UBUNTU-CVE-2021-31873

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Source
https://ubuntu.com/security/CVE-2021-31873
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-31873.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2021-31873
Upstream
Downstream
Related
Published
2021-04-30T06:15:00Z
Modified
2025-09-08T16:47:09Z
Severity
  • 9.8 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
  • Ubuntu - low
Summary
[none]
Details

An issue was discovered in klibc before 2.0.9. Additions in the malloc() function may result in an integer overflow and a subsequent heap buffer overflow.

References

Affected packages

Ubuntu:Pro:14.04:LTS / klibc

Package

Name
klibc
Purl
pkg:deb/ubuntu/klibc@2.0.3-0ubuntu1.14.04.3+esm2?arch=source&distro=trusty/esm

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2.0.3-0ubuntu1.14.04.3+esm2

Affected versions

2.*

2.0.1-3.1ubuntu2
2.0.2-1ubuntu1
2.0.2-1ubuntu2
2.0.3-0ubuntu1
2.0.3-0ubuntu1.14.04.1
2.0.3-0ubuntu1.14.04.2
2.0.3-0ubuntu1.14.04.3

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "klibc-utils",
            "binary_version": "2.0.3-0ubuntu1.14.04.3+esm2"
        },
        {
            "binary_name": "libklibc",
            "binary_version": "2.0.3-0ubuntu1.14.04.3+esm2"
        },
        {
            "binary_name": "libklibc-dev",
            "binary_version": "2.0.3-0ubuntu1.14.04.3+esm2"
        }
    ],
    "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro"
}

Ubuntu:Pro:16.04:LTS / klibc

Package

Name
klibc
Purl
pkg:deb/ubuntu/klibc@2.0.4-8ubuntu1.16.04.4+esm1?arch=source&distro=esm-infra/xenial

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2.0.4-8ubuntu1.16.04.4+esm1

Affected versions

2.*

2.0.3-0ubuntu1
2.0.4-4
2.0.4-6
2.0.4-7
2.0.4-8
2.0.4-8ubuntu1
2.0.4-8ubuntu1.16.04.1
2.0.4-8ubuntu1.16.04.2
2.0.4-8ubuntu1.16.04.3
2.0.4-8ubuntu1.16.04.4

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "klibc-utils",
            "binary_version": "2.0.4-8ubuntu1.16.04.4+esm1"
        },
        {
            "binary_name": "libklibc",
            "binary_version": "2.0.4-8ubuntu1.16.04.4+esm1"
        },
        {
            "binary_name": "libklibc-dev",
            "binary_version": "2.0.4-8ubuntu1.16.04.4+esm1"
        }
    ],
    "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro"
}

Ubuntu:18.04:LTS / klibc

Package

Name
klibc
Purl
pkg:deb/ubuntu/klibc@2.0.4-9ubuntu2.1?arch=source&distro=bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2.0.4-9ubuntu2.1

Affected versions

2.*

2.0.4-9ubuntu1
2.0.4-9ubuntu2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "klibc-utils",
            "binary_version": "2.0.4-9ubuntu2.1"
        },
        {
            "binary_name": "libklibc",
            "binary_version": "2.0.4-9ubuntu2.1"
        },
        {
            "binary_name": "libklibc-dev",
            "binary_version": "2.0.4-9ubuntu2.1"
        }
    ],
    "availability": "No subscription required"
}

Ubuntu:20.04:LTS / klibc

Package

Name
klibc
Purl
pkg:deb/ubuntu/klibc@2.0.7-1ubuntu5.1?arch=source&distro=focal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2.0.7-1ubuntu5.1

Affected versions

2.*

2.0.6-1ubuntu1
2.0.6-1ubuntu2
2.0.7-1ubuntu1
2.0.7-1ubuntu3
2.0.7-1ubuntu4
2.0.7-1ubuntu5

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "klibc-utils",
            "binary_version": "2.0.7-1ubuntu5.1"
        },
        {
            "binary_name": "libklibc",
            "binary_version": "2.0.7-1ubuntu5.1"
        },
        {
            "binary_name": "libklibc-dev",
            "binary_version": "2.0.7-1ubuntu5.1"
        }
    ],
    "availability": "No subscription required"
}