The netaddr gem before 1.5.3 and 2.0.4 for Ruby has misconfigured file permissions, such that a gem install may result in 0777 permissions in the target filesystem.
github.com/dspinhirne/netaddr-rb
github.com/dspinhirne/netaddr-rb/commit/3aac46c00a36e71905eaa619cb94d45bff6e3b51
github.com/dspinhirne/netaddr-rb/commit/c7a7de39b7e1126aef11821f98970db18582948b
github.com/dspinhirne/netaddr-rb/issues/29
nvd.nist.gov/vuln/detail/CVE-2019-17383
rubygems.org/gems/netaddr/versions