CVE-2019-18978

NameCVE-2019-18978
DescriptionAn issue was discovered in the rack-cors (aka Rack CORS Middleware) gem before 1.0.4 for Ruby. It allows ../ directory traversal to access private resources because resource matching does not ensure that pathnames are in a canonical format.
SourceCVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
ReferencesDLA-2096-1, DLA-2389-1, DSA-4918-1
Debian Bugs944849

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
ruby-rack-cors (PTS)bookworm, bullseye1.1.1-1fixed
forky, sid, trixie2.0.2-1fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
ruby-rack-corssourcejessie0.2.9-1+deb8u1DLA-2096-1
ruby-rack-corssourcestretch0.4.0-1+deb9u2DLA-2389-1
ruby-rack-corssourcebuster1.0.2-1+deb10u1DSA-4918-1
ruby-rack-corssource(unstable)1.1.1-1944849

Notes

https://github.com/cyu/rack-cors/commit/e4d4fc362a4315808927011cbe5afcfe5486f17d
https://github.com/cyu/rack-cors/compare/v1.0.3...v1.0.4
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