CVE-2019-5477
Nokogiri Command Injection Vulnerability
Also known as GHSA-cr5j-953j-xw5p
Published 7 y ago · modified 4 mo ago · JSON
Summary
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.
Exploit prediction (EPSS)
5.90% probability of exploitation in the next 30 days, higher than 93% of all scored CVEs.
CVSS scores
| Assigned by | Version | Score | Vector |
|---|---|---|---|
| NVD | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 7.5 | AV:N/AC:L/Au:N/C:P/I:P/A:P |
| GitHub | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| rubygems | nokogiri | <1.10.4 | 1.10.4 |
| rubygems | rexical | <1.0.7 | 1.0.7 |
Affected products
- n/a Nokogiri (ruby gem)
Classification
- Weakness
- CWE-78 Improper Neutralization of Special Elements used in an OS Command
References
- hackerone.com /reports/650835 · x_transferred
- github.com /tenderlove/rexical/blob/master/CHANGELOG.rdoc · x_transferred
- github.com /sparklemotion/nokogiri/issues/1915 · x_transferred
- lists.debian.org /debian-lts-announce/2019/09/msg00027.html · mailing-list, x_transferred
- usn.ubuntu.com /4175-1/ · vendor-advisory, x_transferred
- security.gentoo.org /glsa/202006-05 · vendor-advisory, x_transferred
- lists.debian.org /debian-lts-announce/2022/10/msg00018.html · mailing-list, x_transferred
- lists.debian.org /debian-lts-announce/2022/10/msg00019.html · mailing-list, x_transferred
- nvd.nist.gov /vuln/detail/CVE-2019-5477 · advisory
- github.com /sparklemotion/nokogiri/commit/5d30128343573a9428c86efc758ba2c66e9f12dc · web
- github.com /tenderlove/rexical/commit/a652474dbc66be350055db3e8f9b3a7b3fd75926 · web
- github.com /rubysec/ruby-advisory-db/blob/master/gems/nokogiri/CVE-2019-5477.yml · web
- github.com /rubysec/ruby-advisory-db/blob/master/gems/rexical/CVE-2019-5477.yml · web
- github.com /sparklemotion/nokogiri · package
- usn.ubuntu.com /4175-1 · web
Sources
- CVE List: CVE-2019-5477
- GitHub Advisory: GHSA-cr5j-953j-xw5p
- NVD: CVE-2019-5477
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