RubyGems version Ruby 2.2 series: 2.2.9 and earlier, Ruby 2.3 series: 2.3.6 and earlier, Ruby 2.4 series: 2.4.3 and earlier, Ruby 2.5 series: 2.5.0 and earlier, prior to trunk revision 62422 contains a Directory Traversal vulnerability in install_location function of package.rb that can result in path traversal when writing to a symlinked basedir outside of the root. This vulnerability appears to have been fixed in 2.7.6.
The product attempts to access a file based on the filename, but it does not properly prevent that filename from identifying a link or shortcut that resolves to an unintended resource.
| Link | Tags |
|---|---|
| https://www.debian.org/security/2018/dsa-4219 | vendor advisory |
| https://usn.ubuntu.com/3621-1/ | vendor advisory |
| https://access.redhat.com/errata/RHSA-2018:3729 | vendor advisory |
| https://access.redhat.com/errata/RHSA-2018:3730 | vendor advisory |
| https://access.redhat.com/errata/RHSA-2018:3731 | vendor advisory |
| https://github.com/rubygems/rubygems/commit/1b931fc03b819b9a0214be3eaca844ef534175e2 | third party advisory patch |
| https://lists.debian.org/debian-lts-announce/2018/08/msg00028.html | mailing list |
| https://www.debian.org/security/2018/dsa-4259 | vendor advisory |
| http://blog.rubygems.org/2018/02/15/2.7.6-released.html | vendor advisory |
| http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00036.html | vendor advisory |
| https://access.redhat.com/errata/RHSA-2019:2028 | vendor advisory |
| https://access.redhat.com/errata/RHSA-2020:0542 | vendor advisory |
| https://access.redhat.com/errata/RHSA-2020:0591 | vendor advisory |
| https://access.redhat.com/errata/RHSA-2020:0663 | vendor advisory |