UBUNTU-CVE-2020-14363

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Source
https://ubuntu.com/security/CVE-2020-14363
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-14363.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2020-14363
Upstream
Downstream
Related
Published
2020-08-25T13:00:00Z
Modified
2025-07-16T07:19:22.625197Z
Severity
  • 7.8 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
  • 7.8 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

An integer overflow vulnerability leading to a double-free was found in libX11. This flaw allows a local privileged attacker to cause an application compiled with libX11 to crash, or in some cases, result in arbitrary code execution. The highest threat from this flaw is to confidentiality, integrity as well as system availability.

References

Affected packages

Ubuntu:Pro:14.04:LTS / libx11

Package

Name
libx11
Purl
pkg:deb/ubuntu/libx11@2:1.6.2-1ubuntu2.1+esm1?arch=source&distro=trusty/esm

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2:1.6.2-1ubuntu2.1+esm1

Affected versions

2:1.*

2:1.6.1-1ubuntu1
2:1.6.1-1ubuntu2
2:1.6.2-1ubuntu1
2:1.6.2-1ubuntu2
2:1.6.2-1ubuntu2.1

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "libx11-6",
            "binary_version": "2:1.6.2-1ubuntu2.1+esm1"
        },
        {
            "binary_name": "libx11-6-dbg",
            "binary_version": "2:1.6.2-1ubuntu2.1+esm1"
        },
        {
            "binary_name": "libx11-6-dbgsym",
            "binary_version": "2:1.6.2-1ubuntu2.1+esm1"
        },
        {
            "binary_name": "libx11-6-udeb",
            "binary_version": "2:1.6.2-1ubuntu2.1+esm1"
        },
        {
            "binary_name": "libx11-6-udeb-dbgsym",
            "binary_version": "2:1.6.2-1ubuntu2.1+esm1"
        },
        {
            "binary_name": "libx11-data",
            "binary_version": "2:1.6.2-1ubuntu2.1+esm1"
        },
        {
            "binary_name": "libx11-dev",
            "binary_version": "2:1.6.2-1ubuntu2.1+esm1"
        },
        {
            "binary_name": "libx11-dev-dbgsym",
            "binary_version": "2:1.6.2-1ubuntu2.1+esm1"
        },
        {
            "binary_name": "libx11-doc",
            "binary_version": "2:1.6.2-1ubuntu2.1+esm1"
        },
        {
            "binary_name": "libx11-xcb-dev",
            "binary_version": "2:1.6.2-1ubuntu2.1+esm1"
        },
        {
            "binary_name": "libx11-xcb-dev-dbgsym",
            "binary_version": "2:1.6.2-1ubuntu2.1+esm1"
        },
        {
            "binary_name": "libx11-xcb1",
            "binary_version": "2:1.6.2-1ubuntu2.1+esm1"
        },
        {
            "binary_name": "libx11-xcb1-dbg",
            "binary_version": "2:1.6.2-1ubuntu2.1+esm1"
        },
        {
            "binary_name": "libx11-xcb1-dbgsym",
            "binary_version": "2:1.6.2-1ubuntu2.1+esm1"
        }
    ]
}

Ubuntu:16.04:LTS / libx11

Package

Name
libx11
Purl
pkg:deb/ubuntu/libx11@2:1.6.3-1ubuntu2.2?arch=source&distro=xenial

