| Name | 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. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DLA-1933-1, DLA-3149-1, DLA-3150-1 |
| Debian Bugs | 934802, 940905 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| rexical (PTS) | buster | 1.0.5-2 | vulnerable |
| buster (security) | 1.0.5-2+deb10u1 | fixed |
| bullseye | 1.0.7-1 | fixed |
| sid, trixie, bookworm | 1.0.7-2 | fixed |
| ruby-nokogiri (PTS) | buster | 1.10.0+dfsg1-2 | vulnerable |
| buster (security) | 1.10.0+dfsg1-2+deb10u1 | fixed |
| bullseye | 1.11.1+dfsg-2 | fixed |
| bookworm | 1.13.10+dfsg-2 | fixed |
| sid, trixie | 1.16.2+dfsg-1 | fixed |
The information below is based on the following data on fixed versions.
Notes
[stretch] - rexical <no-dsa> (Minor issue, can be fixed via point release)
[stretch] - ruby-nokogiri <no-dsa> (Minor issue, can be fixed via point release)
https://github.com/sparklemotion/nokogiri/issues/1915
Processes are vulnerable only if the undocumented method Nokogiri::CSS::Tokenizer#load_file
is being passed untrusted user input.
https://github.com/tenderlove/rexical/commit/a652474dbc66be350055db3e8f9b3a7b3fd75926
Change in rexical is covered by the scope of this CVE.
https://github.com/sparklemotion/nokogiri/commit/5fe449fd3ab8cc25a71499128529c821c10dde83?w=1 (v1.10.4)