Vulnerability-Lookup

ubuntu-cve-2019-3843

Vulnerability from osv_ubuntu

Published

2019-04-26 21:29

Modified

2026-04-22 07:38

Summary

Details

It was discovered that a systemd service that uses DynamicUser property can create a SUID/SGID binary that would be allowed to run as the transient service UID/GID even after the service is terminated. A local attacker may use this flaw to access resources that will be owned by a potentially different service in the future, when the UID/GID will be recycled.

Severity

7.8 (High)


                    
                      CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

4.5 (Medium)


                    
                      CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L

7.8 (High)


                    
                      CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

N/A (UNKNOWN)

low

References

URL

Type

	https://ubuntu.com/security/CVE-2019-3843	REPORT
	https://github.com/systemd/systemd-stable/pull/54	REPORT
	https://ubuntu.com/security/notices/USN-4269-1	ADVISORY
	https://www.cve.org/CVERecord?id=CVE-2019-3843	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "libnss-myhostname",
            "binary_version": "237-3ubuntu10.38"
          },
          {
            "binary_name": "libnss-mymachines",
            "binary_version": "237-3ubuntu10.38"
          },
          {
            "binary_name": "libnss-resolve",
            "binary_version": "237-3ubuntu10.38"
          },
          {
            "binary_name": "libnss-systemd",
            "binary_version": "237-3ubuntu10.38"
          },
          {
            "binary_name": "libpam-systemd",
            "binary_version": "237-3ubuntu10.38"
          },
          {
            "binary_name": "libsystemd0",
            "binary_version": "237-3ubuntu10.38"
          },
          {
            "binary_name": "libudev1",
            "binary_version": "237-3ubuntu10.38"
          },
          {
            "binary_name": "systemd",
            "binary_version": "237-3ubuntu10.38"
          },
          {
            "binary_name": "systemd-container",
            "binary_version": "237-3ubuntu10.38"
          },
          {
            "binary_name": "systemd-coredump",
            "binary_version": "237-3ubuntu10.38"
          },
          {
            "binary_name": "systemd-journal-remote",
            "binary_version": "237-3ubuntu10.38"
          },
          {
            "binary_name": "systemd-sysv",
            "binary_version": "237-3ubuntu10.38"
          },
          {
            "binary_name": "systemd-tests",
            "binary_version": "237-3ubuntu10.38"
          },
          {
            "binary_name": "udev",
            "binary_version": "237-3ubuntu10.38"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "systemd",
        "purl": "pkg:deb/ubuntu/systemd@237-3ubuntu10.38?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "237-3ubuntu10.38"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "234-2ubuntu12",
        "235-2ubuntu3",
        "235-3ubuntu2",
        "235-3ubuntu3",
        "237-3ubuntu3",
        "237-3ubuntu4",
        "237-3ubuntu6",
        "237-3ubuntu7",
        "237-3ubuntu8",
        "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"
      ]
    }
  ],
  "aliases": [],
  "details": "It was discovered that a systemd service that uses DynamicUser property can create a SUID/SGID binary that would be allowed to run as the transient service UID/GID even after the service is terminated. A local attacker may use this flaw to access resources that will be owned by a potentially different service in the future, when the UID/GID will be recycled.",
  "id": "UBUNTU-CVE-2019-3843",
  "modified": "2026-04-22T07:38:52Z",
  "published": "2019-04-26T21:29:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2019-3843"
    },
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      "type": "REPORT",
      "url": "https://github.com/systemd/systemd-stable/pull/54"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-4269-1"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2019-3843"
    }
  ],
  "related": [
    "USN-4269-1"
  ],
  "schema_version": "1.7.0",
  "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:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "low",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2019-3843"
  ]
}

CVE-2019-3843 (GCVE-0-2019-3843)

Vulnerability from cvelistv5 – Published: 2019-04-26 20:27 – Updated: 2025-06-09 15:49

Summary

Severity

4.5 (Medium)


