Common Weakness Enumeration

CWE-400

Discouraged

Uncontrolled Resource Consumption

Abstraction: Class · Status: Draft

The product does not properly control the allocation and maintenance of a limited resource.

5477 vulnerabilities reference this CWE, most recent first.

GHSA-8G7P-XH7P-947J

Vulnerability from github – Published: 2025-05-14 15:31 – Updated: 2025-08-27 15:33
VLAI
Details

In Progress® Telerik® UI for AJAX, versions 2011.2.712 to 2025.1.218, an unsafe reflection vulnerability exists that may lead to an unhandled exception resulting in a crash of the hosting process and denial of service.

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2025-3600"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-400",
      "CWE-470"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-05-14T14:15:29Z",
    "severity": "HIGH"
  },
  "details": "In Progress\u00ae Telerik\u00ae UI for AJAX, versions 2011.2.712 to 2025.1.218, an unsafe reflection vulnerability exists that may lead to an unhandled exception resulting in a crash of the hosting process and denial of service.",
  "id": "GHSA-8g7p-xh7p-947j",
  "modified": "2025-08-27T15:33:13Z",
  "published": "2025-05-14T15:31:38Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-3600"
    },
    {
      "type": "WEB",
      "url": "https://www.telerik.com/products/aspnet-ajax/documentation/knowledge-base/kb-security-unsafe-reflection-cve-2025-3600"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-8G84-36XH-VRJ9

Vulnerability from github – Published: 2022-05-17 00:26 – Updated: 2022-05-17 00:26
VLAI
Details

Red Hat CloudForms 3 Management Engine (CFME) allows remote authenticated users to cause a denial of service (resource consumption) via vectors involving calls to the .to_sym rails function and lack of garbage collection of inserted symbols.

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2014-7813"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-400"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2017-10-18T14:29:00Z",
    "severity": "MODERATE"
  },
  "details": "Red Hat CloudForms 3 Management Engine (CFME) allows remote authenticated users to cause a denial of service (resource consumption) via vectors involving calls to the .to_sym rails function and lack of garbage collection of inserted symbols.",
  "id": "GHSA-8g84-36xh-vrj9",
  "modified": "2022-05-17T00:26:05Z",
  "published": "2022-05-17T00:26:05Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2014-7813"
    },
    {
      "type": "WEB",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1157872"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-8G85-WHQH-CR2F

Vulnerability from github – Published: 2023-12-05 18:12 – Updated: 2024-11-19 16:25
VLAI
Summary
Traefik vulnerable to potential DDoS via ACME HTTPChallenge
Details

Impact

There is a potential vulnerability in Traefik managing the ACME HTTP challenge.

When Traefik is configured to use the HTTPChallenge to generate and renew the Let's Encrypt TLS certificates, the delay authorized to solve the challenge (50 seconds) can be exploited by attackers (slowloris attack).

Patches

  • https://github.com/traefik/traefik/releases/tag/v2.10.6
  • https://github.com/traefik/traefik/releases/tag/v3.0.0-beta5

Workarounds

Replace the HTTPChallenge with the TLSChallenge or the DNSChallenge.

For more information

If you have any questions or comments about this advisory, please open an issue.

