USN-4571-1

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Source
https://ubuntu.com/security/notices/USN-4571-1
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-4571-1.json
JSON Data
https://api.osv.dev/v1/vulns/USN-4571-1
Upstream
Related
Published
2020-10-05T18:20:07.050724Z
Modified
2025-10-13T04:35:15Z
Summary
ruby-rack-cors vulnerability
Details

It was discovered that rack-cors did not properly handle relative file paths. An attacker could use this vulnerability to access arbitrary files.

References

Affected packages

Ubuntu:16.04:LTS / ruby-rack-cors

Package

Name
ruby-rack-cors
Purl
pkg:deb/ubuntu/ruby-rack-cors@0.4.0-1+deb9u2build0.16.04.1?arch=source&distro=xenial

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
0.4.0-1+deb9u2build0.16.04.1

Affected versions

0.*

0.4.0-1
0.4.0-1+deb9u1build0.16.04.1

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "ruby-rack-cors",
            "binary_version": "0.4.0-1+deb9u2build0.16.04.1"
        }
    ]
}

Database specific

cves_map

{
    "cves": [
        {
            "severity": [
                {
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
                    "type": "CVSS_V3"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ],
            "id": "CVE-2019-18978"
        }
    ],
    "ecosystem": "Ubuntu:16.04:LTS"
}