UBUNTU-CVE-2021-3403

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Source
https://ubuntu.com/security/CVE-2021-3403
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-3403.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2021-3403
Upstream
Published
2021-03-04T22:15:00Z
Modified
2025-09-08T16:46:43Z
Severity
  • 7.8 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

In ytnef 1.9.3, the TNEFSubjectHandler function in lib/ytnef.c allows remote attackers to cause a denial-of-service (and potentially code execution) due to a double free which can be triggered via a crafted file.

References

Affected packages

Ubuntu:Pro:16.04:LTS / libytnef

Package

Name
libytnef
Purl
pkg:deb/ubuntu/libytnef@1.5-9ubuntu0.1?arch=source&distro=esm-apps/xenial

Affected ranges

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

Affected versions

1.*

1.5-6
1.5-9
1.5-9ubuntu0.1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1.5-9ubuntu0.1",
            "binary_name": "libytnef0"
        },
        {
            "binary_version": "1.5-9ubuntu0.1",
            "binary_name": "libytnef0-dev"
        }
    ]
}

Ubuntu:Pro:18.04:LTS / libytnef

Package

Name
libytnef
Purl
pkg:deb/ubuntu/libytnef@1.9.2-2?arch=source&distro=esm-apps/bionic

Affected ranges

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

Affected versions

1.*

1.9.2-2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1.9.2-2",
            "binary_name": "libytnef0"
        },
        {
            "binary_version": "1.9.2-2",
            "binary_name": "libytnef0-dev"
        },
        {
            "binary_version": "1.9.2-2",
            "binary_name": "ytnef-tools"
        }
    ]
}

Ubuntu:Pro:20.04:LTS / libytnef

Package

Name
libytnef
Purl
pkg:deb/ubuntu/libytnef@1.9.3-1?arch=source&distro=esm-apps/focal

Affected ranges

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

Affected versions

1.*

1.9.3-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1.9.3-1",
            "binary_name": "libytnef0"
        },
        {
            "binary_version": "1.9.3-1",
            "binary_name": "libytnef0-dev"
        },
        {
            "binary_version": "1.9.3-1",
            "binary_name": "ytnef-tools"
        }
    ]
}

Ubuntu:22.04:LTS / libytnef

Package

Name
libytnef
Purl
pkg:deb/ubuntu/libytnef@2.0-1?arch=source&distro=jammy

Affected ranges

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

Affected versions

1.*

1.9.3-3

2.*

2.0-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "2.0-1",
            "binary_name": "libytnef0"
        },
        {
            "binary_version": "2.0-1",
            "binary_name": "libytnef0-dev"
        },
        {
            "binary_version": "2.0-1",
            "binary_name": "ytnef-tools"
        }
    ]
}

Ubuntu:24.04:LTS / libytnef

Package

Name
libytnef
Purl
pkg:deb/ubuntu/libytnef@2.1.2-1build1?arch=source&distro=noble

Affected ranges

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

Affected versions

2.*

2.0-1
2.1.2-1
2.1.2-1build1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "2.1.2-1build1",
            "binary_name": "libytnef0"
        },
        {
            "binary_version": "2.1.2-1build1",
            "binary_name": "libytnef0-dev"
        },
        {
            "binary_version": "2.1.2-1build1",
            "binary_name": "ytnef-tools"
        }
    ]
}

Ubuntu:25.04 / libytnef

Package

Name
libytnef
Purl
pkg:deb/ubuntu/libytnef@2.1.2-1build1?arch=source&distro=plucky

Affected ranges

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

Affected versions

2.*

2.1.2-1build1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "2.1.2-1build1",
            "binary_name": "libytnef0"
        },
        {
            "binary_version": "2.1.2-1build1",
            "binary_name": "libytnef0-dev"
        },
        {
            "binary_version": "2.1.2-1build1",
            "binary_name": "ytnef-tools"
        }
    ]
}