UBUNTU-CVE-2021-31810

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Source
https://ubuntu.com/security/notices/UBUNTU-CVE-2021-31810
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-31810.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2021-31810
Related
Published
2021-07-13T13:15:00Z
Modified
2021-07-13T13:15:00Z
Severity
  • 5.8 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N CVSS Calculator
Summary
[none]
Details

An issue was discovered in Ruby through 2.6.7, 2.7.x through 2.7.3, and 3.x through 3.0.1. A malicious FTP server can use the PASV response to trick Net::FTP into connecting back to a given IP address and port. This potentially makes curl extract information about services that are otherwise private and not disclosed (e.g., the attacker can conduct port scans and service banner extractions).

References

Affected packages

Ubuntu:Pro:16.04:LTS / ruby2.3

Package

Name
ruby2.3
Purl
pkg:deb/ubuntu/ruby2.3@2.3.1-2~ubuntu16.04.16+esm1?arch=src?distro=esm-infra/xenial

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2.3.1-2~ubuntu16.04.16+esm1

Affected versions

2.*

2.3.0-1
2.3.0-2
2.3.0-4ubuntu2
2.3.0-4ubuntu3
2.3.0-5ubuntu1
2.3.1-2~16.04
2.3.1-2~16.04.2
2.3.1-2~16.04.4
2.3.1-2~16.04.5
2.3.1-2~16.04.6
2.3.1-2~16.04.7
2.3.1-2~16.04.9
2.3.1-2~16.04.10
2.3.1-2~16.04.11
2.3.1-2~16.04.12
2.3.1-2~ubuntu16.04.13
2.3.1-2~ubuntu16.04.14
2.3.1-2~ubuntu16.04.15
2.3.1-2~ubuntu16.04.16

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
    "ubuntu_priority": "low",
    "binaries": [
        {
            "libruby2.3-dbgsym": "2.3.1-2~ubuntu16.04.16+esm1",
            "ruby2.3-tcltk": "2.3.1-2~ubuntu16.04.16+esm1",
            "ruby2.3-dev-dbgsym": "2.3.1-2~ubuntu16.04.16+esm1",
            "libruby2.3-dbg": "2.3.1-2~ubuntu16.04.16+esm1",
            "ruby2.3-dev": "2.3.1-2~ubuntu16.04.16+esm1",
            "ruby2.3-dbgsym": "2.3.1-2~ubuntu16.04.16+esm1",
            "libruby2.3": "2.3.1-2~ubuntu16.04.16+esm1",
            "ruby2.3-tcltk-dbgsym": "2.3.1-2~ubuntu16.04.16+esm1",
            "ruby2.3": "2.3.1-2~ubuntu16.04.16+esm1",
            "ruby2.3-doc": "2.3.1-2~ubuntu16.04.16+esm1"
        }
    ]
}

Ubuntu:18.04:LTS / ruby2.5

Package

Name
ruby2.5
Purl
pkg:deb/ubuntu/ruby2.5@2.5.1-1ubuntu1.10?arch=src?distro=bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2.5.1-1ubuntu1.10

Affected versions

2.*

2.5.0~preview1-1ubuntu2
2.5.0-4ubuntu1
2.5.0-4ubuntu4
2.5.0-5ubuntu1
2.5.0-6ubuntu1
2.5.1-1ubuntu1
2.5.1-1ubuntu1.1
2.5.1-1ubuntu1.2
2.5.1-1ubuntu1.4
2.5.1-1ubuntu1.5
2.5.1-1ubuntu1.6
2.5.1-1ubuntu1.7
2.5.1-1ubuntu1.8
2.5.1-1ubuntu1.9

Ecosystem specific 

{
    "availability": "No subscription required",
    "ubuntu_priority": "low",
    "binaries": [
        {
            "ruby2.5": "2.5.1-1ubuntu1.10",
            "ruby2.5-dbgsym": "2.5.1-1ubuntu1.10",
            "libruby2.5": "2.5.1-1ubuntu1.10",
            "libruby2.5-dbgsym": "2.5.1-1ubuntu1.10",
            "ruby2.5-dev": "2.5.1-1ubuntu1.10",
            "ruby2.5-doc": "2.5.1-1ubuntu1.10"
        }
    ]
}

Ubuntu:20.04:LTS / ruby2.7

Package

Name
ruby2.7
Purl
pkg:deb/ubuntu/ruby2.7@2.7.0-5ubuntu1.5?arch=src?distro=focal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2.7.0-5ubuntu1.5

Affected versions

2.*

2.7.0-1
2.7.0-2
2.7.0-3
2.7.0-4
2.7.0-4ubuntu1
2.7.0-5ubuntu1
2.7.0-5ubuntu1.1
2.7.0-5ubuntu1.2
2.7.0-5ubuntu1.3
2.7.0-5ubuntu1.4

Ecosystem specific 

{
    "availability": "No subscription required",
    "ubuntu_priority": "low",
    "binaries": [
        {
            "ruby2.7-doc": "2.7.0-5ubuntu1.5",
            "ruby2.7-dbgsym": "2.7.0-5ubuntu1.5",
            "ruby2.7": "2.7.0-5ubuntu1.5",
            "libruby2.7": "2.7.0-5ubuntu1.5",
            "libruby2.7-dbgsym": "2.7.0-5ubuntu1.5",
            "ruby2.7-dev": "2.7.0-5ubuntu1.5"
        }
    ]
}