CWE-400
DiscouragedUncontrolled Resource Consumption
Abstraction: Class · Status: Draft
The product does not properly control the allocation and maintenance of a limited resource.
5412 vulnerabilities reference this CWE, most recent first.
GHSA-X5HX-JQ5Q-RRGR
Vulnerability from github – Published: 2022-05-24 22:33 – Updated: 2022-05-24 22:33Uncontrolled resource consumption in the Intel(R) Distribution of OpenVINOâ„¢ Toolkit before version 2021.4 may allow an unauthenticated user to potentially enable denial of service via local access.
{
"affected": [],
"aliases": [
"CVE-2021-33073"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2021-11-17T20:15:00Z",
"severity": "MODERATE"
},
"details": "Uncontrolled resource consumption in the Intel(R) Distribution of OpenVINO\u00e2\u201e\u00a2 Toolkit before version 2021.4 may allow an unauthenticated user to potentially enable denial of service via local access.",
"id": "GHSA-x5hx-jq5q-rrgr",
"modified": "2022-05-24T22:33:53Z",
"published": "2022-05-24T22:33:53Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2021-33073"
},
{
"type": "WEB",
"url": "https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00538.html"
}
],
"schema_version": "1.4.0",
"severity": []
}
GHSA-X5M8-7FVV-VCVJ
Vulnerability from github – Published: 2025-08-29 18:30 – Updated: 2025-09-19 18:31An uncontrolled resource consumption vulnerability has been reported to affect Qsync Central. If a remote attacker gains a user account, they can then exploit the vulnerability to launch a denial-of-service (DoS) attack.
We have already fixed the vulnerability in the following version: Qsync Central 4.5.0.7 ( 2025/04/23 ) and later
{
"affected": [],
"aliases": [
"CVE-2025-29898"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-08-29T18:15:36Z",
"severity": "MODERATE"
},
"details": "An uncontrolled resource consumption vulnerability has been reported to affect Qsync Central. If a remote attacker gains a user account, they can then exploit the vulnerability to launch a denial-of-service (DoS) attack.\n\nWe have already fixed the vulnerability in the following version:\nQsync Central 4.5.0.7 ( 2025/04/23 ) and later",
"id": "GHSA-x5m8-7fvv-vcvj",
"modified": "2025-09-19T18:31:20Z",
"published": "2025-08-29T18:30:52Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-29898"
},
{
"type": "WEB",
"url": "https://www.qnap.com/en/security-advisory/qsa-25-22"
}
],
"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"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
"type": "CVSS_V4"
}
]
}
GHSA-X5MC-4P5H-GRH2
Vulnerability from github – Published: 2022-05-13 01:14 – Updated: 2025-04-20 03:46Apache Subversion's mod_dontdothat module and HTTP clients 1.4.0 through 1.8.16, and 1.9.0 through 1.9.4 are vulnerable to a denial-of-service attack caused by exponential XML entity expansion. The attack can cause the targeted process to consume an excessive amount of CPU resources or memory.
