USN-4705-1

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Source
https://ubuntu.com/security/notices/USN-4705-1
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-4705-1.json
JSON Data
https://api.test.osv.dev/v1/vulns/USN-4705-1
Upstream
Related
Published
2021-01-26T18:48:16.165380Z
Modified
2025-10-13T04:35:20Z
Summary
sudo vulnerabilities
Details

It was discovered that Sudo incorrectly handled memory when parsing command lines. A local attacker could possibly use this issue to obtain unintended access to the administrator account. (CVE-2021-3156)

It was discovered that the Sudo sudoedit utility incorrectly handled checking directory permissions. A local attacker could possibly use this issue to bypass file permissions and determine if a directory exists or not. (CVE-2021-23239)

References

Affected packages

Ubuntu:16.04:LTS / sudo

Package

Name
sudo
Purl
pkg:deb/ubuntu/sudo@1.8.16-0ubuntu1.10?arch=source&distro=xenial

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.8.16-0ubuntu1.10

Affected versions

1.*

1.8.12-1ubuntu3
1.8.16-0ubuntu1
1.8.16-0ubuntu1.1
1.8.16-0ubuntu1.2
1.8.16-0ubuntu1.3
1.8.16-0ubuntu1.4
1.8.16-0ubuntu1.5
1.8.16-0ubuntu1.6
1.8.16-0ubuntu1.7
1.8.16-0ubuntu1.8
1.8.16-0ubuntu1.9

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "sudo",
            "binary_version": "1.8.16-0ubuntu1.10"
        },
        {
            "binary_name": "sudo-ldap",
            "binary_version": "1.8.16-0ubuntu1.10"
        }
    ]
}

Database specific

cves_map

{
    "cves": [
        {
            "id": "CVE-2021-3156",
            "severity": [
                {
                    "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                    "type": "CVSS_V3"
                },
                {
                    "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                    "type": "CVSS_V3"
                },
                {
                    "score": "high",
                    "type": "Ubuntu"
                }
            ]
        },
        {
            "id": "CVE-2021-23239",
            "severity": [
                {
                    "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N",
                    "type": "CVSS_V3"
                },
                {
                    "score": "low",
                    "type": "Ubuntu"
                }
            ]
        }
    ],
    "ecosystem": "Ubuntu:16.04:LTS"
}

Ubuntu:18.04:LTS / sudo

Package

Name
sudo
Purl
pkg:deb/ubuntu/sudo@1.8.21p2-3ubuntu1.4?arch=source&distro=bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.8.21p2-3ubuntu1.4

Affected versions

1.*

1.8.20p2-1ubuntu1
1.8.21p2-2ubuntu1
1.8.21p2-3ubuntu1
1.8.21p2-3ubuntu1.1
1.8.21p2-3ubuntu1.2
1.8.21p2-3ubuntu1.3

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "sudo",
            "binary_version": "1.8.21p2-3ubuntu1.4"
        },
        {
            "binary_name": "sudo-ldap",
            "binary_version": "1.8.21p2-3ubuntu1.4"
        }
    ]
}

Database specific

cves_map

{
    "cves": [
        {
            "id": "CVE-2021-3156",
            "severity": [
                {
                    "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                    "type": "CVSS_V3"
                },
                {
                    "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                    "type": "CVSS_V3"
                },
                {
                    "score": "high",
                    "type": "Ubuntu"
                }
            ]
        },
        {
            "id": "CVE-2021-23239",
            "severity": [
                {
                    "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N",
                    "type": "CVSS_V3"
                },
                {
                    "score": "low",
                    "type": "Ubuntu"
                }
            ]
        }
    ],
    "ecosystem": "Ubuntu:18.04:LTS"
}

Ubuntu:20.04:LTS / sudo

Package

Name
sudo
Purl
pkg:deb/ubuntu/sudo@1.8.31-1ubuntu1.2?arch=source&distro=focal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.8.31-1ubuntu1.2

Affected versions

1.*

1.8.27-1ubuntu4
1.8.29-1ubuntu1
1.8.31-1ubuntu1
1.8.31-1ubuntu1.1

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "sudo",
            "binary_version": "1.8.31-1ubuntu1.2"
        },
        {
            "binary_name": "sudo-ldap",
            "binary_version": "1.8.31-1ubuntu1.2"
        }
    ]
}

Database specific

cves_map

{
    "cves": [
        {
            "id": "CVE-2021-3156",
            "severity": [
                {
                    "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                    "type": "CVSS_V3"
                },
                {
                    "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                    "type": "CVSS_V3"
                },
                {
                    "score": "high",
                    "type": "Ubuntu"
                }
            ]
        },
        {
            "id": "CVE-2021-23239",
            "severity": [
                {
                    "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N",
                    "type": "CVSS_V3"
                },
                {
                    "score": "low",
                    "type": "Ubuntu"
                }
            ]
        }
    ],
    "ecosystem": "Ubuntu:20.04:LTS"
}