Published: 14/11/2019 Updated: 21/05/2021

CVSS v2 Base Score: 5 | Impact Score: 2.9 | Exploitability Score: 10

CVSS v3 Base Score: 5.3 | Impact Score: 1.4 | Exploitability Score: 3.9

VMScore: 445

Vector: AV:N/AC:L/Au:N/C:P/I:N/A:N

An issue exists in the rack-cors (aka Rack CORS Middleware) gem prior to 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.

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rack-cors project rack-cors
debian debian linux 8.0
debian debian linux 9.0
debian debian linux 10.0
canonical ubuntu linux 16.04

Debian Bug report logs - #944849 ruby-rack-cors: CVE-2019-18978 Package: src:ruby-rack-cors; Maintainer for src:ruby-rack-cors is Debian Ruby Extras Maintainers <pkg-ruby-extras-maintainers@listsaliothdebianorg>; Reported by: Salvatore Bonaccorso <carnil@debianorg> Date: Sat, 16 Nov 2019 10:24:02 UTC Severity: gr ...

Improper pathname handling in ruby-rack-cors, a middleware that makes Rack-based apps CORS compatible, may result in access to private resources For the stable distribution (buster), this problem has been fixed in version 102-1+deb10u1 We recommend that you upgrade your ruby-rack-cors packages For the detailed security status of ruby-rack-cors ...

CWE-22 https://github.com/cyu/rack-cors/compare/v1.0.3...v1.0.4 https://github.com/cyu/rack-cors/commit/e4d4fc362a4315808927011cbe5afcfe5486f17d https://lists.debian.org/debian-lts-announce/2020/02/msg00004.html https://lists.debian.org/debian-lts-announce/2020/10/msg00000.html https://usn.ubuntu.com/4571-1/https://www.debian.org/security/2021/dsa-4918 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=944849 https://www.debian.org/security/2021/dsa-4918 https://nvd.nist.gov

CVE-2019-18978

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