github - ghsa-h3j8-24jg-q44j

GHSA-H3J8-24JG-Q44J

Vulnerability from github – Published: 2022-05-13 01:32 – Updated: 2022-05-13 01:32

Details

An extension to hooks capabilities which debuted in Kea 1.4.0 introduced a memory leak for operators who are using certain hooks library facilities. In order to support multiple requests simultaneously, Kea 1.4 added a callout handle store but unfortunately the initial implementation of this store does not properly free memory in every case. Hooks which make use of query4 or query6 parameters in their callouts can leak memory, resulting in the eventual exhaustion of available memory and subsequent failure of the server process. Affects Kea DHCP 1.4.0.

Severity ?

7.5 (High)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2018-5739"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-772"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2019-01-16T20:29:00Z",
    "severity": "HIGH"
  },
  "details": "An extension to hooks capabilities which debuted in Kea 1.4.0 introduced a memory leak for operators who are using certain hooks library facilities. In order to support multiple requests simultaneously, Kea 1.4 added a callout handle store but unfortunately the initial implementation of this store does not properly free memory in every case. Hooks which make use of query4 or query6 parameters in their callouts can leak memory, resulting in the eventual exhaustion of available memory and subsequent failure of the server process. Affects Kea DHCP 1.4.0.",
  "id": "GHSA-h3j8-24jg-q44j",
  "modified": "2022-05-13T01:32:04Z",
  "published": "2022-05-13T01:32:04Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2018-5739"
    },
    {
      "type": "WEB",
      "url": "https://kb.isc.org/docs/aa-01626"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2018-5739 (GCVE-0-2018-5739)

Vulnerability from cvelistv5 – Published: 2019-01-16 20:00 – Updated: 2024-09-17 02:11

Summary

Severity ?

6.5 (Medium)


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

CWE

Only servers using hooks which make use of the callout handle store are affected. A Kea server which is using one or more hooks libraries that exhibit this problem will increase its memory use over time, with the rate of increase being proportional to the amount of DHCP traffic processed. Eventually, due to uncontrolled growth, the server will either exhaust all system memory or, if the administrator has set a per-process memory limit, will hit that limit, after which point further memory allocations will fail and the Kea server will crash. An attacker who is within the broadcast domain of the Kea server or in a network which is permitted to relay DHCP traffic to the Kea server can hasten the arrival of this outcome by deliberately sending a large volume of requests to the Kea server. Ability to deliberately trigger this vulnerability depends on the hooks libraries used and the hook points used for callouts. Our scoring for this vulnerability is based on the hook points used for hook libraries distributed by ISC and also based on the assumption that the Kea server does not accept arbitrary traffic from the internet (but is protected, e.g. by firewall, and only accepts DHCP traffic from the local broadcast domain and from nearby networks via authorized DHCP relay agents.) We cannot score every combination, but the risk could be higher to custom-developed hook libraries using other hook points or to servers which accept arbitrary DHCP traffic without restriction.

Assigner

isc

References

URL

Tags

https://kb.isc.org/docs/aa-01626

x_refsource_CONFIRM

Impacted products

	Vendor	Product	Version
	ISC	Kea DHCP	Affected: Kea DHCP 1.4.0

Show details on NVD website

JSON

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        "providerMetadata": {
          "dateUpdated": "2024-08-05T05:40:51.272Z",
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Sightings

Author	Source	Type	Date

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

GHSA-H3J8-24JG-Q44J

CVE-2018-5739 (GCVE-0-2018-5739)

Tags

Sightings

Nomenclature