CVE-2019-16255

NameCVE-2019-16255
DescriptionRuby through 2.4.7, 2.5.x through 2.5.6, and 2.6.x through 2.6.4 allows code injection if the first argument (aka the "command" argument) to Shell#[] or Shell#test in lib/shell.rb is untrusted data. An attacker can exploit this to call an arbitrary Ruby method.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
ReferencesDLA-2007-1, DLA-2027-1, DLA-2330-1, DLA-3408-1, DSA-4586-1, DSA-4587-1, ELA-201-1
Debian Bugs972230

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
jruby (PTS)jessie, jessie (lts)1.5.6-9+deb8u2fixed
stretch (security), stretch (lts), stretch1.7.26-1+deb9u3fixed
buster (security), buster, buster (lts)9.1.17.0-3+deb10u1fixed
bookworm9.3.9.0+ds-8fixed
sid, trixie9.4.8.0+ds-1fixed
ruby2.1 (PTS)jessie, jessie (lts)2.1.5-2+deb8u14fixed
ruby2.3 (PTS)stretch (security)2.3.3-1+deb9u11fixed
stretch (lts), stretch2.3.3-1+deb9u12fixed
ruby2.5 (PTS)buster, buster (lts)2.5.5-3+deb10u7fixed
buster (security)2.5.5-3+deb10u6fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
jrubysourcewheezy(unfixed)end-of-life
jrubysourcejessie1.5.6-9+deb8u2DLA-2027-1
jrubysourcestretch1.7.26-1+deb9u2DLA-2330-1
jrubysourcebuster9.1.17.0-3+deb10u1DLA-3408-1
jrubysource(unstable)9.3.9.0+ds-1972230
ruby1.9.1sourcewheezy1.9.3.194-8.1+deb7u10ELA-201-1
ruby1.9.1source(unstable)(unfixed)
ruby2.1sourcewheezy(unfixed)end-of-life
ruby2.1sourcejessie2.1.5-2+deb8u8DLA-2007-1
ruby2.1source(unstable)(unfixed)
ruby2.3sourcestretch2.3.3-1+deb9u7DSA-4587-1
ruby2.3source(unstable)(unfixed)
ruby2.5sourcebuster2.5.5-3+deb10u1DSA-4586-1
ruby2.5source(unstable)2.5.7-1

Notes

https://www.ruby-lang.org/en/news/2019/10/01/code-injection-shell-test-cve-2019-16255/
ruby2.5: https://github.com/ruby/ruby/commit/3af01ae1101e0b8815ae5a106be64b0e82a58640

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