UBUNTU-CVE-2021-33910

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Source

https://ubuntu.com/security/CVE-2021-33910

Import Source

https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-33910.json

JSON Data

https://api.osv.dev/v1/vulns/UBUNTU-CVE-2021-33910

Upstream

CVE-2021-33910

Downstream

USN-5013-1

USN-5013-2

Related

Published

2021-07-20T12:00:00Z

Modified

2025-09-08T16:47:13Z

Severity

5.5 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
5.5 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Ubuntu - high

Summary

[none]

Details

basic/unit-name.c in systemd prior to 246.15, 247.8, 248.5, and 249.1 has a Memory Allocation with an Excessive Size Value (involving strdupa and alloca for a pathname controlled by a local attacker) that results in an operating system crash.

References

Affected packages

Ubuntu:Pro:16.04:LTS / systemd

Package

Name: systemd
Purl: pkg:deb/ubuntu/systemd@229-4ubuntu21.31+esm1?arch=source&distro=esm-infra/xenial

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

229-4ubuntu21.31+esm1

Affected versions

Other

225-1ubuntu9

227-2ubuntu1

227-2ubuntu2

228-1ubuntu2

228-2ubuntu1

228-2ubuntu2

228-3ubuntu1

228-4ubuntu1

228-4ubuntu2

228-5ubuntu1

228-5ubuntu2

228-5ubuntu3

228-6ubuntu1

229-1ubuntu2

229-1ubuntu4

229-2ubuntu1

229-3ubuntu1

229-3ubuntu2

229-4ubuntu1

229-4ubuntu4

229-4ubuntu5

229-4ubuntu6

229-4ubuntu7

229-4ubuntu8

229-4ubuntu10

229-4ubuntu11

229-4ubuntu12

229-4ubuntu13

229-4ubuntu16

229-4ubuntu17

229-4ubuntu19

229-4ubuntu20

229-4ubuntu21

229-4ubuntu21.*

229-4ubuntu21.1

229-4ubuntu21.2

229-4ubuntu21.3

229-4ubuntu21.4

229-4ubuntu21.5

229-4ubuntu21.6

229-4ubuntu21.8

229-4ubuntu21.9

229-4ubuntu21.10

229-4ubuntu21.15

229-4ubuntu21.16

229-4ubuntu21.17

229-4ubuntu21.19

229-4ubuntu21.21

229-4ubuntu21.22

229-4ubuntu21.23

229-4ubuntu21.27

229-4ubuntu21.28

229-4ubuntu21.29

229-4ubuntu21.31

Ecosystem specific

{
    "binaries": [
        {
            "binary_version": "229-4ubuntu21.31+esm1",
            "binary_name": "libnss-myhostname"
        },
        {
            "binary_version": "229-4ubuntu21.31+esm1",
            "binary_name": "libnss-mymachines"
        },
        {
            "binary_version": "229-4ubuntu21.31+esm1",
            "binary_name": "libnss-resolve"
        },
        {
            "binary_version": "229-4ubuntu21.31+esm1",
            "binary_name": "libpam-systemd"
        },
        {
            "binary_version": "229-4ubuntu21.31+esm1",
            "binary_name": "libsystemd-dev"
        },
        {
            "binary_version": "229-4ubuntu21.31+esm1",
            "binary_name": "libsystemd0"
        },
        {
            "binary_version": "229-4ubuntu21.31+esm1",
            "binary_name": "libudev-dev"
        },
        {
            "binary_version": "229-4ubuntu21.31+esm1",
            "binary_name": "libudev1"
        },
        {
            "binary_version": "229-4ubuntu21.31+esm1",
            "binary_name": "systemd"
        },
        {
            "binary_version": "229-4ubuntu21.31+esm1",
            "binary_name": "systemd-container"
        },
        {
            "binary_version": "229-4ubuntu21.31+esm1",
            "binary_name": "systemd-coredump"
        },
        {
            "binary_version": "229-4ubuntu21.31+esm1",
            "binary_name": "systemd-journal-remote"
        },
        {
            "binary_version": "229-4ubuntu21.31+esm1",
            "binary_name": "systemd-sysv"
        },
        {
            "binary_version": "229-4ubuntu21.31+esm1",
            "binary_name": "udev"
        }
    ],
    "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro"
}

Ubuntu:18.04:LTS / systemd

Package

Name: systemd
Purl: pkg:deb/ubuntu/systemd@237-3ubuntu10.49?arch=source&distro=bionic

