A command injection vulnerability in Nokogiri v1.10.3 and earlier allows commands to be executed in a subprocess via Ruby's `Kernel.open` method. Processes are vulnerable only if the undocumented method `Nokogiri::CSS::Tokenizer#load_file` is being called with unsafe user input as the filename. This vulnerability appears in code generated by the Rexical gem versions v1.0.6 and earlier. Rexical is used by Nokogiri to generate lexical scanner code for parsing CSS queries. The underlying vulnerability was addressed in Rexical v1.0.7 and Nokogiri upgraded to this version of Rexical in Nokogiri v1.10.4.
The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.
| Link | Tags |
|---|---|
| https://hackerone.com/reports/650835 | permissions required |
| https://github.com/tenderlove/rexical/blob/master/CHANGELOG.rdoc | release notes |
| https://github.com/sparklemotion/nokogiri/issues/1915 | third party advisory patch |
| https://lists.debian.org/debian-lts-announce/2019/09/msg00027.html | third party advisory mailing list |
| https://usn.ubuntu.com/4175-1/ | third party advisory vendor advisory |
| https://security.gentoo.org/glsa/202006-05 | third party advisory vendor advisory |
| https://lists.debian.org/debian-lts-announce/2022/10/msg00018.html | third party advisory mailing list |
| https://lists.debian.org/debian-lts-announce/2022/10/msg00019.html | third party advisory mailing list |