{
"affected": [],
"aliases": [
"CVE-2016-8734"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2017-10-16T13:29:00Z",
"severity": "MODERATE"
},
"details": "Apache Subversion\u0027s mod_dontdothat module and HTTP clients 1.4.0 through 1.8.16, and 1.9.0 through 1.9.4 are vulnerable to a denial-of-service attack caused by exponential XML entity expansion. The attack can cause the targeted process to consume an excessive amount of CPU resources or memory.",
"id": "GHSA-x5mc-4p5h-grh2",
"modified": "2025-04-20T03:46:51Z",
"published": "2022-05-13T01:14:24Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2016-8734"
},
{
"type": "WEB",
"url": "https://lists.apache.org/thread.html/7798f5cda1b2a3c70db4be77694b12dec8fcc1a441b00009d44f0e09%40%3Cannounce.apache.org%3E"
},
{
"type": "WEB",
"url": "https://lists.apache.org/thread.html/7798f5cda1b2a3c70db4be77694b12dec8fcc1a441b00009d44f0e09@%3Cannounce.apache.org%3E"
},
{
"type": "WEB",
"url": "https://subversion.apache.org/security/CVE-2016-8734-advisory.txt"
},
{
"type": "WEB",
"url": "https://www.oracle.com/security-alerts/cpuoct2020.html"
},
{
"type": "WEB",
"url": "http://www.debian.org/security/2017/dsa-3932"
},
{
"type": "WEB",
"url": "http://www.securityfocus.com/bid/94588"
},
{
"type": "WEB",
"url": "http://www.securitytracker.com/id/1037361"
}
],
"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-X5MH-XCWG-V34G
Vulnerability from github – Published: 2024-07-24 09:30 – Updated: 2024-07-24 09:30An issue in the Certificate Authenticated Session Establishment (CASE) protocol for establishing secure sessions between two devices, as implemented in the Matter protocol versions before Matter 1.1 allows an attacker to replay manipulated CASE Sigma1 messages to make the device unresponsive until the device is power-cycled.
{
"affected": [],
"aliases": [
"CVE-2024-3297"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-07-24T08:15:02Z",
"severity": "MODERATE"
},
"details": "An issue in the Certificate Authenticated Session Establishment (CASE) protocol for establishing secure sessions between two devices, as implemented in the Matter protocol versions before Matter 1.1 allows an attacker to replay manipulated CASE Sigma1 messages to make the device unresponsive until\u00a0the device is power-cycled.",
"id": "GHSA-x5mh-xcwg-v34g",
"modified": "2024-07-24T09:30:40Z",
"published": "2024-07-24T09:30:40Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-3297"
},
{
"type": "WEB",
"url": "https://www.bitdefender.com/support/security-advisories/session-establishment-lock-up-during-replay-of-case-sigma1-messages"
}
],
"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-X5PG-88WF-QQ4P
Vulnerability from github – Published: 2018-07-24 20:10 – Updated: 2023-09-07 22:11Affected versions of marked are vulnerable to a regular expression denial of service.
The amplification in this vulnerability is significant, with 1,000 characters resulting in the event loop being blocked for around 6 seconds.
Recommendation
Update to version 0.3.9 or later.
{
"affected": [
{
"package": {
"ecosystem": "npm",
"name": "marked"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "0.3.9"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2017-16114"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": true,
"github_reviewed_at": "2020-06-16T22:02:12Z",
"nvd_published_at": null,
"severity": "HIGH"
},
"details": "Affected versions of `marked` are vulnerable to a regular expression denial of service. \n\nThe amplification in this vulnerability is significant, with 1,000 characters resulting in the event loop being blocked for around 6 seconds.\n\n\n## Recommendation\n\nUpdate to version 0.3.9 or later.",
"id": "GHSA-x5pg-88wf-qq4p",
"modified": "2023-09-07T22:11:27Z",
"published": "2018-07-24T20:10:52Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2017-16114"
},
{
"type": "WEB",
"url": "https://github.com/chjj/marked/issues/937"
},
{
"type": "ADVISORY",
"url": "https://github.com/advisories/GHSA-x5pg-88wf-qq4p"
},
{
"type": "WEB",
"url": "https://www.npmjs.com/advisories/531"
}
],
"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": "Regular Expression Denial of Service in marked"
}
GHSA-X5Q3-6R8G-HM2V
Vulnerability from github – Published: 2026-01-14 18:31 – Updated: 2026-01-14 21:34Paessler PRTG Network Monitor before 25.4.114 allows Denial-of-Service (DoS) by an authenticated attacker via the Notification Contacts functionality.
