Vulnerability-Lookup

CVE-2022-2929 (GCVE-0-2022-2929)

Vulnerability from cvelistv5 – Published: 2022-10-07 04:45 – Updated: 2024-09-16 18:28

Title

DHCP memory leak

Summary

In ISC DHCP 1.0 -> 4.4.3, ISC DHCP 4.1-ESV-R1 -> 4.1-ESV-R16-P1 a system with access to a DHCP server, sending DHCP packets crafted to include fqdn labels longer than 63 bytes, could eventually cause the server to run out of memory.

Severity

6.5 (Medium)


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

CWE

The function fqdn_universe_decode() allocates buffer space for the contents of option 81 (fqdn) data received in a DHCP packet. The maximum length of a DNS label is 63 bytes. The function tests the length byte of each label contained in the fqdn; if it finds a label whose length byte value is larger than 63, it returns without dereferencing the buffer space. This will cause a memory leak. Affects In ISC DHCP 1.0 -> 4.4.3, ISC DHCP 4.1-ESV-R1 -> 4.1-ESV-R16-P1

Assigner

isc mitre root

References

6 references

URL	Tags
https://kb.isc.org/docs/cve-2022-2929
https://lists.debian.org/debian-lts-announce/2022…	mailing-list
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisory
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisory
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisory
https://security.gentoo.org/glsa/202305-22	vendor-advisory

Impacted products

1 product

Vendor	Product	Version	CPE status
ISC	ISC DHCP	Affected: 1.0 through versions before 4.1-ESV-R16-P2 Affected: 4.2 through versions before 4.4.3.-P1	guessed

Date Public

2022-10-05 00:00

Credits

ISC would like to thank VictorV of Cyber Kunlun Lab for discovering and reporting this issue.

Show details on NVD website

JSON

To clipboard

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        ],
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        "lastModified": "2026-06-17T04:42:50.300",
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      "cve": "CVE-2022-2929",
      "id": "CVE-2022-2929",
      "initial_release_date": "2022-10-05T00:00:00+00:00",
      "product_status:fixed": "83",
      "product_status:known_affected": "11",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "dhcp: DHCP memory leak",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2022/cve-2022-2929.json",
      "version": "3"
    },
    "suse_vex": {
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      "current_release_date": "2026-09-12T17:14:37Z",
      "cve": "CVE-2022-2929",
      "id": "CVE-2022-2929",
      "initial_release_date": "2023-02-15T03:32:12Z",
      "product_status:known_affected": "406",
      "product_status:recommended": "295",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2022-2929",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2022-2929.json",
      "version": "49"
    }
  }
}

UBUNTU-CVE-2022-2929 (CVE-2022-2929)

Vulnerability from osv_ubuntu – Published: 2022-10-05 00:00 – Updated: 2026-04-22 07:41 – Source website

Details

Severity

6.5 (Medium)


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

6.5 (Medium)


