https://hackerone.com/reports/328571
- MLIST:[debian-lts-announce] 20200816 [SECURITY] [DLA 2330-1] jruby security update
- URL: https://lists.debian.org/debian-lts-announce/2020/08/msg00027.html
- REDHAT:RHSA-2019:1972
- URL: https://access.redhat.com/errata/RHSA-2019:1972