{
"affected": [],
"aliases": [
"CVE-2025-67835"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-01-14T17:16:07Z",
"severity": "MODERATE"
},
"details": "Paessler PRTG Network Monitor before 25.4.114 allows Denial-of-Service (DoS) by an authenticated attacker via the Notification Contacts functionality.",
"id": "GHSA-x5q3-6r8g-hm2v",
"modified": "2026-01-14T21:34:10Z",
"published": "2026-01-14T18:31:37Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-67835"
},
{
"type": "WEB",
"url": "https://helpdesk.paessler.com/en/support/solutions/articles/76000087289-vulnerabilities-in-prtg-prior-v25-4-114-1032"
},
{
"type": "WEB",
"url": "https://paessler.com"
}
],
"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-X5R4-FJPR-VR8V
Vulnerability from github – Published: 2021-12-02 00:00 – Updated: 2022-04-27 00:00Uncontrolled Resource Consumption vulnerability in MELSEC iQ-R Series R00/01/02CPU Firmware versions "24" and prior, MELSEC iQ-R Series R04/08/16/32/120(EN)CPU Firmware versions "57" and prior, MELSEC iQ-R Series R08/16/32/120SFCPU All versions, MELSEC iQ-R Series R08/16/32/120PCPU Firmware versions "29" and prior, MELSEC iQ-R Series R08/16/32/120PSFCPU All versions, MELSEC iQ-R Series R16/32/64MTCPU All versions, MELSEC iQ-R Series R12CCPU-V All versions, MELSEC Q Series Q03UDECPU All versions, MELSEC Q Series Q04/06/10/13/20/26/50/100UDEHCPU All versions, MELSEC Q Series Q03/04/06/13/26UDVCPU The first 5 digits of serial No. "23071" and prior, MELSEC Q Series Q04/06/13/26UDPVCPU The first 5 digits of serial No. "23071" and prior, MELSEC Q Series Q12DCCPU-V All versions, MELSEC Q Series Q24DHCCPU-V(G) All versions, MELSEC Q Series Q24/26DHCCPU-LS All versions, MELSEC Q Series MR-MQ100 All versions, MELSEC Q Series Q172/173DCPU-S1 All versions, MELSEC Q Series Q172/172DSCPU All versions, MELSEC Q Series Q170MCPU All versions, MELSEC Q Series Q170MSCPU(-S1) All versions, MELSEC L Series L02/06/26CPU(-P) All versions, MELSEC L Series L26CPU-(P)BT All versions and MELIPC Series MI5122-VW All versions allows a remote unauthenticated attacker to cause a denial-of-service (DoS) condition by sending specially crafted packets. System reset is required for recovery.
{
"affected": [],
"aliases": [
"CVE-2021-20609"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2021-12-01T16:15:00Z",
"severity": "HIGH"
},
"details": "Uncontrolled Resource Consumption vulnerability in MELSEC iQ-R Series R00/01/02CPU Firmware versions \"24\" and prior, MELSEC iQ-R Series R04/08/16/32/120(EN)CPU Firmware versions \"57\" and prior, MELSEC iQ-R Series R08/16/32/120SFCPU All versions, MELSEC iQ-R Series R08/16/32/120PCPU Firmware versions \"29\" and prior, MELSEC iQ-R Series R08/16/32/120PSFCPU All versions, MELSEC iQ-R Series R16/32/64MTCPU All versions, MELSEC iQ-R Series R12CCPU-V All versions, MELSEC Q Series Q03UDECPU All versions, MELSEC Q Series Q04/06/10/13/20/26/50/100UDEHCPU All versions, MELSEC Q Series Q03/04/06/13/26UDVCPU The first 5 digits of serial No. \"23071\" and prior, MELSEC Q Series Q04/06/13/26UDPVCPU The first 5 digits of serial No. \"23071\" and prior, MELSEC Q Series Q12DCCPU-V All versions, MELSEC Q Series Q24DHCCPU-V(G) All versions, MELSEC Q Series Q24/26DHCCPU-LS All versions, MELSEC Q Series MR-MQ100 All versions, MELSEC Q Series Q172/173DCPU-S1 All versions, MELSEC Q Series Q172/172DSCPU All versions, MELSEC Q Series Q170MCPU All versions, MELSEC Q Series Q170MSCPU(-S1) All versions, MELSEC L Series L02/06/26CPU(-P) All versions, MELSEC L Series L26CPU-(P)BT All versions and MELIPC Series MI5122-VW All versions allows a remote unauthenticated attacker to cause a denial-of-service (DoS) condition by sending specially crafted packets. System reset is required for recovery.",