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

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2022-2929	REPORT
	https://lists.isc.org/pipermail/dhcp-announce/202…	REPORT
	https://kb.isc.org/docs/cve-2022-2929	REPORT
	https://ubuntu.com/security/notices/USN-5658-1	ADVISORY
	https://ubuntu.com/security/notices/USN-5658-2	ADVISORY
	https://ubuntu.com/security/notices/USN-5658-3	ADVISORY
	https://www.cve.org/CVERecord?id=CVE-2022-2929	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "isc-dhcp-client",
            "binary_version": "4.2.4-7ubuntu12.13+esm2"
          },
          {
            "binary_name": "isc-dhcp-client-noddns",
            "binary_version": "4.2.4-7ubuntu12.13+esm2"
          },
          {
            "binary_name": "isc-dhcp-common",
            "binary_version": "4.2.4-7ubuntu12.13+esm2"
          },
          {
            "binary_name": "isc-dhcp-relay",
            "binary_version": "4.2.4-7ubuntu12.13+esm2"
          },
          {
            "binary_name": "isc-dhcp-server",
            "binary_version": "4.2.4-7ubuntu12.13+esm2"
          },
          {
            "binary_name": "isc-dhcp-server-ldap",
            "binary_version": "4.2.4-7ubuntu12.13+esm2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:14.04:LTS",
        "name": "isc-dhcp",
        "purl": "pkg:deb/ubuntu/isc-dhcp@4.2.4-7ubuntu12.13+esm2?arch=source\u0026distro=trusty/esm"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "4.2.4-7ubuntu12.13+esm2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "4.2.4-7ubuntu8",
        "4.2.4-7ubuntu9",
        "4.2.4-7ubuntu10",
        "4.2.4-7ubuntu11",
        "4.2.4-7ubuntu12",
        "4.2.4-7ubuntu12.1",
        "4.2.4-7ubuntu12.2",
        "4.2.4-7ubuntu12.3",
        "4.2.4-7ubuntu12.4",
        "4.2.4-7ubuntu12.5",
        "4.2.4-7ubuntu12.6",
        "4.2.4-7ubuntu12.7",
        "4.2.4-7ubuntu12.8",
        "4.2.4-7ubuntu12.9",
        "4.2.4-7ubuntu12.10",
        "4.2.4-7ubuntu12.12",
        "4.2.4-7ubuntu12.13",
        "4.2.4-7ubuntu12.13+esm1"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "isc-dhcp-client",
            "binary_version": "4.3.3-5ubuntu12.10+esm2"
          },
          {
            "binary_name": "isc-dhcp-client-ddns",
            "binary_version": "4.3.3-5ubuntu12.10+esm2"
          },
          {
            "binary_name": "isc-dhcp-common",
            "binary_version": "4.3.3-5ubuntu12.10+esm2"
          },
          {
            "binary_name": "isc-dhcp-relay",
            "binary_version": "4.3.3-5ubuntu12.10+esm2"
          },
          {
            "binary_name": "isc-dhcp-server",
            "binary_version": "4.3.3-5ubuntu12.10+esm2"
          },
          {
            "binary_name": "isc-dhcp-server-ldap",
            "binary_version": "4.3.3-5ubuntu12.10+esm2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:16.04:LTS",
        "name": "isc-dhcp",
        "purl": "pkg:deb/ubuntu/isc-dhcp@4.3.3-5ubuntu12.10+esm2?arch=source\u0026distro=esm-infra/xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "4.3.3-5ubuntu12.10+esm2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "4.3.1-5ubuntu3",
        "4.3.1-5ubuntu4",
        "4.3.1-5ubuntu5",
        "4.3.3-5ubuntu1",
        "4.3.3-5ubuntu2",
        "4.3.3-5ubuntu4",
        "4.3.3-5ubuntu5",
        "4.3.3-5ubuntu7",
        "4.3.3-5ubuntu8",
        "4.3.3-5ubuntu9",
        "4.3.3-5ubuntu10",
        "4.3.3-5ubuntu11",
        "4.3.3-5ubuntu12",
        "4.3.3-5ubuntu12.1",
        "4.3.3-5ubuntu12.3",
        "4.3.3-5ubuntu12.4",
        "4.3.3-5ubuntu12.6",
        "4.3.3-5ubuntu12.7",
        "4.3.3-5ubuntu12.9",
        "4.3.3-5ubuntu12.10",
        "4.3.3-5ubuntu12.10+esm1"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "isc-dhcp-client",
            "binary_version": "4.3.5-3ubuntu7.4"
          },
          {
            "binary_name": "isc-dhcp-client-ddns",
            "binary_version": "4.3.5-3ubuntu7.4"
          },
          {
            "binary_name": "isc-dhcp-common",
            "binary_version": "4.3.5-3ubuntu7.4"
          },
          {
            "binary_name": "isc-dhcp-relay",
            "binary_version": "4.3.5-3ubuntu7.4"
          },
          {
            "binary_name": "isc-dhcp-server",
            "binary_version": "4.3.5-3ubuntu7.4"
          },
          {
            "binary_name": "isc-dhcp-server-ldap",
            "binary_version": "4.3.5-3ubuntu7.4"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "isc-dhcp",
        "purl": "pkg:deb/ubuntu/isc-dhcp@4.3.5-3ubuntu7.4?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "4.3.5-3ubuntu7.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "4.3.5-3ubuntu2",
        "4.3.5-3ubuntu3",
        "4.3.5-3ubuntu4",
        "4.3.5-3ubuntu5",
        "4.3.5-3ubuntu6",
        "4.3.5-3ubuntu7",
        "4.3.5-3ubuntu7.1",
        "4.3.5-3ubuntu7.2",
        "4.3.5-3ubuntu7.3"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "isc-dhcp-client",
            "binary_version": "4.4.1-2.1ubuntu5.20.04.4"
          },
          {
            "binary_name": "isc-dhcp-client-ddns",
            "binary_version": "4.4.1-2.1ubuntu5.20.04.4"
          },
          {
            "binary_name": "isc-dhcp-common",
            "binary_version": "4.4.1-2.1ubuntu5.20.04.4"
          },
          {
            "binary_name": "isc-dhcp-relay",
            "binary_version": "4.4.1-2.1ubuntu5.20.04.4"
          },
          {
            "binary_name": "isc-dhcp-server",
            "binary_version": "4.4.1-2.1ubuntu5.20.04.4"
          },
          {
            "binary_name": "isc-dhcp-server-ldap",
            "binary_version": "4.4.1-2.1ubuntu5.20.04.4"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "isc-dhcp",
        "purl": "pkg:deb/ubuntu/isc-dhcp@4.4.1-2.1ubuntu5.20.04.4?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "4.4.1-2.1ubuntu5.20.04.4"
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          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "4.4.1-2ubuntu5",
        "4.4.1-2ubuntu6",
        "4.4.1-2.1ubuntu1",
        "4.4.1-2.1ubuntu2",
        "4.4.1-2.1ubuntu3",
        "4.4.1-2.1ubuntu4",
        "4.4.1-2.1ubuntu5",
        "4.4.1-2.1ubuntu5.20.04.1",
        "4.4.1-2.1ubuntu5.20.04.2",
        "4.4.1-2.1ubuntu5.20.04.3"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "isc-dhcp-client",
            "binary_version": "4.4.1-2.3ubuntu2.3"
          },
          {
            "binary_name": "isc-dhcp-client-ddns",
            "binary_version": "4.4.1-2.3ubuntu2.3"
          },
          {
            "binary_name": "isc-dhcp-common",
            "binary_version": "4.4.1-2.3ubuntu2.3"
          },
          {
            "binary_name": "isc-dhcp-relay",
            "binary_version": "4.4.1-2.3ubuntu2.3"
          },
          {
            "binary_name": "isc-dhcp-server",
            "binary_version": "4.4.1-2.3ubuntu2.3"
          },
          {
            "binary_name": "isc-dhcp-server-ldap",
            "binary_version": "4.4.1-2.3ubuntu2.3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "isc-dhcp",
        "purl": "pkg:deb/ubuntu/isc-dhcp@4.4.1-2.3ubuntu2.3?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "4.4.1-2.3ubuntu2.3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "4.4.1-2.3ubuntu1",
        "4.4.1-2.3ubuntu2",
        "4.4.1-2.3ubuntu2.1",
        "4.4.1-2.3ubuntu2.2"
      ]
    }
  ],
  "aliases": [],
  "details": "In ISC DHCP 1.0 -\u003e 4.4.3, ISC DHCP 4.1-ESV-R1 -\u003e 4.1-ESV-R16-P1 a system with access to a DHCP server, sending DHCP packets crafted to include fqdn labels longer than 63 bytes, could eventually cause the server to run out of memory.",
  "id": "UBUNTU-CVE-2022-2929",
  "modified": "2026-04-22T07:41:16Z",
  "published": "2022-10-05T00:00:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2022-2929"
    },
    {
      "type": "REPORT",
      "url": "https://lists.isc.org/pipermail/dhcp-announce/2022-October/000437.html"
    },
    {
      "type": "REPORT",
      "url": "https://kb.isc.org/docs/cve-2022-2929"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-5658-1"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-5658-2"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-5658-3"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2022-2929"
    }
  ],
  "related": [
    "USN-5658-1",
    "USN-5658-2",
    "USN-5658-3"
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2022-2929"
  ]
}

