UBUNTU-CVE-2021-33644

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Source
https://ubuntu.com/security/CVE-2021-33644
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-33644.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2021-33644
Upstream
Downstream
Related
Published
2022-08-10T20:15:00Z
Modified
2025-09-08T16:47:12Z
Severity
  • 8.1 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

An attacker who submits a crafted tar file with size in header struct being 0 may be able to trigger an calling of malloc(0) for a variable gnu_longname, causing an out-of-bounds read.

References

Affected packages

Ubuntu:Pro:16.04:LTS / libtar

Package

Name
libtar
Purl
pkg:deb/ubuntu/libtar@1.2.20-4ubuntu0.1~esm1?arch=source&distro=esm-apps/xenial

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.2.20-4ubuntu0.1~esm1

Affected versions

1.*

1.2.20-4

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "libtar-dev",
            "binary_version": "1.2.20-4ubuntu0.1~esm1"
        },
        {
            "binary_name": "libtar0",
            "binary_version": "1.2.20-4ubuntu0.1~esm1"
        }
    ]
}

Ubuntu:Pro:18.04:LTS / libtar

Package

Name
libtar
Purl
pkg:deb/ubuntu/libtar@1.2.20-7ubuntu0.1~esm1?arch=source&distro=esm-apps/bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.2.20-7ubuntu0.1~esm1

Affected versions

1.*

1.2.20-7

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "libtar-dev",
            "binary_version": "1.2.20-7ubuntu0.1~esm1"
        },
        {
            "binary_name": "libtar0",
            "binary_version": "1.2.20-7ubuntu0.1~esm1"
        }
    ]
}

Ubuntu:20.04:LTS / libtar

Package

Name
libtar
Purl
pkg:deb/ubuntu/libtar@1.2.20-8ubuntu0.20.04.1?arch=source&distro=focal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.2.20-8ubuntu0.20.04.1

Affected versions

1.*

1.2.20-7
1.2.20-8

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "libtar-dev",
            "binary_version": "1.2.20-8ubuntu0.20.04.1"
        },
        {
            "binary_name": "libtar0",
            "binary_version": "1.2.20-8ubuntu0.20.04.1"
        }
    ]
}

Ubuntu:22.04:LTS / libtar

Package

Name
libtar
Purl
pkg:deb/ubuntu/libtar@1.2.20-8ubuntu0.22.04.1?arch=source&distro=jammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.2.20-8ubuntu0.22.04.1

Affected versions

1.*

1.2.20-8

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "libtar-dev",
            "binary_version": "1.2.20-8ubuntu0.22.04.1"
        },
        {
            "binary_name": "libtar0",
            "binary_version": "1.2.20-8ubuntu0.22.04.1"
        }
    ]
}

Ubuntu:24.04:LTS / libtar

Package

Name
libtar
Purl
pkg:deb/ubuntu/libtar@1.2.20-8.1ubuntu0.24.04.1?arch=source&distro=noble

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.2.20-8.1ubuntu0.24.04.1

Affected versions

1.*

1.2.20-8
1.2.20-8.1
1.2.20-8.1build1

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "libtar-dev",
            "binary_version": "1.2.20-8.1ubuntu0.24.04.1"
        },
        {
            "binary_name": "libtar0t64",
            "binary_version": "1.2.20-8.1ubuntu0.24.04.1"
        }
    ]
}