CVE-2019-5477
Published: August 31, 2023Last modified: August 31, 2023
Description
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.
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 9.8 |
| Attack Vector | NETWORK |
| Attack complexity | LOW |
| Privileges required | NONE |
| User interaction | NONE |
| Scope | UNCHANGED |
| Confidentiality | HIGH |
| Integrity impact | HIGH |
| Availability impact | HIGH |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
Status
| Product | Release | Package | Status |
|---|---|---|---|
| Alpaquita Linux | 23 LTS | ruby-nokogiri | Not affected (1.13.10-r0) |
| Stream | ruby-nokogiri | Not affected (1.15.3-r0) |
References
- https://github.com/sparklemotion/nokogiri/issues/1915
- https://github.com/tenderlove/rexical/blob/master/CHANGELOG.rdoc
- https://hackerone.com/reports/650835
- https://lists.debian.org/debian-lts-announce/2019/09/msg00027.html
- https://lists.debian.org/debian-lts-announce/2022/10/msg00018.html
- https://lists.debian.org/debian-lts-announce/2022/10/msg00019.html
- https://security.gentoo.org/glsa/202006-05
- https://usn.ubuntu.com/4175-1/