"id": "GHSA-x5r4-fjpr-vr8v",
"modified": "2022-04-27T00:00:52Z",
"published": "2021-12-02T00:00:37Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2021-20609"
},
{
"type": "WEB",
"url": "https://jvn.jp/vu/JVNVU94434051/index.html"
},
{
"type": "WEB",
"url": "https://us-cert.cisa.gov/ics/advisories/icsa-21-334-02"
},
{
"type": "WEB",
"url": "https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2021-019_en.pdf"
}
],
"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-X5R6-X823-9848
Vulnerability from github – Published: 2021-05-10 19:15 – Updated: 2023-09-05 22:44npm json-ptr before 2.1.0 has an arbitrary code execution vulnerability. The issue occurs in the set operation when the force flag is set to true. The function recursively set the property in the target object, however it does not properly check the key being set, leading to a prototype pollution.
{
"affected": [
{
"package": {
"ecosystem": "npm",
"name": "json-ptr"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2.1.0"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2020-7766"
],
"database_specific": {
"cwe_ids": [
"CWE-1321",
"CWE-400",
"CWE-74"
],
"github_reviewed": true,
"github_reviewed_at": "2021-04-19T23:01:34Z",
"nvd_published_at": "2020-11-10T16:15:00Z",
"severity": "HIGH"
},
"details": "npm `json-ptr` before 2.1.0 has an arbitrary code execution vulnerability. The issue occurs in the [set operation](https://flitbit.github.io/json-ptr/classes/_src_pointer_.jsonpointer.htmlset) when the force flag is set to true. The function recursively set the property in the target object, however it does not properly check the key being set, leading to a prototype pollution.",
"id": "GHSA-x5r6-x823-9848",
"modified": "2023-09-05T22:44:45Z",
"published": "2021-05-10T19:15:43Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2020-7766"
},
{
"type": "WEB",
"url": "https://github.com/418sec/json-ptr/pull/3"
},
{
"type": "WEB",
"url": "https://github.com/flitbit/json-ptr/commit/2539e3494c80af1eef24f0f433654a61f255f011"
},
{
"type": "WEB",
"url": "https://github.com/flitbit/json-ptr/blob/master/src/util.ts%23L174"
},
{
"type": "WEB",
"url": "https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1038396"
},
{
"type": "WEB",
"url": "https://snyk.io/vuln/SNYK-JS-JSONPTR-1016939"
},
{
"type": "WEB",
"url": "https://www.huntr.dev/bounties/2-npm-json-ptr"
},
{
"type": "WEB",
"url": "https://www.npmjs.com/package/json-ptr"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L",
"type": "CVSS_V3"
}
],
"summary": "Arbitrary Code Execution in json-ptr"
}
GHSA-X5RQ-J2XG-H7QM
Vulnerability from github – Published: 2019-07-19 16:13 – Updated: 2025-09-29 20:19lodash prior to 4.7.11 is affected by: CWE-400: Uncontrolled Resource Consumption. The impact is: Denial of service. The component is: Date handler. The attack vector is: Attacker provides very long strings, which the library attempts to match using a regular expression. The fixed version is: 4.7.11.
