UBUNTU-CVE-2018-16395

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Source
https://ubuntu.com/security/CVE-2018-16395
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2018/UBUNTU-CVE-2018-16395.json
JSON Data
https://api.test.osv.dev/v1/vulns/UBUNTU-CVE-2018-16395
Upstream
Downstream
Related
Published
2018-10-26T00:00:00Z
Modified
2025-10-24T04:47:11Z
Severity
  • 9.8 (Critical) CVSS_V3 - CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

An issue was discovered in the OpenSSL library in Ruby before 2.3.8, 2.4.x before 2.4.5, 2.5.x before 2.5.2, and 2.6.x before 2.6.0-preview3. When two OpenSSL::X509::Name objects are compared using ==, depending on the ordering, non-equal objects may return true. When the first argument is one character longer than the second, or the second argument contains a character that is one less than a character in the same position of the first argument, the result of == will be true. This could be leveraged to create an illegitimate certificate that may be accepted as legitimate and then used in signing or encryption operations.

References

Affected packages

Ubuntu:14.04:LTS / ruby1.9.1

Package

Name
ruby1.9.1
Purl
pkg:deb/ubuntu/ruby1.9.1@1.9.3.484-2ubuntu1.13?arch=source&distro=trusty

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.9.3.484-2ubuntu1.13

Affected versions

1.*

1.9.3.194-8.1ubuntu2
1.9.3.448-1ubuntu1
1.9.3.448-1ubuntu2
1.9.3.484-1ubuntu1
1.9.3.484-1ubuntu2
1.9.3.484-2ubuntu1
1.9.3.484-2ubuntu1.1
1.9.3.484-2ubuntu1.2
1.9.3.484-2ubuntu1.3
1.9.3.484-2ubuntu1.5
1.9.3.484-2ubuntu1.6
1.9.3.484-2ubuntu1.7
1.9.3.484-2ubuntu1.8
1.9.3.484-2ubuntu1.10
1.9.3.484-2ubuntu1.11
1.9.3.484-2ubuntu1.12

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1.9.3.484-2ubuntu1.13",
            "binary_name": "libruby1.9.1"
        },
        {
            "binary_version": "1.9.3.484-2ubuntu1.13",
            "binary_name": "libtcltk-ruby1.9.1"
        },
        {
            "binary_version": "1.9.3.484-2ubuntu1.13",
            "binary_name": "ri1.9.1"
        },
        {
            "binary_version": "1.9.3.484-2ubuntu1.13",
            "binary_name": "ruby1.9.1"
        },
        {
            "binary_version": "1.9.3.484-2ubuntu1.13",
            "binary_name": "ruby1.9.1-dev"
        },
        {
            "binary_version": "1.9.3.484-2ubuntu1.13",
            "binary_name": "ruby1.9.1-examples"
        },
        {
            "binary_version": "1.9.3.484-2ubuntu1.13",
            "binary_name": "ruby1.9.1-full"
        },
        {
            "binary_version": "1.9.3.484-2ubuntu1.13",
            "binary_name": "ruby1.9.3"
        }
    ],
    "availability": "No subscription required"
}

Ubuntu:14.04:LTS / ruby2.0

Package

Name
ruby2.0
Purl
pkg:deb/ubuntu/ruby2.0@2.0.0.484-1ubuntu2.11?arch=source&distro=trusty

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2.0.0.484-1ubuntu2.11

Affected versions

2.*

2.0.0.299-2
2.0.0.343-1
2.0.0.343-1ubuntu1
2.0.0.353-1
2.0.0.353-1ubuntu1
2.0.0.484-1ubuntu1
2.0.0.484-1ubuntu2
2.0.0.484-1ubuntu2.1
2.0.0.484-1ubuntu2.2
2.0.0.484-1ubuntu2.4
2.0.0.484-1ubuntu2.5
2.0.0.484-1ubuntu2.6
2.0.0.484-1ubuntu2.8
2.0.0.484-1ubuntu2.9
2.0.0.484-1ubuntu2.10

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "2.0.0.484-1ubuntu2.11",
            "binary_name": "libruby2.0"
        },
        {
            "binary_version": "2.0.0.484-1ubuntu2.11",
            "binary_name": "ruby2.0"
        },
        {
            "binary_version": "2.0.0.484-1ubuntu2.11",
            "binary_name": "ruby2.0-dev"
        },
        {
            "binary_version": "2.0.0.484-1ubuntu2.11",
            "binary_name": "ruby2.0-tcltk"
        }
    ],
    "availability": "No subscription required"
}

Ubuntu:16.04:LTS / ruby2.3

Package

Name
ruby2.3
Purl
pkg:deb/ubuntu/ruby2.3@2.3.1-2~16.04.11?arch=source&distro=xenial

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2.3.1-2~16.04.11

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

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "2.3.1-2~16.04.11",
            "binary_name": "libruby2.3"
        },
        {
            "binary_version": "2.3.1-2~16.04.11",
            "binary_name": "ruby2.3"
        },
        {
            "binary_version": "2.3.1-2~16.04.11",
            "binary_name": "ruby2.3-dev"
        },
        {
            "binary_version": "2.3.1-2~16.04.11",
            "binary_name": "ruby2.3-tcltk"
        }
    ],
    "availability": "No subscription required"
}

Ubuntu:18.04:LTS / ruby2.5

Package

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

Affected ranges

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

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

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "2.5.1-1ubuntu1.1",
            "binary_name": "libruby2.5"
        },
        {
            "binary_version": "2.5.1-1ubuntu1.1",
            "binary_name": "ruby2.5"
        },
        {
            "binary_version": "2.5.1-1ubuntu1.1",
            "binary_name": "ruby2.5-dev"
        }
    ],
    "availability": "No subscription required"
}

Ubuntu:18.04:LTS / ruby-openssl

Package

Name
ruby-openssl
Purl
pkg:deb/ubuntu/ruby-openssl@2.0.9-0ubuntu1?arch=source&distro=bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

2.*

2.0.4-1
2.0.5-1
2.0.5-1build1
2.0.5-1build2
2.0.5-1build3
2.0.9-0ubuntu1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "2.0.9-0ubuntu1",
            "binary_name": "ruby-openssl"
        }
    ]
}