                        
                          CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-266

Assigner

redhat

References

7 references

URL	Tags
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2…	x_refsource_CONFIRM
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisoryx_refsource_FEDORA
http://www.securityfocus.com/bid/108116	vdb-entryx_refsource_BID
https://security.netapp.com/advisory/ntap-2019061…	x_refsource_CONFIRM
https://usn.ubuntu.com/4269-1/	vendor-advisoryx_refsource_UBUNTU
https://lists.apache.org/thread.html/rf4c02775860…	mailing-listx_refsource_MLIST
https://lists.apache.org/thread.html/r58af02e294b…	mailing-listx_refsource_MLIST

Impacted products

1 product

Vendor	Product	Version
[freedesktop.org]	systemd	Affected: 242

Show details on NVD website

JSON

To clipboard

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}

usn-4269-1

Vulnerability from osv_ubuntu

Published

2020-02-05 16:39

Modified

2026-04-27 14:11

Summary

systemd vulnerabilities

Details

It was discovered that systemd incorrectly handled certain PIDFile files. A local attacker could possibly use this issue to trick systemd into killing privileged processes. This issue only affected Ubuntu 16.04 LTS. (CVE-2018-16888)

It was discovered that systemd incorrectly handled certain udevadm trigger commands. A local attacker could possibly use this issue to cause systemd to consume resources, leading to a denial of service. (CVE-2019-20386)

Jann Horn discovered that systemd incorrectly handled services that use the DynamicUser property. A local attacker could possibly use this issue to access resources owned by a different service in the future. This issue only affected Ubuntu 18.04 LTS. (CVE-2019-3843, CVE-2019-3844)

Tavis Ormandy discovered that systemd incorrectly handled certain Polkit queries. A local attacker could use this issue to cause systemd to crash, resulting in a denial of service, or possibly execute arbitrary code and escalate privileges. (CVE-2020-1712)