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

237-3ubuntu10.49

Affected versions

Other

234-2ubuntu12

235-2ubuntu3

235-3ubuntu2

235-3ubuntu3

237-3ubuntu3

237-3ubuntu4

237-3ubuntu6

237-3ubuntu7

237-3ubuntu8

237-3ubuntu10

237-3ubuntu10.*

237-3ubuntu10.2

237-3ubuntu10.3

237-3ubuntu10.4

237-3ubuntu10.6

237-3ubuntu10.9

237-3ubuntu10.11

237-3ubuntu10.12

237-3ubuntu10.13

237-3ubuntu10.15

237-3ubuntu10.17

237-3ubuntu10.19

237-3ubuntu10.20

237-3ubuntu10.21

237-3ubuntu10.22

237-3ubuntu10.23

237-3ubuntu10.24

237-3ubuntu10.25

237-3ubuntu10.26

237-3ubuntu10.28

237-3ubuntu10.29

237-3ubuntu10.31

237-3ubuntu10.33

237-3ubuntu10.38

237-3ubuntu10.39

237-3ubuntu10.40

237-3ubuntu10.41

237-3ubuntu10.42

237-3ubuntu10.43

237-3ubuntu10.44

237-3ubuntu10.45

237-3ubuntu10.46

237-3ubuntu10.47

237-3ubuntu10.48

Ecosystem specific

{
    "binaries": [
        {
            "binary_version": "237-3ubuntu10.49",
            "binary_name": "libnss-myhostname"
        },
        {
            "binary_version": "237-3ubuntu10.49",
            "binary_name": "libnss-mymachines"
        },
        {
            "binary_version": "237-3ubuntu10.49",
            "binary_name": "libnss-resolve"
        },
        {
            "binary_version": "237-3ubuntu10.49",
            "binary_name": "libnss-systemd"
        },
        {
            "binary_version": "237-3ubuntu10.49",
            "binary_name": "libpam-systemd"
        },
        {
            "binary_version": "237-3ubuntu10.49",
            "binary_name": "libsystemd-dev"
        },
        {
            "binary_version": "237-3ubuntu10.49",
            "binary_name": "libsystemd0"
        },
        {
            "binary_version": "237-3ubuntu10.49",
            "binary_name": "libudev-dev"
        },
        {
            "binary_version": "237-3ubuntu10.49",
            "binary_name": "libudev1"
        },
        {
            "binary_version": "237-3ubuntu10.49",
            "binary_name": "systemd"
        },
        {
            "binary_version": "237-3ubuntu10.49",
            "binary_name": "systemd-container"
        },
        {
            "binary_version": "237-3ubuntu10.49",
            "binary_name": "systemd-coredump"
        },
        {
            "binary_version": "237-3ubuntu10.49",
            "binary_name": "systemd-journal-remote"
        },
        {
            "binary_version": "237-3ubuntu10.49",
            "binary_name": "systemd-sysv"
        },
        {
            "binary_version": "237-3ubuntu10.49",
            "binary_name": "systemd-tests"
        },
        {
            "binary_version": "237-3ubuntu10.49",
            "binary_name": "udev"
        }
    ],
    "availability": "No subscription required"
}

Ubuntu:20.04:LTS / systemd

Package

Name: systemd
Purl: pkg:deb/ubuntu/systemd@245.4-4ubuntu3.10?arch=source&distro=focal

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

245.4-4ubuntu3.10

Affected versions

Other

242-7ubuntu3

243-2ubuntu1

243-3ubuntu1

244-3ubuntu1

244.*

244.1-0ubuntu2

244.1-0ubuntu3

244.2-1ubuntu1

244.3-1ubuntu1

245.*

245.2-1ubuntu1

245.2-1ubuntu2

245.4-2ubuntu1

245.4-4ubuntu1

245.4-4ubuntu3

245.4-4ubuntu3.1

245.4-4ubuntu3.2

245.4-4ubuntu3.3

245.4-4ubuntu3.4

245.4-4ubuntu3.5

245.4-4ubuntu3.6

245.4-4ubuntu3.7

Ecosystem specific

{
    "binaries": [
        {
            "binary_version": "245.4-4ubuntu3.10",
            "binary_name": "libnss-myhostname"
        },
        {
            "binary_version": "245.4-4ubuntu3.10",
            "binary_name": "libnss-mymachines"
        },
        {
            "binary_version": "245.4-4ubuntu3.10",
            "binary_name": "libnss-resolve"
        },
        {
            "binary_version": "245.4-4ubuntu3.10",
            "binary_name": "libnss-systemd"
        },
        {
            "binary_version": "245.4-4ubuntu3.10",
            "binary_name": "libpam-systemd"
        },
        {
            "binary_version": "245.4-4ubuntu3.10",
            "binary_name": "libsystemd-dev"
        },
        {
            "binary_version": "245.4-4ubuntu3.10",
            "binary_name": "libsystemd0"
        },
        {
            "binary_version": "245.4-4ubuntu3.10",
            "binary_name": "libudev-dev"
        },
        {
            "binary_version": "245.4-4ubuntu3.10",
            "binary_name": "libudev1"
        },
        {
            "binary_version": "245.4-4ubuntu3.10",
            "binary_name": "systemd"
        },
        {
            "binary_version": "245.4-4ubuntu3.10",
            "binary_name": "systemd-container"
        },
        {
            "binary_version": "245.4-4ubuntu3.10",
            "binary_name": "systemd-coredump"
        },
        {
            "binary_version": "245.4-4ubuntu3.10",
            "binary_name": "systemd-journal-remote"
        },
        {
            "binary_version": "245.4-4ubuntu3.10",
            "binary_name": "systemd-sysv"
        },
        {
            "binary_version": "245.4-4ubuntu3.10",
            "binary_name": "systemd-tests"
        },
        {
            "binary_version": "245.4-4ubuntu3.10",
            "binary_name": "systemd-timesyncd"
        },
        {
            "binary_version": "245.4-4ubuntu3.10",
            "binary_name": "udev"
        }
    ],
    "availability": "No subscription required"
}