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.

5486 vulnerabilities reference this CWE, most recent first.

GHSA-HV89-W63P-3MF5

Vulnerability from github – Published: 2022-05-24 17:29 – Updated: 2023-05-22 21:30
VLAI
Details

A vulnerability in the WLAN Local Profiling feature of Cisco IOS XE Wireless Controller Software for the Cisco Catalyst 9000 Family could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability is due to incorrect parsing of HTTP packets while performing HTTP-based endpoint device classifications. An attacker could exploit this vulnerability by sending a crafted HTTP packet to an affected device. A successful exploit could cause an affected device to reboot, resulting in a DoS condition.

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2020-3428"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-20",
      "CWE-400"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2020-09-24T18:15:00Z",
    "severity": "MODERATE"
  },
  "details": "A vulnerability in the WLAN Local Profiling feature of Cisco IOS XE Wireless Controller Software for the Cisco Catalyst 9000 Family could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability is due to incorrect parsing of HTTP packets while performing HTTP-based endpoint device classifications. An attacker could exploit this vulnerability by sending a crafted HTTP packet to an affected device. A successful exploit could cause an affected device to reboot, resulting in a DoS condition.",
  "id": "GHSA-hv89-w63p-3mf5",
  "modified": "2023-05-22T21:30:17Z",
  "published": "2022-05-24T17:29:27Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2020-3428"
    },
    {
      "type": "WEB",
      "url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-dclass-dos-VKh9D8k3"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-HVCG-52HQ-RGF5

Vulnerability from github – Published: 2022-05-17 02:26 – Updated: 2022-05-17 02:26
VLAI
Details

An issue was discovered in certain Apple products. iOS before 10.3.3 is affected. The issue involves the "EventKitUI" component. It allows remote attackers to cause a denial of service (resource consumption and application crash).

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2017-7007"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-400"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2017-07-20T16:29:00Z",
    "severity": "HIGH"
  },
  "details": "An issue was discovered in certain Apple products. iOS before 10.3.3 is affected. The issue involves the \"EventKitUI\" component. It allows remote attackers to cause a denial of service (resource consumption and application crash).",
  "id": "GHSA-hvcg-52hq-rgf5",
  "modified": "2022-05-17T02:26:55Z",
  "published": "2022-05-17T02:26:55Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2017-7007"
    },
    {
      "type": "WEB",
      "url": "https://support.apple.com/HT207923"
    },
    {
      "type": "WEB",
      "url": "http://www.securityfocus.com/bid/99891"
    },
    {
      "type": "WEB",
      "url": "http://www.securitytracker.com/id/1038950"
    }
  ],
  "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"
    }
  ]
}

GHSA-HVJM-8776-HW2Q

Vulnerability from github – Published: 2022-10-01 00:00 – Updated: 2022-10-04 00:00
VLAI
Details

An issue was discovered in Xpdf 4.04. There is a crash in XRef::fetch(int, int, Object*, int) in xpdf/XRef.cc, a different vulnerability than CVE-2018-16369 and CVE-2019-16088.

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2022-41844"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-400",
      "CWE-787"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2022-09-30T05:15:00Z",
    "severity": "MODERATE"
  },
  "details": "An issue was discovered in Xpdf 4.04. There is a crash in XRef::fetch(int, int, Object*, int) in xpdf/XRef.cc, a different vulnerability than CVE-2018-16369 and CVE-2019-16088.",
  "id": "GHSA-hvjm-8776-hw2q",
  "modified": "2022-10-04T00:00:19Z",
  "published": "2022-10-01T00:00:25Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-41844"
    },
    {
      "type": "WEB",
      "url": "https://forum.xpdfreader.com/viewtopic.php?f=1\u0026t=42340\u0026p=43928\u0026hilit=gfseek#p43928"
    },
    {
      "type": "WEB",
      "url": "https://forum.xpdfreader.com/viewtopic.php?f=3\u0026t=42308\u0026p=43844\u0026hilit=XRef%3A%3Afetch#p43844"
    },
    {
      "type": "WEB",
      "url": "http://www.xpdfreader.com/download.html"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-HVQC-PC78-X9WH

Vulnerability from github – Published: 2021-08-25 20:53 – Updated: 2023-06-13 20:30
VLAI
Summary
Soundness issue in raw-cpuid
Details

VendorInfo::as_string(), SoCVendorBrand::as_string(), and ExtendedFunctionInfo::processor_brand_string() construct byte slices using std::slice::from_raw_parts(), with data coming from #[repr(Rust)] structs. This is always undefined behavior. This flaw has been fixed in v9.0.0, by making the relevant structs #[repr(C)].

