CWE-400
DiscouragedUncontrolled 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-2RMJ-MQ67-H97G
Vulnerability from github – Published: 2024-09-24 18:34 – Updated: 2025-02-21 15:15Description
Applications that parse ETags from If-Match or If-None-Match request headers are vulnerable to DoS attack.
Affected Spring Products and Versions
org.springframework:spring-web in versions
6.1.0 through 6.1.11 6.0.0 through 6.0.22 5.3.0 through 5.3.37
Older, unsupported versions are also affected
Mitigation
Users of affected versions should upgrade to the corresponding fixed version. 6.1.x -> 6.1.12 6.0.x -> 6.0.23 5.3.x -> 5.3.38 No other mitigation steps are necessary.
Users of older, unsupported versions could enforce a size limit on If-Match and If-None-Match headers, e.g. through a Filter.
{
"affected": [
{
"package": {
"ecosystem": "Maven",
"name": "org.springframework:spring-web"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "5.3.38"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "Maven",
"name": "org.springframework:spring-web"
},
"ranges": [
{
"events": [
{
"introduced": "6.0.0"
},
{
"fixed": "6.0.23"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "Maven",
"name": "org.springframework:spring-web"
},
"ranges": [
{
"events": [
{
"introduced": "6.1.0"
},
{
"fixed": "6.1.12"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2024-38809"
],
"database_specific": {
"cwe_ids": [
"CWE-1333",
"CWE-400"
],
"github_reviewed": true,
"github_reviewed_at": "2024-09-24T18:34:43Z",
"nvd_published_at": "2024-09-27T17:15:12Z",
"severity": "MODERATE"
},
"details": "### Description\nApplications that parse ETags from `If-Match` or `If-None-Match` request headers are vulnerable to DoS attack.\n\n### Affected Spring Products and Versions\norg.springframework:spring-web in versions \n\n6.1.0 through 6.1.11\n6.0.0 through 6.0.22\n5.3.0 through 5.3.37\n\nOlder, unsupported versions are also affected\n\n### Mitigation\nUsers of affected versions should upgrade to the corresponding fixed version.\n6.1.x -\u003e 6.1.12\n6.0.x -\u003e 6.0.23\n5.3.x -\u003e 5.3.38\nNo other mitigation steps are necessary.\n\nUsers of older, unsupported versions could enforce a size limit on `If-Match` and `If-None-Match` headers, e.g. through a Filter.",
"id": "GHSA-2rmj-mq67-h97g",
"modified": "2025-02-21T15:15:57Z",
"published": "2024-09-24T18:34:43Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-38809"
},
{
"type": "WEB",
"url": "https://github.com/spring-projects/spring-framework/issues/33372"
},
{
"type": "WEB",
"url": "https://github.com/spring-projects/spring-framework/commit/582bfccbb72e5c8959a0b472d1dc7d03a20520f3"
},
{
"type": "WEB",
"url": "https://github.com/spring-projects/spring-framework/commit/8d16a50907c11f7e6b407d878a26e84eba08a533"
},
{
"type": "WEB",
"url": "https://github.com/spring-projects/spring-framework/commit/bb17ad8314b81850a939fd265fb53b3361705e85"
},
{
"type": "PACKAGE",
"url": "https://github.com/spring-projects/spring-framework"
},
{
"type": "WEB",
"url": "https://spring.io/security/cve-2024-38809"
}
],
"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:L",
"type": "CVSS_V3"
}
],
"summary": "Spring Framework DoS via conditional HTTP request"
}
GHSA-2RR7-XRRM-67CF
Vulnerability from github – Published: 2025-03-20 12:32 – Updated: 2025-03-20 12:32A vulnerability in imartinez/privategpt version 0.5.0 allows for a Denial of Service (DOS) attack. When uploading a file, if an attacker appends a large number of characters to the end of a multipart boundary, the system will continuously process these characters, rendering privateGPT inaccessible. This uncontrolled resource consumption can lead to prolonged unavailability of the service, disrupting operations and causing potential data inaccessibility and loss of productivity.