{
"affected": [
{
"package": {
"ecosystem": "npm",
"name": "lodash"
},
"ranges": [
{
"events": [
{
"introduced": "4.7.0"
},
{
"fixed": "4.17.11"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "npm",
"name": "lodash-es"
},
"ranges": [
{
"events": [
{
"introduced": "4.7.0"
},
{
"fixed": "4.17.11"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "npm",
"name": "lodash-amd"
},
"ranges": [
{
"events": [
{
"introduced": "4.7.0"
},
{
"fixed": "4.17.11"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "RubyGems",
"name": "lodash-rails"
},
"ranges": [
{
"events": [
{
"introduced": "4.7.0"
},
{
"fixed": "4.17.11"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2019-1010266"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": true,
"github_reviewed_at": "2019-07-19T16:11:26Z",
"nvd_published_at": null,
"severity": "MODERATE"
},
"details": "lodash prior to 4.7.11 is affected by: CWE-400: Uncontrolled Resource Consumption. The impact is: Denial of service. The component is: Date handler. The attack vector is: Attacker provides very long strings, which the library attempts to match using a regular expression. The fixed version is: 4.7.11.",
"id": "GHSA-x5rq-j2xg-h7qm",
"modified": "2025-09-29T20:19:28Z",
"published": "2019-07-19T16:13:07Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2019-1010266"
},
{
"type": "WEB",
"url": "https://github.com/lodash/lodash/issues/3359"
},
{
"type": "WEB",
"url": "https://github.com/github/advisory-database/pull/6138"
},
{
"type": "WEB",
"url": "https://github.com/lodash/lodash/commit/5c08f18d365b64063bfbfa686cbb97cdd6267347"
},
{
"type": "PACKAGE",
"url": "https://github.com/lodash/lodash"
},
{
"type": "WEB",
"url": "https://github.com/lodash/lodash/wiki/Changelog"
},
{
"type": "WEB",
"url": "https://github.com/rubysec/ruby-advisory-db/blob/master/gems/lodash-rails/CVE-2019-1010266.yml"
},
{
"type": "WEB",
"url": "https://security.netapp.com/advisory/ntap-20190919-0004"
},
{
"type": "WEB",
"url": "https://snyk.io/vuln/SNYK-JS-LODASH-73639"
}
],
"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"
}
],
"summary": "Regular Expression Denial of Service (ReDoS) in lodash"
}
GHSA-X5XW-28W4-53J5
Vulnerability from github – Published: 2025-03-20 12:32 – Updated: 2025-03-21 17:54A Denial of Service (DoS) vulnerability exists in the brycedrennan/imaginairy repository, version 15.0.0. The vulnerability is present in the /api/stablestudio/generate endpoint, which can be exploited by sending an invalid request. This causes the server process to terminate abruptly, outputting KILLED in the terminal, and results in the unavailability of the server. This issue disrupts the server's functionality, affecting all users.
{
"affected": [
{
"package": {
"ecosystem": "PyPI",
"name": "imaginAIry"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "15.0.0"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2024-12761"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": true,
"github_reviewed_at": "2025-03-21T17:54:02Z",
"nvd_published_at": "2025-03-20T10:15:29Z",
"severity": "HIGH"
},
"details": "A Denial of Service (DoS) vulnerability exists in the brycedrennan/imaginairy repository, version 15.0.0. The vulnerability is present in the `/api/stablestudio/generate` endpoint, which can be exploited by sending an invalid request. This causes the server process to terminate abruptly, outputting `KILLED` in the terminal, and results in the unavailability of the server. This issue disrupts the server\u0027s functionality, affecting all users.",
"id": "GHSA-x5xw-28w4-53j5",
"modified": "2025-03-21T17:54:02Z",
"published": "2025-03-20T12:32:43Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-12761"
},
{
"type": "PACKAGE",
"url": "https://github.com/brycedrennan/imaginAIry"
},
{
"type": "WEB",
"url": "https://huntr.com/bounties/282900f4-2498-42c4-8ce7-ba5368aaf035"
}
],
"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": "imaginAIry Denial of Service (DoS) vulnerability"
}
Mitigation
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
- 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
Ensure that protocols have specific limits of scale placed on them.
Mitigation
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.