Show details on source website

{
  "affected": [
    {
      "package": {
        "ecosystem": "Go",
        "name": "github.com/traefik/traefik/v2"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.10.6"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Go",
        "name": "github.com/traefik/traefik/v3"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.0.0-beta5"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2023-47124"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-400",
      "CWE-772"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2023-12-05T18:12:37Z",
    "nvd_published_at": "2023-12-04T21:15:33Z",
    "severity": "MODERATE"
  },
  "details": "## Impact\n\nThere is a potential vulnerability in Traefik managing the ACME HTTP challenge.\n\nWhen Traefik is configured to use the [HTTPChallenge](https://doc.traefik.io/traefik/https/acme/#httpchallenge) to generate and renew the Let\u0027s Encrypt TLS certificates, the delay authorized to solve the challenge (50 seconds) can be exploited by attackers ([slowloris attack](https://www.cloudflare.com/learning/ddos/ddos-attack-tools/slowloris/)).\n \n## Patches\n\n- https://github.com/traefik/traefik/releases/tag/v2.10.6\n- https://github.com/traefik/traefik/releases/tag/v3.0.0-beta5\n\n## Workarounds\n\nReplace the HTTPChallenge with the [TLSChallenge](https://doc.traefik.io/traefik/https/acme/#tlschallenge) or the [DNSChallenge](https://doc.traefik.io/traefik/https/acme/#dnschallenge).\n\n## For more information\n\nIf you have any questions or comments about this advisory, please [open an issue](https://github.com/traefik/traefik/issues).",
  "id": "GHSA-8g85-whqh-cr2f",
  "modified": "2024-11-19T16:25:35Z",
  "published": "2023-12-05T18:12:37Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/traefik/traefik/security/advisories/GHSA-8g85-whqh-cr2f"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-47124"
    },
    {
      "type": "WEB",
      "url": "https://doc.traefik.io/traefik/https/acme/#dnschallenge"
    },
    {
      "type": "WEB",
      "url": "https://doc.traefik.io/traefik/https/acme/#httpchallenge"
    },
    {
      "type": "WEB",
      "url": "https://doc.traefik.io/traefik/https/acme/#tlschallenge"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/traefik/traefik"
    },
    {
      "type": "WEB",
      "url": "https://github.com/traefik/traefik/releases/tag/v2.10.6"
    },
    {
      "type": "WEB",
      "url": "https://github.com/traefik/traefik/releases/tag/v3.0.0-beta5"
    },
    {
      "type": "WEB",
      "url": "https://www.cloudflare.com/learning/ddos/ddos-attack-tools/slowloris"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Traefik vulnerable to potential DDoS via ACME HTTPChallenge"
}

GHSA-8G8J-64GV-V6CH

Vulnerability from github – Published: 2022-05-14 01:41 – Updated: 2022-05-14 01:41
VLAI
Details

There is an attempted excessive memory allocation at libxsmm_sparse_csc_reader in generator_spgemm_csc_reader.c in LIBXSMM 1.10 that will cause a denial of service.

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2018-20543"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-400"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2018-12-28T16:29:00Z",
    "severity": "MODERATE"
  },
  "details": "There is an attempted excessive memory allocation at libxsmm_sparse_csc_reader in generator_spgemm_csc_reader.c in LIBXSMM 1.10 that will cause a denial of service.",
  "id": "GHSA-8g8j-64gv-v6ch",
  "modified": "2022-05-14T01:41:35Z",
  "published": "2022-05-14T01:41:35Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2018-20543"
    },
    {
      "type": "WEB",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1652634"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-8G92-F59V-J999

Vulnerability from github – Published: 2024-07-13 03:30 – Updated: 2026-03-09 21:31
VLAI
Details

A flaw was found in OpenJPEG. A resource exhaustion can occur in the opj_t1_decode_cblks function in tcd.c through a crafted image file, causing a denial of service.

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2023-39329"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-400"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-07-13T03:15:09Z",
    "severity": "MODERATE"
  },
  "details": "A flaw was found in OpenJPEG. A resource exhaustion can occur in the opj_t1_decode_cblks function in tcd.c through a crafted image file, causing a denial of service.",
  "id": "GHSA-8g92-f59v-j999",
  "modified": "2026-03-09T21:31:32Z",
  "published": "2024-07-13T03:30:37Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-39329"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:4128"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/security/cve/CVE-2023-39329"
    },
    {
      "type": "WEB",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2295816"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-8G9H-PMC4-WCR4

Vulnerability from github – Published: 2022-05-02 03:36 – Updated: 2025-04-23 18:30
VLAI
Details

The web browser on the Sony PLAYSTATION 3 (PS3) allows remote attackers to cause a denial of service (memory consumption and console hang) via a large integer value for the length property of a Select object, a related issue to CVE-2009-1692.

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2009-2541"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-400"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2009-07-20T18:30:00Z",
    "severity": "HIGH"
  },
  "details": "The web browser on the Sony PLAYSTATION 3 (PS3) allows remote attackers to cause a denial of service (memory consumption and console hang) via a large integer value for the length property of a Select object, a related issue to CVE-2009-1692.",
  "id": "GHSA-8g9h-pmc4-wcr4",
  "modified": "2025-04-23T18:30:35Z",
  "published": "2022-05-02T03:36:10Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2009-2541"
    },
    {
      "type": "WEB",
      "url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/52875"
    },
    {
      "type": "WEB",
      "url": "http://www.exploit-db.com/exploits/9160"
    },
    {
      "type": "WEB",
      "url": "http://www.g-sec.lu/one-bug-to-rule-them-all.html"
    },
    {
      "type": "WEB",
      "url": "http://www.securityfocus.com/archive/1/504969/100/0/threaded"
    },
    {
      "type": "WEB",
      "url": "http://www.securityfocus.com/archive/1/504988/100/0/threaded"
    },
    {
      "type": "WEB",
      "url": "http://www.securityfocus.com/archive/1/504989/100/0/threaded"
    },
    {
      "type": "WEB",
      "url": "http://www.securityfocus.com/archive/1/505006/100/0/threaded"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-8GG3-QVW7-QMGM

Vulnerability from github – Published: 2023-04-15 21:30 – Updated: 2024-04-04 03:29
VLAI
Details

In OpenBMC 2.9, crafted IPMI messages allow an attacker to cause a denial of service to the BMC via the netipmid (IPMI lan+) interface.