{
"affected": [],
"aliases": [
"CVE-2024-8018"
],
"database_specific": {
"cwe_ids": [
"CWE-400",
"CWE-770"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-03-20T10:15:38Z",
"severity": "HIGH"
},
"details": "A vulnerability in imartinez/privategpt version 0.5.0 allows for a Denial of Service (DOS) attack. When uploading a file, if an attacker appends a large number of characters to the end of a multipart boundary, the system will continuously process these characters, rendering privateGPT inaccessible. This uncontrolled resource consumption can lead to prolonged unavailability of the service, disrupting operations and causing potential data inaccessibility and loss of productivity.",
"id": "GHSA-2rr7-xrrm-67cf",
"modified": "2025-03-20T12:32:47Z",
"published": "2025-03-20T12:32:47Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-8018"
},
{
"type": "WEB",
"url": "https://huntr.com/bounties/0661fa3b-bea4-4156-abed-a65d51958505"
}
],
"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-2V2X-9XMF-M2F7
Vulnerability from github – Published: 2022-05-01 01:51 – Updated: 2022-05-01 01:51Stack consumption vulnerability in Microsoft Exchange Server 2003 SP1 allows users to cause a denial of service (hang) by deleting or moving a folder with deeply nested subfolders, which causes Microsoft Exchange Information Store service (Store.exe) to hang as a result of a large number of recursive calls.
{
"affected": [],
"aliases": [
"CVE-2005-0738"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2005-05-02T04:00:00Z",
"severity": "MODERATE"
},
"details": "Stack consumption vulnerability in Microsoft Exchange Server 2003 SP1 allows users to cause a denial of service (hang) by deleting or moving a folder with deeply nested subfolders, which causes Microsoft Exchange Information Store service (Store.exe) to hang as a result of a large number of recursive calls.",
"id": "GHSA-2v2x-9xmf-m2f7",
"modified": "2022-05-01T01:51:46Z",
"published": "2022-05-01T01:51:46Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2005-0738"
},
{
"type": "WEB",
"url": "http://secunia.com/advisories/14543"
},
{
"type": "WEB",
"url": "http://support.microsoft.com/?kbid=891504"
}
],
"schema_version": "1.4.0",
"severity": []
}
GHSA-2V44-87C2-PXR3
Vulnerability from github – Published: 2026-07-21 18:31 – Updated: 2026-07-21 18:31This High severity DoS (Denial of Service) vulnerability was introduced in versions 9.0.1, 9.1.0, 9.2.0, 9.3.1, 9.4.0, 9.5.1, 10.0.2, 10.1.0 and 10.2.0 of Confluence Data Center.
This DoS (Denial of Service) vulnerability, with a CVSS Score of 7.1, allows an authenticated attacker to cause a resource to be unavailable for its intended users by temporarily or indefinitely disrupting services of a host connected to a network.
Atlassian recommends that Confluence Data Center customers upgrade to latest version, if you are unable to do so, upgrade your instance to one of the specified supported fixed versions: Confluence Data Center 9.2: Upgrade to a release greater than or equal to 9.2.17
Confluence Data Center 10.2: Upgrade to a release greater than or equal to 10.2.7
See the release notes ([https://confluence.atlassian.com/doc/confluence-release-notes-327.html]). You can download the latest version of Confluence Data Center from the download center ([https://www.atlassian.com/software/confluence/download-archives]).
This vulnerability was reported via our Penetration Testing program.
{
"affected": [],
"aliases": [
"CVE-2026-21577"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-07-21T18:16:57Z",
"severity": "HIGH"
},
"details": "This High severity DoS (Denial of Service) vulnerability was introduced in versions 9.0.1, 9.1.0, 9.2.0, 9.3.1, 9.4.0, 9.5.1, 10.0.2, 10.1.0 and 10.2.0 of Confluence Data Center.\n\nThis DoS (Denial of Service) vulnerability, with a CVSS Score of 7.1, allows an authenticated attacker to cause a resource to be unavailable for its intended users by temporarily or indefinitely disrupting services of a host connected to a network.\n\nAtlassian recommends that Confluence Data Center customers upgrade to latest version, if you are unable to do so, upgrade your instance to one of the specified supported fixed versions:\n Confluence Data Center 9.2: Upgrade to a release greater than or equal to 9.2.17\n\n Confluence Data Center 10.2: Upgrade to a release greater than or equal to 10.2.7\n\nSee the release notes ([https://confluence.atlassian.com/doc/confluence-release-notes-327.html]). You can download the latest version of Confluence Data Center from the download center ([https://www.atlassian.com/software/confluence/download-archives]).\n\nThis vulnerability was reported via our Penetration Testing program.",
"id": "GHSA-2v44-87c2-pxr3",
"modified": "2026-07-21T18:31:03Z",
"published": "2026-07-21T18:31:03Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-21577"
},
{
"type": "WEB",
"url": "https://confluence.atlassian.com/pages/viewpage.action?pageId=1821999345"
},
{
"type": "WEB",
"url": "https://jira.atlassian.com/browse/CONFSERVER-104334"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/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-2V8G-W9JX-FC2W
Vulnerability from github – Published: 2023-01-26 21:30 – Updated: 2023-02-01 21:30In setMimeGroup of PackageManagerService.java, there is a possible crash loop due to resource exhaustion. This could lead to local denial of service with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android-11 Android-12 Android-12L Android-13Android ID: A-237291548
{
"affected": [],
"aliases": [
"CVE-2023-20922"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2023-01-26T21:18:00Z",
"severity": "MODERATE"
},
"details": "In setMimeGroup of PackageManagerService.java, there is a possible crash loop due to resource exhaustion. This could lead to local denial of service with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android-11 Android-12 Android-12L Android-13Android ID: A-237291548",
"id": "GHSA-2v8g-w9jx-fc2w",
"modified": "2023-02-01T21:30:24Z",
"published": "2023-01-26T21:30:20Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-20922"
},
{
"type": "WEB",
"url": "https://source.android.com/security/bulletin/2023-01-01"
}
],
"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-2VGR-C24V-3XF3
Vulnerability from github – Published: 2022-01-31 00:00 – Updated: 2022-03-17 00:06save_window_function_values in MariaDB before 10.6.3 allows an application crash because of incorrect handling of with_window_func=true for a subquery.