WID-SEC-W-2022-1634

Vulnerability from csaf_certbund - Published: 2022-10-05 22:00 - Updated: 2023-07-23 22:00

Summary

Internet Systems Consortium DHCP: Mehrere Schwachstellen ermöglichen Denial of Service

Severity

Mittel

Scope

2 vulnerabilities in this advisory, including CVE-2022-2929.

CVE-2022-2929

Es existiert eine Schwachstelle in Internet Systems Consortium DHCP. Bei der Verarbeitung von DHCP-Paketen mit DNS-Bezeichnungen kommt es in der qdn_universe_decode() Funktion unter bestimmten Umständen zu einem Speicherfehler. Ein Angreifer aus dem Angrenzenden Netzwerk kann diese Schwachstelle ausnutzen, um einen Denial of Service zu verursachen.

Known affected: 10 products

Open the full advisory

WID-SEC-W-2023-1424

Vulnerability from csaf_certbund - Published: 2023-06-12 22:00 - Updated: 2025-10-06 22:00

Summary

Xerox FreeFlow Print Server für Solaris: Mehrere Schwachstellen

Severity

Hoch

Scope

195 vulnerabilities in this advisory, including CVE-2022-2929.

CVE-2022-2929

Known affected: 2 products

Open the full advisory

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

CVE-2022-2929 (GCVE-0-2022-2929)

UBUNTU-CVE-2022-2929 (CVE-2022-2929)

WID-SEC-W-2022-1634

WID-SEC-W-2023-1424

Tags

Sightings

Nomenclature

Related by attack behaviour