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2021-39295"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-400"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2023-04-15T20:16:00Z",
    "severity": "HIGH"
  },
  "details": "In OpenBMC 2.9, crafted IPMI messages allow an attacker to cause a denial of service to the BMC via the netipmid (IPMI lan+) interface.",
  "id": "GHSA-8gg3-qvw7-qmgm",
  "modified": "2024-04-04T03:29:14Z",
  "published": "2023-04-15T21:30:16Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/google/security-research/security/advisories/GHSA-gg9x-v835-m48q"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-39295"
    },
    {
      "type": "WEB",
      "url": "https://github.com/openbmc/openbmc/issues/3811"
    },
    {
      "type": "WEB",
      "url": "https://github.com/openbmc/docs/blob/master/release/release-notes.md"
    },
    {
      "type": "WEB",
      "url": "https://github.com/openbmc/openbmc"
    },
    {
      "type": "WEB",
      "url": "https://openbmc.org"
    },
    {
      "type": "WEB",
      "url": "https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00737.html"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-8GG8-WR4J-V2WR

Vulnerability from github – Published: 2023-03-22 21:30 – Updated: 2025-02-26 21:43
VLAI
Summary
Gophish vulnerable to Denial of Service via crafted payload involving autofocus
Details

Gophish through 0.12.1 allows attackers to cause a Denial of Service (DoS) via a crafted payload involving autofocus.

Show details on source website

{
  "affected": [
    {
      "package": {
        "ecosystem": "Go",
        "name": "github.com/gophish/gophish"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "0.12.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2022-45003"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-400"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2023-03-22T22:22:07Z",
    "nvd_published_at": "2023-03-22T21:15:00Z",
    "severity": "HIGH"
  },
  "details": "Gophish through 0.12.1 allows attackers to cause a Denial of Service (DoS) via a crafted payload involving autofocus.",
  "id": "GHSA-8gg8-wr4j-v2wr",
  "modified": "2025-02-26T21:43:09Z",
  "published": "2023-03-22T21:30:16Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-45003"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/gophish/gophish"
    },
    {
      "type": "WEB",
      "url": "https://github.com/gophish/gophish/releases/tag/v0.12.1"
    },
    {
      "type": "WEB",
      "url": "https://pastebin.com/z5MD3z8c"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Gophish vulnerable to Denial of Service via crafted payload involving autofocus"
}

GHSA-8GH5-V944-CPHH

Vulnerability from github – Published: 2023-09-01 12:30 – Updated: 2024-04-04 07:21
VLAI
Details

An issue has been discovered in GitLab affecting all versions starting from 15.11 before 16.1.5, all versions starting from 16.2 before 16.2.5, all versions starting from 16.3 before 16.3.1. An authenticated user could trigger a denial of service when importing or cloning malicious content.

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2023-3205"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-1333",
      "CWE-400"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2023-09-01T11:15:41Z",
    "severity": "MODERATE"
  },
  "details": "An issue has been discovered in GitLab affecting all versions starting from 15.11 before 16.1.5, all versions starting from 16.2 before 16.2.5, all versions starting from 16.3 before 16.3.1. An authenticated user could trigger a denial of service when importing or cloning malicious content.",
  "id": "GHSA-8gh5-v944-cphh",
  "modified": "2024-04-04T07:21:16Z",
  "published": "2023-09-01T12:30:44Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-3205"
    },
    {
      "type": "WEB",
      "url": "https://hackerone.com/reports/2011464"
    },
    {
      "type": "WEB",
      "url": "https://gitlab.com/gitlab-org/gitlab/-/issues/415067"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-8GHJ-P4VJ-MR35

Vulnerability from github – Published: 2023-11-03 06:36 – Updated: 2024-10-14 21:20
VLAI
Summary
Pillow Denial of Service vulnerability
Details

An issue was discovered in Pillow before 10.0.0. It is a Denial of Service that uncontrollably allocates memory to process a given task, potentially causing a service to crash by having it run out of memory. This occurs for truetype in ImageFont when textlength in an ImageDraw instance operates on a long text argument.

