USN-4968-1

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Source
https://ubuntu.com/security/notices/USN-4968-1
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-4968-1.json
JSON Data
https://api.test.osv.dev/v1/vulns/USN-4968-1
Upstream
Related
Published
2021-05-26T17:29:47.937109Z
Modified
2025-10-13T04:35:30Z
Summary
lz4 vulnerability
Details

It was discovered that LZ4 incorrectly handled certain memory operations. If a user or automated system were tricked into uncompressing a specially- crafted LZ4 file, a remote attacker could use this issue to cause LZ4 to crash, resulting in a denial of service, or possibly execute arbitrary code.

References

Affected packages

Ubuntu:18.04:LTS / lz4

Package

Name
lz4
Purl
pkg:deb/ubuntu/lz4@0.0~r131-2ubuntu3.1?arch=source&distro=bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
0.0~r131-2ubuntu3.1

Affected versions

0.*

0.0~r131-2ubuntu2
0.0~r131-2ubuntu3

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_version": "0.0~r131-2ubuntu3.1",
            "binary_name": "liblz4-1"
        },
        {
            "binary_version": "0.0~r131-2ubuntu3.1",
            "binary_name": "liblz4-dev"
        },
        {
            "binary_version": "0.0~r131-2ubuntu3.1",
            "binary_name": "liblz4-tool"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-4968-1.json"

cves_map

{
    "cves": [
        {
            "id": "CVE-2021-3520",
            "severity": [
                {
                    "type": "CVSS_V3",
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
                },
                {
                    "type": "Ubuntu",
                    "score": "medium"
                }
            ]
        }
    ],
    "ecosystem": "Ubuntu:18.04:LTS"
}

Ubuntu:20.04:LTS / lz4

Package

Name
lz4
Purl
pkg:deb/ubuntu/lz4@1.9.2-2ubuntu0.20.04.1?arch=source&distro=focal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.9.2-2ubuntu0.20.04.1

Affected versions

1.*

1.9.1-1
1.9.1-2
1.9.2-2

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_version": "1.9.2-2ubuntu0.20.04.1",
            "binary_name": "liblz4-1"
        },
        {
            "binary_version": "1.9.2-2ubuntu0.20.04.1",
            "binary_name": "liblz4-dev"
        },
        {
            "binary_version": "1.9.2-2ubuntu0.20.04.1",
            "binary_name": "liblz4-tool"
        },
        {
            "binary_version": "1.9.2-2ubuntu0.20.04.1",
            "binary_name": "lz4"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-4968-1.json"

cves_map

{
    "cves": [
        {
            "id": "CVE-2021-3520",
            "severity": [
                {
                    "type": "CVSS_V3",
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
                },
                {
                    "type": "Ubuntu",
                    "score": "medium"
                }
            ]
        }
    ],
    "ecosystem": "Ubuntu:20.04:LTS"
}