[DRE-maint] Bug#944849: ruby-rack-cors: CVE-2019-18978

[Salvatore Bonaccorso]

Source: ruby-rack-cors
Version: 1.0.2-1
Severity: grave
Tags: security upstream
Justification: user security hole

Hi,

The following vulnerability was published for ruby-rack-cors.

CVE-2019-18978[0]:
| An 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.


If you fix the vulnerability please also make sure to include the
CVE (Common Vulnerabilities & Exposures) id in your changelog entry.

For further information see:

[0] https://security-tracker.debian.org/tracker/CVE-2019-18978
    https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-18978
[1] https://github.com/cyu/rack-cors/commit/e4d4fc362a4315808927011cbe5afcfe5486f17d

Please adjust the affected versions in the BTS as needed.

Regards,
Salvatore