CWE-400
DiscouragedUncontrolled Resource Consumption
Abstraction: Class · Status: Draft
The product does not properly control the allocation and maintenance of a limited resource.
5631 vulnerabilities reference this CWE, most recent first.
GHSA-8RH3-RVV2-3MR4
Vulnerability from github – Published: 2026-02-17 21:31 – Updated: 2026-02-17 21:31A vulnerability in the management API of the affected product could allow an unauthenticated remote attacker to trigger service restarts. Successful exploitation could allow an attacker to disrupt services and negatively impact system availability.
{
"affected": [],
"aliases": [
"CVE-2026-23596"
],
"database_specific": {
"cwe_ids": [
"CWE-288",
"CWE-400"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-02-17T21:22:15Z",
"severity": "MODERATE"
},
"details": "A vulnerability in the management API of the affected product could allow an unauthenticated remote attacker to trigger service restarts. Successful exploitation could allow an attacker to disrupt services and negatively impact system availability.",
"id": "GHSA-8rh3-rvv2-3mr4",
"modified": "2026-02-17T21:31:15Z",
"published": "2026-02-17T21:31:14Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-23596"
},
{
"type": "WEB",
"url": "https://support.hpe.com/hpesc/public/docDisplay?docId=hpesbnw05002en_us\u0026docLocale=en_US"
}
],
"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-8RM2-7QQF-34QM
Vulnerability from github – Published: 2026-05-05 19:34 – Updated: 2026-06-08 16:22Impact
The remote read endpoint (/api/v1/read) does not validate the declared decoded length in a snappy-compressed request body before allocating memory.
An unauthenticated attacker can send a small payload that causes a huge heap allocation per request. Under concurrent load this can exhaust available memory and crash the Prometheus process.
Patches
Has the problem been patched? What versions should users upgrade to?
Fixed in 3.11.3 and 3.5.3 LTS. Users should upgrade to these versions or later.
Workarounds
User who can not upgrade can place Prometheus behind a reverse proxy or firewall that requires authentication before requests reach /api/v1/read.
{
"affected": [
{
"package": {
"ecosystem": "Go",
"name": "github.com/prometheus/prometheus"
},
"ranges": [
{
"events": [
{
"introduced": "0.306.0"
},
{
"fixed": "0.311.3"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "Go",
"name": "github.com/prometheus/prometheus"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "0.305.2"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "Go",
"name": "github.com/prometheus/prometheus"
},
"ranges": [
{
"events": [
{
"introduced": "1.0.0-rc.0"
},
{
"last_affected": "2.5.0"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2026-42154"
],
"database_specific": {
"cwe_ids": [
"CWE-400",
"CWE-789"
],
"github_reviewed": true,
"github_reviewed_at": "2026-05-05T19:34:05Z",
"nvd_published_at": "2026-05-04T19:16:04Z",
"severity": "HIGH"
},
"details": "### Impact\n\nThe remote read endpoint (`/api/v1/read`) does not validate the declared decoded length in a snappy-compressed request body before allocating memory.\nAn unauthenticated attacker can send a small payload that causes a huge heap allocation per request. Under concurrent load this can exhaust available memory and crash the Prometheus process.\n\n### Patches\n_Has the problem been patched? What versions should users upgrade to?_\n\nFixed in 3.11.3 and 3.5.3 LTS. Users should upgrade to these versions or later.\n\n### Workarounds\nUser who can not upgrade can place Prometheus behind a reverse proxy or firewall that requires authentication before requests reach /api/v1/read.",
"id": "GHSA-8rm2-7qqf-34qm",
"modified": "2026-06-08T16:22:14Z",
"published": "2026-05-05T19:34:05Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/prometheus/prometheus/security/advisories/GHSA-8rm2-7qqf-34qm"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-42154"
},
{
"type": "WEB",
"url": "https://github.com/prometheus/prometheus/pull/18584"
},
{
"type": "WEB",
"url": "https://github.com/prometheus/prometheus/pull/18585"
},
{
"type": "PACKAGE",
"url": "https://github.com/prometheus/prometheus"
},
{
"type": "WEB",
"url": "https://github.com/prometheus/prometheus/releases/tag/v3.11.3"
},
{
"type": "WEB",
"url": "https://github.com/prometheus/prometheus/releases/tag/v3.5.3"
}
],
"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": "Prometheus: Remote read endpoint allows denial of service via crafted snappy payload"
}
GHSA-8RM8-QF3C-Q22G
Vulnerability from github – Published: 2025-10-20 21:30 – Updated: 2025-10-21 15:30Hatching Triage Sandbox Windows 10 build 2004 (2025-08-14) and Windows 10 LTSC 2021(2025-08-14) contains a vulnerability in its Windows behavioral analysis engine that allows a submitted malware sample to evade detection and cause denial-of-analysis. The vulnerability is triggered when a sample recursively spawns a large number of child processes, generating high log volume and exhausting system resources. As a result, key malicious behavior, including PowerShell execution and reverse shell activity, may not be recorded or reported, misleading analysts and compromising the integrity and availability of sandboxed analysis results.