Show details on source website

{
  "affected": [
    {
      "package": {
        "ecosystem": "crates.io",
        "name": "raw-cpuid"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "9.0.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2021-26306"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-198",
      "CWE-400"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2021-08-19T18:02:19Z",
    "nvd_published_at": "2021-01-29T03:15:00Z",
    "severity": "HIGH"
  },
  "details": "VendorInfo::as_string(), SoCVendorBrand::as_string(), and ExtendedFunctionInfo::processor_brand_string() construct byte slices using std::slice::from_raw_parts(), with data coming from #[repr(Rust)] structs. This is always undefined behavior.\nThis flaw has been fixed in v9.0.0, by making the relevant structs #[repr(C)].",
  "id": "GHSA-hvqc-pc78-x9wh",
  "modified": "2023-06-13T20:30:27Z",
  "published": "2021-08-25T20:53:10Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-26306"
    },
    {
      "type": "WEB",
      "url": "https://github.com/gz/rust-cpuid/issues/40"
    },
    {
      "type": "WEB",
      "url": "https://github.com/RustSec/advisory-db/pull/614"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/gz/rust-cpuid"
    },
    {
      "type": "WEB",
      "url": "https://rustsec.org/advisories/RUSTSEC-2021-0013.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"
    }
  ],
  "summary": "Soundness issue in raw-cpuid"
}

GHSA-HVW7-225W-4GX2

Vulnerability from github – Published: 2022-05-13 00:00 – Updated: 2022-05-22 00:00
VLAI
Details

Uncontrolled Resource Consumption in GitHub repository causefx/organizr prior to 2.1.2000. This vulnerability can be abused by doing a DDoS attack for which genuine users will not able to access resources/applications.

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2022-1699"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-400"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2022-05-12T16:15:00Z",
    "severity": "HIGH"
  },
  "details": "Uncontrolled Resource Consumption in GitHub repository causefx/organizr prior to 2.1.2000. This vulnerability can be abused by doing a DDoS attack for which genuine users will not able to access resources/applications.",
  "id": "GHSA-hvw7-225w-4gx2",
  "modified": "2022-05-22T00:00:33Z",
  "published": "2022-05-13T00:00:51Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-1699"
    },
    {
      "type": "WEB",
      "url": "https://github.com/causefx/organizr/commit/e4b4cff66c526f7b5bbaef0073c92c315c29bd56"
    },
    {
      "type": "WEB",
      "url": "https://huntr.dev/bounties/3024b2bb-50ca-46a2-85db-1cc916791cda"
    }
  ],
  "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-HW29-37G4-33VR

Vulnerability from github – Published: 2022-05-24 19:10 – Updated: 2022-05-24 19:10
VLAI
Details

Uncontrolled resource consumption in firmware for Intel(R) Ethernet Adapters 800 Series Controllers and associated adapters before version 1.5.3.0 may allow privileged user to potentially enable denial of service via local access.

