USN-9058-1

See a problem?
Please try reporting it to the source first.
Source
https://ubuntu.com/security/notices/USN-9058-1
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-9058-1.json
JSON Data
https://api.osv.dev/v1/vulns/USN-9058-1
Upstream
Related
Published
2026-11-11T18:33:04Z
Modified
2026-11-12T17:29:31Z
Summary
ruby-actionpack-page-caching vulnerability
Details

It was discovered that Action Pack Page Caching incorrectly handled certain request paths when writing cached pages. A remote attacker could possibly use this issue to write arbitrary files to the web server, and possibly execute arbitrary code.

References

Affected packages

Ubuntu:Pro:16.04:LTS / ruby-actionpack-page-caching

Package

Name
ruby-actionpack-page-caching
Purl
pkg:deb/ubuntu/ruby-actionpack-page-caching?arch=source&distro=esm-apps-legacy%2Fxenial

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
1.0.2-4ubuntu0.16.04.1~esm1

Affected versions

1.*
1.0.2-3
1.0.2-4

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "ruby-actionpack-page-caching",
            "binary_version": "1.0.2-4ubuntu0.16.04.1~esm1"
        }
    ]
}

Database specific

cves_map 
{
    "cves": [
        {
            "id": "CVE-2020-8159",
            "severity": [
                {
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
                    "type": "CVSS_V3"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ]
        }
    ],
    "ecosystem": "Ubuntu:Pro:16.04:LTS"
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-9058-1.json"

Ubuntu:Pro:18.04:LTS / ruby-actionpack-page-caching

Package

Name
ruby-actionpack-page-caching
Purl
pkg:deb/ubuntu/ruby-actionpack-page-caching?arch=source&distro=esm-apps%2Fbionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
1.0.2-4ubuntu0.18.04.1~esm1

Affected versions

1.*
1.0.2-4

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "ruby-actionpack-page-caching",
            "binary_version": "1.0.2-4ubuntu0.18.04.1~esm1"
        }
    ]
}

Database specific

cves_map 
{
    "cves": [
        {
            "id": "CVE-2020-8159",
            "severity": [
                {
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
                    "type": "CVSS_V3"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ]
        }
    ],
    "ecosystem": "Ubuntu:Pro:18.04:LTS"
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-9058-1.json"

Ubuntu:Pro:20.04:LTS / ruby-actionpack-page-caching

Package

Name
ruby-actionpack-page-caching
Purl
pkg:deb/ubuntu/ruby-actionpack-page-caching?arch=source&distro=esm-apps%2Ffocal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
1.1.0-1ubuntu0.1~esm1

Affected versions

1.*
1.1.0-1

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "ruby-actionpack-page-caching",
            "binary_version": "1.1.0-1ubuntu0.1~esm1"
        }
    ]
}

Database specific

cves_map 
{
    "cves": [
        {
            "id": "CVE-2020-8159",
            "severity": [
                {
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
                    "type": "CVSS_V3"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ]
        }
    ],
    "ecosystem": "Ubuntu:Pro:20.04:LTS"
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-9058-1.json"