{
"affected": [],
"aliases": [
"CVE-2025-61303"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-10-20T21:15:38Z",
"severity": "CRITICAL"
},
"details": "Hatching Triage Sandbox Windows 10 build 2004 (2025-08-14) and Windows 10 LTSC 2021(2025-08-14) contains a vulnerability in its Windows behavioral analysis engine that allows a submitted malware sample to evade detection and cause denial-of-analysis. The vulnerability is triggered when a sample recursively spawns a large number of child processes, generating high log volume and exhausting system resources. As a result, key malicious behavior, including PowerShell execution and reverse shell activity, may not be recorded or reported, misleading analysts and compromising the integrity and availability of sandboxed analysis results.",
"id": "GHSA-8rm8-qf3c-q22g",
"modified": "2025-10-21T15:30:56Z",
"published": "2025-10-20T21:30:33Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-61303"
},
{
"type": "WEB",
"url": "https://github.com/eGkritsis/CVE-2025-61303"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-8RQ7-6H4W-W3XV
Vulnerability from github – Published: 2023-02-28 18:30 – Updated: 2023-03-09 21:30Dell PowerScale nodes A200, A2000, H400, H500, H600, H5600, F800, F810 integrated hardware management software contains an uncontrolled resource consumption vulnerability. This may allow an unauthenticated network host to impair built-in hardware management functionality and trigger OneFS data protection mechanism causing a denial of service.
{
"affected": [],
"aliases": [
"CVE-2023-23689"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2023-02-28T17:15:00Z",
"severity": "HIGH"
},
"details": "Dell PowerScale nodes A200, A2000, H400, H500, H600, H5600, F800, F810 integrated hardware management software contains an uncontrolled resource consumption vulnerability. This may allow an unauthenticated network host to impair built-in hardware management functionality and trigger OneFS data protection mechanism causing a denial of service.",
"id": "GHSA-8rq7-6h4w-w3xv",
"modified": "2023-03-09T21:30:19Z",
"published": "2023-02-28T18:30:18Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-23689"
},
{
"type": "WEB",
"url": "https://www.dell.com/support/kbdoc/en-us/000209895/dell-emc-powerscale-onefs-security-updates-for-multiple-security"
}
],
"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-8RQ7-QCXC-CH26
Vulnerability from github – Published: 2022-05-01 18:05 – Updated: 2025-04-09 03:41The OLE2 parser in Clam AntiVirus (ClamAV) allows remote attackers to cause a denial of service (resource consumption) via an OLE2 file with (1) a large property size or (2) a loop in the FAT file block chain that triggers an infinite loop, as demonstrated via a crafted DOC file.
{
"affected": [],
"aliases": [
"CVE-2007-2650"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2007-05-14T21:19:00Z",
"severity": "MODERATE"
},
"details": "The OLE2 parser in Clam AntiVirus (ClamAV) allows remote attackers to cause a denial of service (resource consumption) via an OLE2 file with (1) a large property size or (2) a loop in the FAT file block chain that triggers an infinite loop, as demonstrated via a crafted DOC file.",
"id": "GHSA-8rq7-qcxc-ch26",
"modified": "2025-04-09T03:41:33Z",
"published": "2022-05-01T18:05:40Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2007-2650"
},
{
"type": "WEB",
"url": "http://article.gmane.org/gmane.comp.security.virus.clamav.devel/2853"
},
{
"type": "WEB",
"url": "http://kolab.org/security/kolab-vendor-notice-15.txt"
},
{
"type": "WEB",
"url": "http://lurker.clamav.net/message/20070418.111144.0df6c5d3.en.html"
},
{
"type": "WEB",
"url": "http://secunia.com/advisories/25244"
},
{
"type": "WEB",
"url": "http://secunia.com/advisories/25523"
},
{
"type": "WEB",
"url": "http://secunia.com/advisories/25525"
},
{
"type": "WEB",
"url": "http://secunia.com/advisories/25553"
},
{
"type": "WEB",
"url": "http://secunia.com/advisories/25558"
},
{
"type": "WEB",
"url": "http://secunia.com/advisories/25688"
},
{
"type": "WEB",
"url": "http://secunia.com/advisories/25796"
},
{
"type": "WEB",
"url": "http://security.gentoo.org/glsa/glsa-200706-05.xml"
},
{
"type": "WEB",
"url": "http://svn.clamav.net/svn/clamav-devel/trunk/ChangeLog"
},
{
"type": "WEB",
"url": "http://www.debian.org/security/2007/dsa-1320"
},
{
"type": "WEB",
"url": "http://www.mandriva.com/security/advisories?name=MDKSA-2007:115"
},
{
"type": "WEB",
"url": "http://www.novell.com/linux/security/advisories/2007_33_clamav.html"
},
{
"type": "WEB",
"url": "http://www.securityfocus.com/bid/24316"
},
{
"type": "WEB",
"url": "http://www.trustix.org/errata/2007/0020"
},
{
"type": "WEB",
"url": "http://www.vupen.com/english/advisories/2007/1776"
}
],
"schema_version": "1.4.0",
"severity": []
}
GHSA-8RR4-RFC9-G589
Vulnerability from github – Published: 2023-03-27 18:30 – Updated: 2023-04-01 03:30Denial of Service in GitHub repository gpac/gpac prior to 2.4.0.