Show details on source website

{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "pillow"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "10.0.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2023-44271"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-400",
      "CWE-770"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2023-11-03T19:39:43Z",
    "nvd_published_at": "2023-11-03T05:15:30Z",
    "severity": "HIGH"
  },
  "details": "An issue was discovered in Pillow before 10.0.0. It is a Denial of Service that uncontrollably allocates memory to process a given task, potentially causing a service to crash by having it run out of memory. This occurs for truetype in ImageFont when textlength in an ImageDraw instance operates on a long text argument.",
  "id": "GHSA-8ghj-p4vj-mr35",
  "modified": "2024-10-14T21:20:48Z",
  "published": "2023-11-03T06:36:30Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-44271"
    },
    {
      "type": "WEB",
      "url": "https://github.com/python-pillow/Pillow/pull/7244"
    },
    {
      "type": "WEB",
      "url": "https://github.com/python-pillow/Pillow/commit/1fe1bb49c452b0318cad12ea9d97c3bef188e9a7"
    },
    {
      "type": "WEB",
      "url": "https://devhub.checkmarx.com/cve-details/CVE-2023-44271"
    },
    {
      "type": "WEB",
      "url": "https://github.com/pypa/advisory-database/tree/main/vulns/pillow/PYSEC-2023-227.yaml"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/python-pillow/Pillow"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2024/03/msg00021.html"
    },
    {
      "type": "WEB",
      "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/N2JOEDUJDQLCUII2LQYZYSM7RJL2I3P4"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Pillow Denial of Service vulnerability"
}

Mitigation
Architecture and Design

Design throttling mechanisms into the system architecture. The best protection is to limit the amount of resources that an unauthorized user can cause to be expended. A strong authentication and access control model will help prevent such attacks from occurring in the first place. The login application should be protected against DoS attacks as much as possible. Limiting the database access, perhaps by caching result sets, can help minimize the resources expended. To further limit the potential for a DoS attack, consider tracking the rate of requests received from users and blocking requests that exceed a defined rate threshold.

Mitigation
Architecture and Design
  • Mitigation of resource exhaustion attacks requires that the target system either:
  • The first of these solutions is an issue in itself though, since it may allow attackers to prevent the use of the system by a particular valid user. If the attacker impersonates the valid user, they may be able to prevent the user from accessing the server in question.
  • The second solution is simply difficult to effectively institute -- and even when properly done, it does not provide a full solution. It simply makes the attack require more resources on the part of the attacker.
  • recognizes the attack and denies that user further access for a given amount of time, or
  • uniformly throttles all requests in order to make it more difficult to consume resources more quickly than they can again be freed.
Mitigation
Architecture and Design

Ensure that protocols have specific limits of scale placed on them.

Mitigation
Implementation

Ensure that all failures in resource allocation place the system into a safe posture.

CAPEC-147: XML Ping of the Death

An attacker initiates a resource depletion attack where a large number of small XML messages are delivered at a sufficiently rapid rate to cause a denial of service or crash of the target. Transactions such as repetitive SOAP transactions can deplete resources faster than a simple flooding attack because of the additional resources used by the SOAP protocol and the resources necessary to process SOAP messages. The transactions used are immaterial as long as they cause resource utilization on the target. In other words, this is a normal flooding attack augmented by using messages that will require extra processing on the target.

CAPEC-227: Sustained Client Engagement

An adversary attempts to deny legitimate users access to a resource by continually engaging a specific resource in an attempt to keep the resource tied up as long as possible. The adversary's primary goal is not to crash or flood the target, which would alert defenders; rather it is to repeatedly perform actions or abuse algorithmic flaws such that a given resource is tied up and not available to a legitimate user. By carefully crafting a requests that keep the resource engaged through what is seemingly benign requests, legitimate users are limited or completely denied access to the resource.

CAPEC-492: Regular Expression Exponential Blowup

An adversary may execute an attack on a program that uses a poor Regular Expression(Regex) implementation by choosing input that results in an extreme situation for the Regex. A typical extreme situation operates at exponential time compared to the input size. This is due to most implementations using a Nondeterministic Finite Automaton(NFA) state machine to be built by the Regex algorithm since NFA allows backtracking and thus more complex regular expressions.