{
"affected": [],
"aliases": [
"CVE-2021-46658"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2022-01-29T23:15:00Z",
"severity": "MODERATE"
},
"details": "save_window_function_values in MariaDB before 10.6.3 allows an application crash because of incorrect handling of with_window_func=true for a subquery.",
"id": "GHSA-2vgr-c24v-3xf3",
"modified": "2022-03-17T00:06:06Z",
"published": "2022-01-31T00:00:23Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2021-46658"
},
{
"type": "WEB",
"url": "https://jira.mariadb.org/browse/MDEV-25630"
},
{
"type": "WEB",
"url": "https://mariadb.com/kb/en/security"
},
{
"type": "WEB",
"url": "https://security.netapp.com/advisory/ntap-20220221-0002"
}
],
"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-2VHP-VV3F-JJ79
Vulnerability from github – Published: 2022-05-24 17:11 – Updated: 2022-05-24 17:11NVIDIA vGPU graphics driver for guest OS contains a vulnerability in which an incorrect resource clean up on a failure path can impact the guest VM, leading to denial of service.
{
"affected": [],
"aliases": [
"CVE-2020-5961"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2020-03-12T20:15:00Z",
"severity": "LOW"
},
"details": "NVIDIA vGPU graphics driver for guest OS contains a vulnerability in which an incorrect resource clean up on a failure path can impact the guest VM, leading to denial of service.",
"id": "GHSA-2vhp-vv3f-jj79",
"modified": "2022-05-24T17:11:20Z",
"published": "2022-05-24T17:11:20Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2020-5961"
},
{
"type": "WEB",
"url": "https://nvidia.custhelp.com/app/answers/detail/a_id/4996"
}
],
"schema_version": "1.4.0",
"severity": []
}
GHSA-2VW3-R555-JWCC
Vulnerability from github – Published: 2023-01-26 21:30 – Updated: 2023-02-01 21:30{
"affected": [],
"aliases": [
"CVE-2022-27508"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2023-01-26T21:15:00Z",
"severity": "HIGH"
},
"details": "Unauthenticated denial of service",
"id": "GHSA-2vw3-r555-jwcc",
"modified": "2023-02-01T21:30:22Z",
"published": "2023-01-26T21:30:25Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2022-27508"
},
{
"type": "WEB",
"url": "https://support.citrix.com/article/CTX457048/citrix-adc-and-citrix-gateway-security-bulletin-for-cve202227507-and-cve202227508"
}
],
"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-2W4M-XHC4-2CXX
Vulnerability from github – Published: 2022-05-24 22:28 – Updated: 2023-01-10 12:30A vulnerability has been identified in SIMATIC S7-1200 CPU family (incl. SIPLUS variants) (All versions < V4.1), SIMATIC S7-300 PN/DP CPU family (incl. related ET200 CPUs and SIPLUS variants) (All versions), SIMATIC S7-400 PN/DP V6 and below CPU family (incl. SIPLUS variants) (All versions), SIMATIC S7-400 PN/DP V7 CPU family (incl. SIPLUS variants) (All versions). Affected devices contain a vulnerability that could cause a Denial-of-Service condition of the web server by sending specially crafted HTTP requests to ports 80/tcp and 443/tcp. The security vulnerability could be exploited by an attacker with network access to an affected device. Successful exploitation requires no system privileges and no user interaction. An attacker could use the vulnerability to compromise the availability of the device’s web server. Beyond the web service, no other functions or interfaces are affected by the Denial-of-Service condition.
