UBUNTU-CVE-2020-11721

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Source
https://ubuntu.com/security/CVE-2020-11721
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-11721.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2020-11721
Upstream
Published
2020-04-12T19:15:00Z
Modified
2026-05-20T16:04:04.981464821Z
Severity
  • 6.5 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

load_png in loader.c in libsixel.a in libsixel 1.8.6 has an uninitialized pointer leading to an invalid call to free, which can cause a denial of service.

References

Affected packages

Ubuntu:16.04:LTS
libsixel

Package

Name
libsixel
Purl
pkg:deb/ubuntu/libsixel?arch=source&distro=xenial

Affected ranges

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

Affected versions

1.*
1.4.2-1
1.5.2-2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1.5.2-2",
            "binary_name": "libsixel-bin"
        },
        {
            "binary_version": "1.5.2-2",
            "binary_name": "libsixel1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-11721.json"
Ubuntu:18.04:LTS
libsixel

Package

Name
libsixel
Purl
pkg:deb/ubuntu/libsixel?arch=source&distro=bionic

Affected ranges

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

Affected versions

1.*
1.5.2-2
1.7.3-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1.7.3-1",
            "binary_name": "libsixel-bin"
        },
        {
            "binary_version": "1.7.3-1",
            "binary_name": "libsixel-examples"
        },
        {
            "binary_version": "1.7.3-1",
            "binary_name": "libsixel1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-11721.json"
Ubuntu:20.04:LTS
libsixel

Package

Name
libsixel
Purl
pkg:deb/ubuntu/libsixel?arch=source&distro=focal

Affected ranges

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

Affected versions

1.*
1.8.2-1
1.8.2-2.1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1.8.2-2.1",
            "binary_name": "libsixel-bin"
        },
        {
            "binary_version": "1.8.2-2.1",
            "binary_name": "libsixel-examples"
        },
        {
            "binary_version": "1.8.2-2.1",
            "binary_name": "libsixel1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-11721.json"
Ubuntu:22.04:LTS
libsixel

Package

Name
libsixel
Purl
pkg:deb/ubuntu/libsixel?arch=source&distro=jammy

Affected ranges

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

Affected versions

1.*
1.8.6-2
1.10.3-2
1.10.3-3

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1.10.3-3",
            "binary_name": "libsixel-bin"
        },
        {
            "binary_version": "1.10.3-3",
            "binary_name": "libsixel-examples"
        },
        {
            "binary_version": "1.10.3-3",
            "binary_name": "libsixel1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-11721.json"
Ubuntu:24.04:LTS
libsixel

Package

Name
libsixel
Purl
pkg:deb/ubuntu/libsixel?arch=source&distro=noble

Affected ranges

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

Affected versions

1.*
1.10.3-3
1.10.3-3build1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1.10.3-3build1",
            "binary_name": "libsixel-bin"
        },
        {
            "binary_version": "1.10.3-3build1",
            "binary_name": "libsixel-examples"
        },
        {
            "binary_version": "1.10.3-3build1",
            "binary_name": "libsixel1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-11721.json"
Ubuntu:25.10
libsixel

Package

Name
libsixel
Purl
pkg:deb/ubuntu/libsixel?arch=source&distro=questing

Affected ranges

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

Affected versions

1.*
1.10.5-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1.10.5-1",
            "binary_name": "libsixel-bin"
        },
        {
            "binary_version": "1.10.5-1",
            "binary_name": "libsixel-examples"
        },
        {
            "binary_version": "1.10.5-1",
            "binary_name": "libsixel1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-11721.json"
Ubuntu:26.04:LTS
libsixel

Package

Name
libsixel
Purl
pkg:deb/ubuntu/libsixel?arch=source&distro=resolute

Affected ranges

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

Affected versions

1.*
1.10.5-1
1.10.5-1build1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1.10.5-1build1",
            "binary_name": "libsixel-bin"
        },
        {
            "binary_version": "1.10.5-1build1",
            "binary_name": "libsixel-examples"
        },
        {
            "binary_version": "1.10.5-1build1",
            "binary_name": "libsixel1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-11721.json"