{
"affected": [],
"aliases": [
"CVE-2023-1654"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2023-03-27T16:15:00Z",
"severity": "HIGH"
},
"details": "Denial of Service in GitHub repository gpac/gpac prior to 2.4.0.",
"id": "GHSA-8rr4-rfc9-g589",
"modified": "2023-04-01T03:30:18Z",
"published": "2023-03-27T18:30:26Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-1654"
},
{
"type": "WEB",
"url": "https://github.com/gpac/gpac/commit/2c055153d401b8c49422971e3a0159869652d3da"
},
{
"type": "WEB",
"url": "https://huntr.dev/bounties/33652b56-128f-41a7-afcc-10641f69ff14"
},
{
"type": "WEB",
"url": "https://www.debian.org/security/2023/dsa-5411"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-8RX4-FXQ5-VJ4V
Vulnerability from github – Published: 2025-04-27 21:34 – Updated: 2025-11-06 15:14A vulnerability was found in Apereo CAS 5.2.6. It has been classified as problematic. This affects the function ResponseEntity of the file cas-5.2.6\webapp-mgmt\cas-management-webapp-support\src\main\java\org\apereo\cas\mgmt\services\web\ManageRegisteredServicesMultiActionController.java. The manipulation of the argument Query leads to inefficient regular expression complexity. It is possible to initiate the attack remotely. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
{
"affected": [
{
"package": {
"ecosystem": "Maven",
"name": "org.apereo.cas:cas-management-webapp-support"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "5.2.6"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2025-3985"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": true,
"github_reviewed_at": "2025-11-06T15:14:55Z",
"nvd_published_at": "2025-04-27T21:15:16Z",
"severity": "MODERATE"
},
"details": "A vulnerability was found in Apereo CAS 5.2.6. It has been classified as problematic. This affects the function ResponseEntity of the file cas-5.2.6\\webapp-mgmt\\cas-management-webapp-support\\src\\main\\java\\org\\apereo\\cas\\mgmt\\services\\web\\ManageRegisteredServicesMultiActionController.java. The manipulation of the argument Query leads to inefficient regular expression complexity. It is possible to initiate the attack remotely. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.",
"id": "GHSA-8rx4-fxq5-vj4v",
"modified": "2025-11-06T15:14:55Z",
"published": "2025-04-27T21:34:48Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-3985"
},
{
"type": "PACKAGE",
"url": "https://github.com/apereo/cas"
},
{
"type": "WEB",
"url": "https://vuldb.com/?ctiid.306321"
},
{
"type": "WEB",
"url": "https://vuldb.com/?id.306321"
},
{
"type": "WEB",
"url": "https://vuldb.com/?submit.557110"
},
{
"type": "WEB",
"url": "https://wx.mail.qq.com/s?k=lzDuxVkSRXUZ0bwZEG"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:L",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N",
"type": "CVSS_V4"
}
],
"summary": "Apereo CAS has inefficient regular expression complexity"
}
GHSA-8V46-5P7G-P46J
Vulnerability from github – Published: 2026-07-06 18:31 – Updated: 2026-07-07 21:31BeyondTrust Remote Support and Privileged Remote Access contain a high-severity pre-authentication vulnerability in the network communication subsystem. Insufficient validation of client-supplied input may allow an unauthenticated remote attacker to trigger a denial-of-service condition affecting appliance availability.
