The lazy_initialize function in lib/resolv.rb in Ruby through 2.4.3 uses Kernel#open, which might allow Command Injection attacks, as demonstrated by a Resolv::Hosts::new argument beginning with a | character, a different vulnerability than CVE-2017-17405. NOTE: situations with untrusted input may be highly unlikely.
The product constructs all or part of a command, data structure, or record using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify how it is parsed or interpreted when it is sent to a downstream component.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Ruby | Ruby-lang | 2.2 (including) | 2.2.8 (including) |
| Ruby | Ruby-lang | 2.3 (including) | 2.3.5 (including) |
| Ruby | Ruby-lang | 2.4 (including) | 2.4.2 (including) |
| Ruby | Ruby-lang | 2.5.0-preview1 (including) | 2.5.0-preview1 (including) |