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2021-0008"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-400"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2021-08-11T13:15:00Z",
    "severity": "MODERATE"
  },
  "details": "Uncontrolled resource consumption in firmware for Intel(R) Ethernet Adapters 800 Series Controllers and associated adapters before version 1.5.3.0 may allow privileged user to potentially enable denial of service via local access.",
  "id": "GHSA-hw29-37g4-33vr",
  "modified": "2022-05-24T19:10:43Z",
  "published": "2022-05-24T19:10:43Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-0008"
    },
    {
      "type": "WEB",
      "url": "https://security.netapp.com/advisory/ntap-20210827-0009"
    },
    {
      "type": "WEB",
      "url": "https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00479.html"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

GHSA-HW5W-QHP3-88F5

Vulnerability from github – Published: 2023-03-01 09:30 – Updated: 2023-03-10 18:30
VLAI
Details

A vulnerability in the DNS functionality of Cisco Nexus Dashboard Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition. This vulnerability is due to the improper processing of DNS requests. An attacker could exploit this vulnerability by sending a continuous stream of DNS requests to an affected device. A successful exploit could allow the attacker to cause the coredns service to stop working or cause the device to reload, resulting in a DoS condition.

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2023-20014"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-400"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2023-03-01T08:15:00Z",
    "severity": "HIGH"
  },
  "details": "A vulnerability in the DNS functionality of Cisco Nexus Dashboard Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition. This vulnerability is due to the improper processing of DNS requests. An attacker could exploit this vulnerability by sending a continuous stream of DNS requests to an affected device. A successful exploit could allow the attacker to cause the coredns service to stop working or cause the device to reload, resulting in a DoS condition.",
  "id": "GHSA-hw5w-qhp3-88f5",
  "modified": "2023-03-10T18:30:23Z",
  "published": "2023-03-01T09:30:29Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-20014"
    },
    {
      "type": "WEB",
      "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ndb-dnsdos-bYscZOsu"
    }
  ],
  "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-HW8J-HW49-752C

Vulnerability from github – Published: 2025-03-20 12:32 – Updated: 2025-03-21 03:36
VLAI
Summary
BentoML Denial of Service (DoS) via Multipart Boundary
Details

BentoML version v1.3.4post1 is vulnerable to a Denial of Service (DoS) attack. The vulnerability can be exploited by appending characters, such as dashes (-), to the end of a multipart boundary in an HTTP request. This causes the server to continuously process each character, leading to excessive resource consumption and rendering the service unavailable. The issue is unauthenticated and does not require any user interaction, impacting all users of the service.

Show details on source website

{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "bentoml"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "1.4.5"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2024-9056"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-400",
      "CWE-770"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2025-03-21T03:36:02Z",
    "nvd_published_at": "2025-03-20T10:15:46Z",
    "severity": "HIGH"
  },
  "details": "BentoML version v1.3.4post1 is vulnerable to a Denial of Service (DoS) attack. The vulnerability can be exploited by appending characters, such as dashes (-), to the end of a multipart boundary in an HTTP request. This causes the server to continuously process each character, leading to excessive resource consumption and rendering the service unavailable. The issue is unauthenticated and does not require any user interaction, impacting all users of the service.",
  "id": "GHSA-hw8j-hw49-752c",
  "modified": "2025-03-21T03:36:02Z",
  "published": "2025-03-20T12:32:50Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-9056"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/bentoml/BentoML"
    },
    {
      "type": "WEB",
      "url": "https://github.com/bentoml/BentoML/blob/a6f5f937be6ec278f3d4f3bbc6f3c8f9564820d7/src/bentoml/_internal/io_descriptors/file.py#L293"
    },
    {
      "type": "WEB",
      "url": "https://github.com/bentoml/BentoML/blob/v1.4.5/src/bentoml/_internal/io_descriptors/file.py#L293C9-L293C66"
    },
    {
      "type": "WEB",
      "url": "https://huntr.com/bounties/a24a13c2-0300-4a95-b26a-ac7fe8f6521b"
    }
  ],
  "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"
    }
  ],
  "summary": "BentoML Denial of Service (DoS) via Multipart Boundary"
}

GHSA-HWFQ-FQ3M-38WW

Vulnerability from github – Published: 2022-05-17 00:21 – Updated: 2022-05-17 00:21
VLAI
Details

An issue was discovered in certain Apple products. macOS before 10.13.1 is affected. The issue involves the "Quick Look" component. It allows remote attackers to execute arbitrary code or cause a denial of service (memory consumption) via a crafted Office document.