References

URL

Type

	https://ubuntu.com/security/notices/USN-4269-1	ADVISORY
	https://ubuntu.com/security/CVE-2018-16888	REPORT
	https://ubuntu.com/security/CVE-2019-3843	REPORT
	https://ubuntu.com/security/CVE-2019-3844	REPORT
	https://ubuntu.com/security/CVE-2019-20386	REPORT
	https://ubuntu.com/security/CVE-2020-1712	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2018-16888",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.0/AV:L/AC:H/PR:L/UI:R/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "low",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2019-20386",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "low",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2020-1712",
              "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": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:16.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "libnss-myhostname",
            "binary_version": "229-4ubuntu21.27"
          },
          {
            "binary_name": "libnss-mymachines",
            "binary_version": "229-4ubuntu21.27"
          },
          {
            "binary_name": "libnss-resolve",
            "binary_version": "229-4ubuntu21.27"
          },
          {
            "binary_name": "libpam-systemd",
            "binary_version": "229-4ubuntu21.27"
          },
          {
            "binary_name": "libsystemd0",
            "binary_version": "229-4ubuntu21.27"
          },
          {
            "binary_name": "libudev1",
            "binary_version": "229-4ubuntu21.27"
          },
          {
            "binary_name": "systemd",
            "binary_version": "229-4ubuntu21.27"
          },
          {
            "binary_name": "systemd-container",
            "binary_version": "229-4ubuntu21.27"
          },
          {
            "binary_name": "systemd-coredump",
            "binary_version": "229-4ubuntu21.27"
          },
          {
            "binary_name": "systemd-journal-remote",
            "binary_version": "229-4ubuntu21.27"
          },
          {
            "binary_name": "systemd-sysv",
            "binary_version": "229-4ubuntu21.27"
          },
          {
            "binary_name": "udev",
            "binary_version": "229-4ubuntu21.27"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:16.04:LTS",
        "name": "systemd",
        "purl": "pkg:deb/ubuntu/systemd@229-4ubuntu21.27?arch=source\u0026distro=xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "229-4ubuntu21.27"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "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",
        "229-4ubuntu21.1",
        "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"
      ]
    },
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2019-3843",
              "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:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "low",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2019-3844",
              "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:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "low",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2019-20386",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "low",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2020-1712",
              "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": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:18.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "libnss-myhostname",
            "binary_version": "237-3ubuntu10.38"
          },
          {
            "binary_name": "libnss-mymachines",
            "binary_version": "237-3ubuntu10.38"
          },
          {
            "binary_name": "libnss-resolve",
            "binary_version": "237-3ubuntu10.38"
          },
          {
            "binary_name": "libnss-systemd",
            "binary_version": "237-3ubuntu10.38"
          },
          {
            "binary_name": "libpam-systemd",
            "binary_version": "237-3ubuntu10.38"
          },
          {
            "binary_name": "libsystemd0",
            "binary_version": "237-3ubuntu10.38"
          },
          {
            "binary_name": "libudev1",
            "binary_version": "237-3ubuntu10.38"
          },
          {
            "binary_name": "systemd",
            "binary_version": "237-3ubuntu10.38"
          },
          {
            "binary_name": "systemd-container",
            "binary_version": "237-3ubuntu10.38"
          },
          {
            "binary_name": "systemd-coredump",
            "binary_version": "237-3ubuntu10.38"
          },
          {
            "binary_name": "systemd-journal-remote",
            "binary_version": "237-3ubuntu10.38"
          },
          {
            "binary_name": "systemd-sysv",
            "binary_version": "237-3ubuntu10.38"
          },
          {
            "binary_name": "systemd-tests",
            "binary_version": "237-3ubuntu10.38"
          },
          {
            "binary_name": "udev",
            "binary_version": "237-3ubuntu10.38"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "systemd",
        "purl": "pkg:deb/ubuntu/systemd@237-3ubuntu10.38?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "237-3ubuntu10.38"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "234-2ubuntu12",
        "235-2ubuntu3",
        "235-3ubuntu2",
        "235-3ubuntu3",
        "237-3ubuntu3",
        "237-3ubuntu4",
        "237-3ubuntu6",
        "237-3ubuntu7",
        "237-3ubuntu8",
        "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"
      ]
    }
  ],
  "aliases": [],
  "details": "It was discovered that systemd incorrectly handled certain PIDFile files.\nA local attacker could possibly use this issue to trick systemd into\nkilling privileged processes. This issue only affected Ubuntu 16.04 LTS.\n(CVE-2018-16888)\n\nIt was discovered that systemd incorrectly handled certain udevadm trigger\ncommands. A local attacker could possibly use this issue to cause systemd\nto consume resources, leading to a denial of service. (CVE-2019-20386)\n\nJann Horn discovered that systemd incorrectly handled services that use the\nDynamicUser property. A local attacker could possibly use this issue to\naccess resources owned by a different service in the future. This issue\nonly affected Ubuntu 18.04 LTS. (CVE-2019-3843, CVE-2019-3844)\n\nTavis Ormandy discovered that systemd incorrectly handled certain Polkit\nqueries. A local attacker could use this issue to cause systemd to crash,\nresulting in a denial of service, or possibly execute arbitrary code and\nescalate privileges. (CVE-2020-1712)\n",
  "id": "USN-4269-1",
  "modified": "2026-04-27T14:11:25Z",
  "published": "2020-02-05T16:39:46Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-4269-1"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2018-16888"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2019-3843"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2019-3844"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2019-20386"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2020-1712"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "summary": "systemd vulnerabilities",
  "upstream": [
    "UBUNTU-CVE-2018-16888",
    "UBUNTU-CVE-2019-3843",
    "UBUNTU-CVE-2019-3844",
    "UBUNTU-CVE-2019-20386",
    "UBUNTU-CVE-2020-1712"
  ]
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

ubuntu-cve-2019-3843

Vulnerability from osv_ubuntu

CVE-2019-3843 (GCVE-0-2019-3843)

usn-4269-1

Vulnerability from osv_ubuntu

Tags

Sightings

Nomenclature