CVE-2019-5477
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.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
OS impact
SUSE Affected 1 release
| Version | Status | Fixed in |
|---|---|---|
| — | Affected | — |
Debian Fixed 5 releases
| Version | Status | Fixed in |
|---|---|---|
| trixie | Fixed | 1.0.7-1 |
| sid | Fixed | 1.0.7-1 |
| forky | Fixed | 1.0.7-1 |
| bullseye | Fixed | 1.0.7-1 |
| bookworm | Fixed | 1.0.7-1 |
References
- https://github.com/sparklemotion/nokogiri/issues/1915
- https://github.com/tenderlove/rexical/commit/a652474dbc66be350055db3e8f9b3a7b3fd75926
- https://www.suse.com/security/cve/CVE-2019-5477.html
- https://nvd.nist.gov/vuln/detail/CVE-2019-5477
- https://github.com/sparklemotion/nokogiri/commit/5d30128343573a9428c86efc758ba2c66e9f12dc
- https://hackerone.com/reports/650835
- https://github.com/rubysec/ruby-advisory-db/blob/master/gems/nokogiri/CVE-2019-5477.yml
- https://github.com/rubysec/ruby-advisory-db/blob/master/gems/rexical/CVE-2019-5477.yml
- https://github.com/sparklemotion/nokogiri
- https://github.com/tenderlove/rexical/blob/master/CHANGELOG.rdoc
- 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
- https://security-tracker.debian.org/tracker/CVE-2019-5477
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.