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2017-7132"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-400"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2017-11-13T03:29:00Z",
    "severity": "HIGH"
  },
  "details": "An issue was discovered in certain Apple products. macOS before 10.13.1 is affected. The issue involves the \"Quick Look\" component. It allows remote attackers to execute arbitrary code or cause a denial of service (memory consumption) via a crafted Office document.",
  "id": "GHSA-hwfq-fq3m-38ww",
  "modified": "2022-05-17T00:21:14Z",
  "published": "2022-05-17T00:21:14Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2017-7132"
    },
    {
      "type": "WEB",
      "url": "https://support.apple.com/HT208221"
    },
    {
      "type": "WEB",
      "url": "http://www.securitytracker.com/id/1039710"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-HWHF-64MH-R662

Vulnerability from github – Published: 2021-11-01 19:16 – Updated: 2021-11-04 17:05
VLAI
Summary
ReDoS vulnerability in parser_apache2
Details

Impact

parser_apache2 plugin in Fluentd v0.14.14 to v1.14.1 suffers from a regular expression denial of service (ReDoS) vulnerability. A broken apache log with a certain pattern of string can spend too much time in a regular expression, resulting in the potential for a DoS attack.

Patches

v1.14.2

Workarounds

Either of the following:

  • Don't use parser_apache2 for parsing logs which cannot guarantee generated by Apache.
  • Put patched version of parser_apache2.rb into /etc/fluent/plugin directory (or any other directories specified by the environment variable FLUENT_PLUGIN or --plugin option of fluentd).

References

Show details on source website

{
  "affected": [
    {
      "package": {
        "ecosystem": "RubyGems",
        "name": "fluentd"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0.14.14"
            },
            {
              "fixed": "1.14.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2021-41186"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-400"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2021-10-29T13:44:13Z",
    "nvd_published_at": "2021-10-29T14:15:00Z",
    "severity": "MODERATE"
  },
  "details": "### Impact\nparser_apache2 plugin in Fluentd v0.14.14 to v1.14.1 suffers from a regular expression denial of service (ReDoS) vulnerability. A broken apache log with a certain pattern of string can spend too much time in a regular expression, resulting in the potential for a DoS attack.\n\n### Patches\nv1.14.2\n\n### Workarounds\nEither of the following:\n\n* Don\u0027t use parser_apache2 for parsing logs which cannot guarantee generated by Apache.\n* Put patched version of parser_apache2.rb into /etc/fluent/plugin  directory (or any other directories specified by the environment variable `FLUENT_PLUGIN` or `--plugin` option of fluentd).\n\n### References\n* [CVE-2021-41186](http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-41186)\n* [GHSA-hwhf-64mh-r662](https://github.com/fluent/fluentd/security/advisories/GHSA-hwhf-64mh-r662)\n* [GHSL-2021-102](https://securitylab.github.com/advisories/GHSL-2021-102-fluent-fluentd/)\n* https://github.com/fluent/fluentd/blob/master/CHANGELOG.md#v1142\n",
  "id": "GHSA-hwhf-64mh-r662",
  "modified": "2021-11-04T17:05:51Z",
  "published": "2021-11-01T19:16:31Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/fluent/fluentd/security/advisories/GHSA-hwhf-64mh-r662"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-41186"
    },
    {
      "type": "WEB",
      "url": "https://github.com/fluent/fluentd/commit/5482a3d049dab351de0be68f4b4bc562319d8511"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/fluent/fluentd"
    },
    {
      "type": "WEB",
      "url": "https://github.com/fluent/fluentd/blob/master/CHANGELOG.md#v1142"
    },
    {
      "type": "WEB",
      "url": "https://github.com/github/securitylab-vulnerabilities/blob/52dc4a2a828c6dc24231967c2937ad92038184a9/vendor_reports/GHSL-2021-102-fluent-fluentd.md"
    },
    {
      "type": "WEB",
      "url": "https://github.com/rubysec/ruby-advisory-db/blob/master/gems/fluentd/CVE-2021-41186.yml"
    }
  ],
  "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": "ReDoS vulnerability in parser_apache2"
}

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.