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
Downstream
Related
Published
2021-07-20T12:00:00Z
Modified
2025-07-16T07:19:52.120538Z
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-myhostname-dbgsym"
        },
        {
            "binary_version": "229-4ubuntu21.31+esm1",
            "binary_name": "libnss-mymachines"
        },
        {
            "binary_version": "229-4ubuntu21.31+esm1",
            "binary_name": "libnss-mymachines-dbgsym"
        },
        {
            "binary_version": "229-4ubuntu21.31+esm1",
            "binary_name": "libnss-resolve"
        },
        {
            "binary_version": "229-4ubuntu21.31+esm1",
            "binary_name": "libnss-resolve-dbgsym"
        },
        {
            "binary_version": "229-4ubuntu21.31+esm1",
            "binary_name": "libpam-systemd"
        },
        {
            "binary_version": "229-4ubuntu21.31+esm1",
            "binary_name": "libpam-systemd-dbgsym"
        },
        {
            "binary_version": "229-4ubuntu21.31+esm1",
            "binary_name": "libsystemd-dev"
        },
        {
            "binary_version": "229-4ubuntu21.31+esm1",
            "binary_name": "libsystemd-dev-dbgsym"
        },
        {
            "binary_version": "229-4ubuntu21.31+esm1",
            "binary_name": "libsystemd0"
        },
        {
            "binary_version": "229-4ubuntu21.31+esm1",
            "binary_name": "libsystemd0-dbgsym"
        },
        {
            "binary_version": "229-4ubuntu21.31+esm1",
            "binary_name": "libudev-dev"
        },
        {
            "binary_version": "229-4ubuntu21.31+esm1",
            "binary_name": "libudev-dev-dbgsym"
        },
        {
            "binary_version": "229-4ubuntu21.31+esm1",
            "binary_name": "libudev1"
        },
        {
            "binary_version": "229-4ubuntu21.31+esm1",
            "binary_name": "libudev1-dbgsym"
        },
        {
            "binary_version": "229-4ubuntu21.31+esm1",
            "binary_name": "libudev1-udeb"
        },
        {
            "binary_version": "229-4ubuntu21.31+esm1",
            "binary_name": "libudev1-udeb-dbgsym"
        },
        {
            "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-container-dbgsym"
        },
        {
            "binary_version": "229-4ubuntu21.31+esm1",
            "binary_name": "systemd-coredump"
        },
        {
            "binary_version": "229-4ubuntu21.31+esm1",
            "binary_name": "systemd-coredump-dbgsym"
        },
        {
            "binary_version": "229-4ubuntu21.31+esm1",
            "binary_name": "systemd-dbg"
        },
        {
            "binary_version": "229-4ubuntu21.31+esm1",
            "binary_name": "systemd-dbgsym"
        },
        {
            "binary_version": "229-4ubuntu21.31+esm1",
            "binary_name": "systemd-journal-remote"
        },
        {
            "binary_version": "229-4ubuntu21.31+esm1",
            "binary_name": "systemd-journal-remote-dbgsym"
        },
        {
            "binary_version": "229-4ubuntu21.31+esm1",
            "binary_name": "systemd-sysv"
        },
        {
            "binary_version": "229-4ubuntu21.31+esm1",
            "binary_name": "systemd-sysv-dbgsym"
        },
        {
            "binary_version": "229-4ubuntu21.31+esm1",
            "binary_name": "udev"
        },
        {
            "binary_version": "229-4ubuntu21.31+esm1",
            "binary_name": "udev-dbgsym"
        },
        {
            "binary_version": "229-4ubuntu21.31+esm1",
            "binary_name": "udev-udeb"
        },
        {
            "binary_version": "229-4ubuntu21.31+esm1",
            "binary_name": "udev-udeb-dbgsym"
        }
    ],
    "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-myhostname-dbgsym"
        },
        {
            "binary_version": "237-3ubuntu10.49",
            "binary_name": "libnss-mymachines"
        },
        {
            "binary_version": "237-3ubuntu10.49",
            "binary_name": "libnss-mymachines-dbgsym"
        },
        {
            "binary_version": "237-3ubuntu10.49",
            "binary_name": "libnss-resolve"
        },
        {
            "binary_version": "237-3ubuntu10.49",
            "binary_name": "libnss-resolve-dbgsym"
        },
        {
            "binary_version": "237-3ubuntu10.49",
            "binary_name": "libnss-systemd"
        },
        {
            "binary_version": "237-3ubuntu10.49",
            "binary_name": "libnss-systemd-dbgsym"
        },
        {
            "binary_version": "237-3ubuntu10.49",
            "binary_name": "libpam-systemd"
        },
        {
            "binary_version": "237-3ubuntu10.49",
            "binary_name": "libpam-systemd-dbgsym"
        },