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2:1.6.3-1ubuntu2.2

Affected versions

2:1.*

2:1.6.3-1ubuntu2
2:1.6.3-1ubuntu2.1

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "libx11-6",
            "binary_version": "2:1.6.3-1ubuntu2.2"
        },
        {
            "binary_name": "libx11-6-dbg",
            "binary_version": "2:1.6.3-1ubuntu2.2"
        },
        {
            "binary_name": "libx11-6-dbgsym",
            "binary_version": "2:1.6.3-1ubuntu2.2"
        },
        {
            "binary_name": "libx11-6-udeb",
            "binary_version": "2:1.6.3-1ubuntu2.2"
        },
        {
            "binary_name": "libx11-6-udeb-dbgsym",
            "binary_version": "2:1.6.3-1ubuntu2.2"
        },
        {
            "binary_name": "libx11-data",
            "binary_version": "2:1.6.3-1ubuntu2.2"
        },
        {
            "binary_name": "libx11-dev",
            "binary_version": "2:1.6.3-1ubuntu2.2"
        },
        {
            "binary_name": "libx11-dev-dbgsym",
            "binary_version": "2:1.6.3-1ubuntu2.2"
        },
        {
            "binary_name": "libx11-doc",
            "binary_version": "2:1.6.3-1ubuntu2.2"
        },
        {
            "binary_name": "libx11-xcb-dev",
            "binary_version": "2:1.6.3-1ubuntu2.2"
        },
        {
            "binary_name": "libx11-xcb-dev-dbgsym",
            "binary_version": "2:1.6.3-1ubuntu2.2"
        },
        {
            "binary_name": "libx11-xcb1",
            "binary_version": "2:1.6.3-1ubuntu2.2"
        },
        {
            "binary_name": "libx11-xcb1-dbg",
            "binary_version": "2:1.6.3-1ubuntu2.2"
        },
        {
            "binary_name": "libx11-xcb1-dbgsym",
            "binary_version": "2:1.6.3-1ubuntu2.2"
        }
    ]
}

Ubuntu:18.04:LTS / libx11

Package

Name
libx11
Purl
pkg:deb/ubuntu/libx11@2:1.6.4-3ubuntu0.3?arch=source&distro=bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2:1.6.4-3ubuntu0.3

Affected versions

2:1.*

2:1.6.4-3
2:1.6.4-3ubuntu0.1
2:1.6.4-3ubuntu0.2

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "libx11-6",
            "binary_version": "2:1.6.4-3ubuntu0.3"
        },
        {
            "binary_name": "libx11-6-dbgsym",
            "binary_version": "2:1.6.4-3ubuntu0.3"
        },
        {
            "binary_name": "libx11-6-udeb",
            "binary_version": "2:1.6.4-3ubuntu0.3"
        },
        {
            "binary_name": "libx11-data",
            "binary_version": "2:1.6.4-3ubuntu0.3"
        },
        {
            "binary_name": "libx11-dev",
            "binary_version": "2:1.6.4-3ubuntu0.3"
        },
        {
            "binary_name": "libx11-doc",
            "binary_version": "2:1.6.4-3ubuntu0.3"
        },
        {
            "binary_name": "libx11-xcb-dev",
            "binary_version": "2:1.6.4-3ubuntu0.3"
        },
        {
            "binary_name": "libx11-xcb1",
            "binary_version": "2:1.6.4-3ubuntu0.3"
        },
        {
            "binary_name": "libx11-xcb1-dbgsym",
            "binary_version": "2:1.6.4-3ubuntu0.3"
        }
    ]
}

Ubuntu:20.04:LTS / libx11

Package

Name
libx11
Purl
pkg:deb/ubuntu/libx11@2:1.6.9-2ubuntu1.1?arch=source&distro=focal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2:1.6.9-2ubuntu1.1

Affected versions

2:1.*

2:1.6.8-1
2:1.6.9-2
2:1.6.9-2ubuntu1

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "libx11-6",
            "binary_version": "2:1.6.9-2ubuntu1.1"
        },
        {
            "binary_name": "libx11-6-dbgsym",
            "binary_version": "2:1.6.9-2ubuntu1.1"
        },
        {
            "binary_name": "libx11-6-udeb",
            "binary_version": "2:1.6.9-2ubuntu1.1"
        },
        {
            "binary_name": "libx11-data",
            "binary_version": "2:1.6.9-2ubuntu1.1"
        },
        {
            "binary_name": "libx11-dev",
            "binary_version": "2:1.6.9-2ubuntu1.1"
        },
        {
            "binary_name": "libx11-doc",
            "binary_version": "2:1.6.9-2ubuntu1.1"
        },
        {
            "binary_name": "libx11-xcb-dev",
            "binary_version": "2:1.6.9-2ubuntu1.1"
        },
        {
            "binary_name": "libx11-xcb1",
            "binary_version": "2:1.6.9-2ubuntu1.1"
        },
        {
            "binary_name": "libx11-xcb1-dbgsym",
            "binary_version": "2:1.6.9-2ubuntu1.1"
        }
    ]
}