UBUNTU-CVE-2021-42381

See a problem?
Please try reporting it to the source first.
Source
https://ubuntu.com/security/CVE-2021-42381
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-42381.json
JSON Data
https://api.test.osv.dev/v1/vulns/UBUNTU-CVE-2021-42381
Upstream
Downstream
Related
Published
2021-11-15T21:15:00Z
Modified
2025-09-08T16:47:23Z
Severity
  • 7.2 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
  • 7.2 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
  • Ubuntu - low
Summary
[none]
Details

A use-after-free in Busybox's awk applet leads to denial of service and possibly code execution when processing a crafted awk pattern in the hash_init function

References

Affected packages

Ubuntu:Pro:14.04:LTS / busybox

Package

Name
busybox
Purl
pkg:deb/ubuntu/busybox@1:1.21.0-1ubuntu1.4+esm1?arch=source&distro=esm-infra-legacy/trusty

Affected ranges

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

Affected versions

1:1.*

1:1.20.0-8.1ubuntu1
1:1.20.0-9ubuntu1
1:1.20.0-9ubuntu2
1:1.21.0-1ubuntu1
1:1.21.0-1ubuntu1.4
1:1.21.0-1ubuntu1.4+esm1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "busybox",
            "binary_version": "1:1.21.0-1ubuntu1.4+esm1"
        },
        {
            "binary_name": "busybox-initramfs",
            "binary_version": "1:1.21.0-1ubuntu1.4+esm1"
        },
        {
            "binary_name": "busybox-static",
            "binary_version": "1:1.21.0-1ubuntu1.4+esm1"
        },
        {
            "binary_name": "busybox-syslogd",
            "binary_version": "1:1.21.0-1ubuntu1.4+esm1"
        },
        {
            "binary_name": "udhcpc",
            "binary_version": "1:1.21.0-1ubuntu1.4+esm1"
        },
        {
            "binary_name": "udhcpd",
            "binary_version": "1:1.21.0-1ubuntu1.4+esm1"
        }
    ]
}

Ubuntu:Pro:16.04:LTS / busybox

Package

Name
busybox
Purl
pkg:deb/ubuntu/busybox@1:1.22.0-15ubuntu1.4+esm2?arch=source&distro=esm-infra/xenial

Affected ranges

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

Affected versions

1:1.*

1:1.22.0-15ubuntu1
1:1.22.0-15ubuntu1.4
1:1.22.0-15ubuntu1.4+esm1
1:1.22.0-15ubuntu1.4+esm2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "busybox",
            "binary_version": "1:1.22.0-15ubuntu1.4+esm2"
        },
        {
            "binary_name": "busybox-initramfs",
            "binary_version": "1:1.22.0-15ubuntu1.4+esm2"
        },
        {
            "binary_name": "busybox-static",
            "binary_version": "1:1.22.0-15ubuntu1.4+esm2"
        },
        {
            "binary_name": "busybox-syslogd",
            "binary_version": "1:1.22.0-15ubuntu1.4+esm2"
        },
        {
            "binary_name": "udhcpc",
            "binary_version": "1:1.22.0-15ubuntu1.4+esm2"
        },
        {
            "binary_name": "udhcpd",
            "binary_version": "1:1.22.0-15ubuntu1.4+esm2"
        }
    ]
}

Ubuntu:18.04:LTS / busybox

Package

Name
busybox
Purl
pkg:deb/ubuntu/busybox@1:1.27.2-2ubuntu3.4?arch=source&distro=bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1:1.27.2-2ubuntu3.4

Affected versions

1:1.*

1:1.22.0-19ubuntu2
1:1.27.2-1ubuntu3
1:1.27.2-1ubuntu4
1:1.27.2-2ubuntu2
1:1.27.2-2ubuntu3
1:1.27.2-2ubuntu3.1
1:1.27.2-2ubuntu3.2
1:1.27.2-2ubuntu3.3

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "busybox",
            "binary_version": "1:1.27.2-2ubuntu3.4"
        },
        {
            "binary_name": "busybox-initramfs",
            "binary_version": "1:1.27.2-2ubuntu3.4"
        },
        {
            "binary_name": "busybox-static",
            "binary_version": "1:1.27.2-2ubuntu3.4"
        },
        {
            "binary_name": "busybox-syslogd",
            "binary_version": "1:1.27.2-2ubuntu3.4"
        },
        {
            "binary_name": "udhcpc",
            "binary_version": "1:1.27.2-2ubuntu3.4"
        },
        {
            "binary_name": "udhcpd",
            "binary_version": "1:1.27.2-2ubuntu3.4"
        }
    ],
    "availability": "No subscription required"
}

Ubuntu:20.04:LTS / busybox

Package

Name
busybox
Purl
pkg:deb/ubuntu/busybox@1:1.30.1-4ubuntu6.4?arch=source&distro=focal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1:1.30.1-4ubuntu6.4

Affected versions

1:1.*

1:1.30.1-4ubuntu4
1:1.30.1-4ubuntu5
1:1.30.1-4ubuntu6
1:1.30.1-4ubuntu6.1
1:1.30.1-4ubuntu6.2
1:1.30.1-4ubuntu6.3

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "busybox",
            "binary_version": "1:1.30.1-4ubuntu6.4"
        },
        {
            "binary_name": "busybox-initramfs",
            "binary_version": "1:1.30.1-4ubuntu6.4"
        },
        {
            "binary_name": "busybox-static",
            "binary_version": "1:1.30.1-4ubuntu6.4"
        },
        {
            "binary_name": "busybox-syslogd",
            "binary_version": "1:1.30.1-4ubuntu6.4"
        },
        {
            "binary_name": "udhcpc",
            "binary_version": "1:1.30.1-4ubuntu6.4"
        },
        {
            "binary_name": "udhcpd",
            "binary_version": "1:1.30.1-4ubuntu6.4"
        }
    ],
    "availability": "No subscription required"
}

Ubuntu:22.04:LTS / busybox

Package

Name
busybox
Purl
pkg:deb/ubuntu/busybox@1:1.30.1-7ubuntu2?arch=source&distro=jammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1:1.30.1-7ubuntu2

Affected versions

1:1.*

1:1.30.1-6ubuntu3
1:1.30.1-7ubuntu1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "busybox",
            "binary_version": "1:1.30.1-7ubuntu2"
        },
        {
            "binary_name": "busybox-initramfs",
            "binary_version": "1:1.30.1-7ubuntu2"
        },
        {
            "binary_name": "busybox-static",
            "binary_version": "1:1.30.1-7ubuntu2"
        },
        {
            "binary_name": "busybox-syslogd",
            "binary_version": "1:1.30.1-7ubuntu2"
        },
        {
            "binary_name": "udhcpc",
            "binary_version": "1:1.30.1-7ubuntu2"
        },
        {
            "binary_name": "udhcpd",
            "binary_version": "1:1.30.1-7ubuntu2"
        }
    ],
    "availability": "No subscription required"
}