        {
            "binary_version": "237-3ubuntu10.49",
            "binary_name": "libsystemd-dev"
        },
        {
            "binary_version": "237-3ubuntu10.49",
            "binary_name": "libsystemd0"
        },
        {
            "binary_version": "237-3ubuntu10.49",
            "binary_name": "libsystemd0-dbgsym"
        },
        {
            "binary_version": "237-3ubuntu10.49",
            "binary_name": "libudev-dev"
        },
        {
            "binary_version": "237-3ubuntu10.49",
            "binary_name": "libudev1"
        },
        {
            "binary_version": "237-3ubuntu10.49",
            "binary_name": "libudev1-dbgsym"
        },
        {
            "binary_version": "237-3ubuntu10.49",
            "binary_name": "libudev1-udeb"
        },
        {
            "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-container-dbgsym"
        },
        {
            "binary_version": "237-3ubuntu10.49",
            "binary_name": "systemd-coredump"
        },
        {
            "binary_version": "237-3ubuntu10.49",
            "binary_name": "systemd-coredump-dbgsym"
        },
        {
            "binary_version": "237-3ubuntu10.49",
            "binary_name": "systemd-dbgsym"
        },
        {
            "binary_version": "237-3ubuntu10.49",
            "binary_name": "systemd-journal-remote"
        },
        {
            "binary_version": "237-3ubuntu10.49",
            "binary_name": "systemd-journal-remote-dbgsym"
        },
        {
            "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": "systemd-tests-dbgsym"
        },
        {
            "binary_version": "237-3ubuntu10.49",
            "binary_name": "udev"
        },
        {
            "binary_version": "237-3ubuntu10.49",
            "binary_name": "udev-dbgsym"
        },
        {
            "binary_version": "237-3ubuntu10.49",
            "binary_name": "udev-udeb"
        }
    ],
    "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-myhostname-dbgsym"
        },
        {
            "binary_version": "245.4-4ubuntu3.10",
            "binary_name": "libnss-mymachines"
        },
        {
            "binary_version": "245.4-4ubuntu3.10",
            "binary_name": "libnss-mymachines-dbgsym"
        },
        {
            "binary_version": "245.4-4ubuntu3.10",
            "binary_name": "libnss-resolve"
        },
        {
            "binary_version": "245.4-4ubuntu3.10",
            "binary_name": "libnss-resolve-dbgsym"
        },
        {
            "binary_version": "245.4-4ubuntu3.10",
            "binary_name": "libnss-systemd"
        },
        {
            "binary_version": "245.4-4ubuntu3.10",
            "binary_name": "libnss-systemd-dbgsym"
        },
        {
            "binary_version": "245.4-4ubuntu3.10",
            "binary_name": "libpam-systemd"
        },
        {
            "binary_version": "245.4-4ubuntu3.10",
            "binary_name": "libpam-systemd-dbgsym"
        },
        {
            "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": "libsystemd0-dbgsym"
        },
        {
            "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": "libudev1-dbgsym"
        },
        {
            "binary_version": "245.4-4ubuntu3.10",
            "binary_name": "libudev1-udeb"
        },
        {
            "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-container-dbgsym"
        },
        {
            "binary_version": "245.4-4ubuntu3.10",
            "binary_name": "systemd-coredump"
        },
        {
            "binary_version": "245.4-4ubuntu3.10",
            "binary_name": "systemd-coredump-dbgsym"
        },
        {
            "binary_version": "245.4-4ubuntu3.10",
            "binary_name": "systemd-dbgsym"
        },
        {
            "binary_version": "245.4-4ubuntu3.10",
            "binary_name": "systemd-journal-remote"
        },
        {
            "binary_version": "245.4-4ubuntu3.10",
            "binary_name": "systemd-journal-remote-dbgsym"
        },
        {
            "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-tests-dbgsym"
        },
        {
            "binary_version": "245.4-4ubuntu3.10",
            "binary_name": "systemd-timesyncd"
        },
        {
            "binary_version": "245.4-4ubuntu3.10",
            "binary_name": "systemd-timesyncd-dbgsym"
        },
        {
            "binary_version": "245.4-4ubuntu3.10",
            "binary_name": "udev"
        },
        {
            "binary_version": "245.4-4ubuntu3.10",
            "binary_name": "udev-dbgsym"
        },
        {
            "binary_version": "245.4-4ubuntu3.10",
            "binary_name": "udev-udeb"
        }
    ],
    "availability": "No subscription required"
}