{
"affected": [],
"aliases": [
"CVE-2026-40140"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-07-06T17:16:31Z",
"severity": "HIGH"
},
"details": "BeyondTrust Remote Support and Privileged Remote Access contain a high-severity pre-authentication vulnerability in the network communication subsystem.\u00a0Insufficient validation of client-supplied input may allow an unauthenticated remote attacker to trigger a denial-of-service condition affecting appliance availability.",
"id": "GHSA-8v46-5p7g-p46j",
"modified": "2026-07-07T21:31:30Z",
"published": "2026-07-06T18:31:14Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-40140"
},
{
"type": "WEB",
"url": "https://www.beyondtrust.com/trust-center/security-advisories/bt26-03"
}
],
"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/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-8V4X-8GQ4-XPMQ
Vulnerability from github – Published: 2024-07-09 21:30 – Updated: 2024-07-09 21:30A vulnerability was discovered in Samsung Mobile Processor, Wearable Processor, and Modems with versions Exynos 9820, Exynos 9825, Exynos 980, Exynos 990, Exynos 850, Exynos 1080, Exynos 2100, Exynos 2200, Exynos 1280, Exynos 1380, Exynos 1330, Exynos 9110, Exynos W920, Exynos W930, Exynos Modem 5123, and Exynos Modem 5300 that involves incorrect authorization of LTE NAS messages and leads to downgrading to lower network generations and repeated DDOS.
{
"affected": [],
"aliases": [
"CVE-2024-29153"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-07-09T20:15:10Z",
"severity": "HIGH"
},
"details": "A vulnerability was discovered in Samsung Mobile Processor, Wearable Processor, and Modems with versions Exynos 9820, Exynos 9825, Exynos 980, Exynos 990, Exynos 850, Exynos 1080, Exynos 2100, Exynos 2200, Exynos 1280, Exynos 1380, Exynos 1330, Exynos 9110, Exynos W920, Exynos W930, Exynos Modem 5123, and Exynos Modem 5300 that involves incorrect authorization of LTE NAS messages and leads to downgrading to lower network generations and repeated DDOS.",
"id": "GHSA-8v4x-8gq4-xpmq",
"modified": "2024-07-09T21:30:37Z",
"published": "2024-07-09T21:30:37Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-29153"
},
{
"type": "WEB",
"url": "https://semiconductor.samsung.com/support/quality-support/product-security-updates"
},
{
"type": "WEB",
"url": "https://semiconductor.samsung.com/support/quality-support/product-security-updates/cve-2024-29153"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-8V5J-PWR7-W5F8
Vulnerability from github – Published: 2023-04-06 18:30 – Updated: 2025-02-12 18:31HTTP and MIME header parsing can allocate large amounts of memory, even when parsing small inputs, potentially leading to a denial of service. Certain unusual patterns of input data can cause the common function used to parse HTTP and MIME headers to allocate substantially more memory than required to hold the parsed headers. An attacker can exploit this behavior to cause an HTTP server to allocate large amounts of memory from a small request, potentially leading to memory exhaustion and a denial of service. With fix, header parsing now correctly allocates only the memory required to hold parsed headers.
{
"affected": [],
"aliases": [
"CVE-2023-24534"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2023-04-06T16:15:00Z",
"severity": "HIGH"
},
"details": "HTTP and MIME header parsing can allocate large amounts of memory, even when parsing small inputs, potentially leading to a denial of service. Certain unusual patterns of input data can cause the common function used to parse HTTP and MIME headers to allocate substantially more memory than required to hold the parsed headers. An attacker can exploit this behavior to cause an HTTP server to allocate large amounts of memory from a small request, potentially leading to memory exhaustion and a denial of service. With fix, header parsing now correctly allocates only the memory required to hold parsed headers.",
"id": "GHSA-8v5j-pwr7-w5f8",
"modified": "2025-02-12T18:31:21Z",
"published": "2023-04-06T18:30:21Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-24534"
},
{
"type": "WEB",
"url": "https://go.dev/cl/481994"
},
{
"type": "WEB",
"url": "https://go.dev/issue/58975"
},
{
"type": "WEB",
"url": "https://groups.google.com/g/golang-announce/c/Xdv6JL9ENs8"
},
{
"type": "WEB",
"url": "https://pkg.go.dev/vuln/GO-2023-1704"
},
{
"type": "WEB",
"url": "https://security.gentoo.org/glsa/202311-09"
},
{
"type": "WEB",
"url": "https://security.netapp.com/advisory/ntap-20230526-0007"
}
],
"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"
}
]
}
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.