{
"affected": [],
"aliases": [
"CVE-2019-13940"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2020-02-11T16:15:00Z",
"severity": "MODERATE"
},
"details": "A vulnerability has been identified in SIMATIC S7-1200 CPU family (incl. SIPLUS variants) (All versions \u003c V4.1), SIMATIC S7-300 PN/DP CPU family (incl. related ET200 CPUs and SIPLUS variants) (All versions), SIMATIC S7-400 PN/DP V6 and below CPU family (incl. SIPLUS variants) (All versions), SIMATIC S7-400 PN/DP V7 CPU family (incl. SIPLUS variants) (All versions). Affected devices contain a vulnerability that could cause a Denial-of-Service condition of the web server by sending specially crafted HTTP requests to ports 80/tcp and 443/tcp. The security vulnerability could be exploited by an attacker with network access to an affected device. Successful exploitation requires no system privileges and no user interaction. An attacker could use the vulnerability to compromise the availability of the device\u2019s web server. Beyond the web service, no other functions or interfaces are affected by the Denial-of-Service condition.",
"id": "GHSA-2w4m-xhc4-2cxx",
"modified": "2023-01-10T12:30:26Z",
"published": "2022-05-24T22:28:05Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2019-13940"
},
{
"type": "WEB",
"url": "https://cert-portal.siemens.com/productcert/pdf/ssa-431678.pdf"
},
{
"type": "WEB",
"url": "https://www.us-cert.gov/ics/advisories/icsa-20-042-05"
}
],
"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-2W79-R9G8-WMCR
Vulnerability from github – Published: 2026-04-03 03:13 – Updated: 2026-05-06 02:40Summary
Incomplete fix for CVE-2026-32062: voice-call still parses large WebSocket frames before start validation
Current Maintainer Triage
- Normalized severity: medium
- Assessment: v2026.3.28 still parses oversized pre-start voice-call WebSocket frames before start validation, and the unreleased maxPayload fix confirms the shipped resource-consumption bug remains open.
Affected Packages / Versions
- Package:
openclaw(npm) - Latest published npm version:
2026.3.31 - Vulnerable version range:
<=2026.3.28 - Patched versions:
>= 2026.3.31 - First stable tag containing the fix:
v2026.3.31
Fix Commit(s)
9abcfdadf591bf266d85fbdfe14ae833e557a110— 2026-03-31T19:47:10+09:00
OpenClaw thanks @Kazamayc for reporting.
{
"affected": [
{
"database_specific": {
"last_known_affected_version_range": "\u003c= 2026.3.28"
},
"package": {
"ecosystem": "npm",
"name": "openclaw"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2026.3.31"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2026-41400"
],
"database_specific": {
"cwe_ids": [
"CWE-400",
"CWE-770"
],
"github_reviewed": true,
"github_reviewed_at": "2026-04-03T03:13:35Z",
"nvd_published_at": "2026-04-28T19:37:43Z",
"severity": "MODERATE"
},
"details": "## Summary\nIncomplete fix for CVE-2026-32062: voice-call still parses large WebSocket frames before start validation\n\n## Current Maintainer Triage\n- Normalized severity: medium\n- Assessment: v2026.3.28 still parses oversized pre-start voice-call WebSocket frames before start validation, and the unreleased maxPayload fix confirms the shipped resource-consumption bug remains open.\n\n## Affected Packages / Versions\n- Package: `openclaw` (npm)\n- Latest published npm version: `2026.3.31`\n- Vulnerable version range: `\u003c=2026.3.28`\n- Patched versions: `\u003e= 2026.3.31`\n- First stable tag containing the fix: `v2026.3.31`\n\n## Fix Commit(s)\n- `9abcfdadf591bf266d85fbdfe14ae833e557a110` \u2014 2026-03-31T19:47:10+09:00\n\nOpenClaw thanks @Kazamayc for reporting.",
"id": "GHSA-2w79-r9g8-wmcr",
"modified": "2026-05-06T02:40:46Z",
"published": "2026-04-03T03:13:35Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/openclaw/openclaw/security/advisories/GHSA-2w79-r9g8-wmcr"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-41400"
},
{
"type": "WEB",
"url": "https://github.com/openclaw/openclaw/commit/9abcfdadf591bf266d85fbdfe14ae833e557a110"
},
{
"type": "PACKAGE",
"url": "https://github.com/openclaw/openclaw"
},
{
"type": "WEB",
"url": "https://github.com/openclaw/openclaw/releases/tag/v2026.3.31"
},
{
"type": "WEB",
"url": "https://www.vulncheck.com/advisories/openclaw-resource-consumption-via-oversized-websocket-frames-in-voice-call"
}
],
"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:L",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N",
"type": "CVSS_V4"
}
],
"summary": "OpenClaw: Voice-call still parses large WebSocket frames before start validation (Incomplete fix for CVE-2026-32062)"
}
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.