CWE-400
DiscouragedUncontrolled Resource Consumption
Abstraction: Class · Status: Draft
The product does not properly control the allocation and maintenance of a limited resource.
5531 vulnerabilities reference this CWE, most recent first.
GHSA-7537-7Q22-H2H7
Vulnerability from github – Published: 2024-03-08 03:31 – Updated: 2026-04-02 21:31The issue was addressed with improved checks. This issue is fixed in iOS 16.7.6 and iPadOS 16.7.6, iOS 17.4 and iPadOS 17.4, macOS Sonoma 14.4. Processing web content may lead to a denial-of-service.
{
"affected": [],
"aliases": [
"CVE-2024-23259"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-03-08T02:15:48Z",
"severity": "MODERATE"
},
"details": "The issue was addressed with improved checks. This issue is fixed in iOS 16.7.6 and iPadOS 16.7.6, iOS 17.4 and iPadOS 17.4, macOS Sonoma 14.4. Processing web content may lead to a denial-of-service.",
"id": "GHSA-7537-7q22-h2h7",
"modified": "2026-04-02T21:31:37Z",
"published": "2024-03-08T03:31:25Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-23259"
},
{
"type": "WEB",
"url": "https://support.apple.com/en-us/120880"
},
{
"type": "WEB",
"url": "https://support.apple.com/en-us/120893"
},
{
"type": "WEB",
"url": "https://support.apple.com/en-us/120895"
},
{
"type": "WEB",
"url": "https://support.apple.com/en-us/HT214081"
},
{
"type": "WEB",
"url": "https://support.apple.com/en-us/HT214082"
},
{
"type": "WEB",
"url": "https://support.apple.com/en-us/HT214084"
},
{
"type": "WEB",
"url": "https://support.apple.com/kb/HT214081"
},
{
"type": "WEB",
"url": "https://support.apple.com/kb/HT214082"
},
{
"type": "WEB",
"url": "https://support.apple.com/kb/HT214084"
},
{
"type": "WEB",
"url": "http://seclists.org/fulldisclosure/2024/Mar/21"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-75FH-5JM2-JR94
Vulnerability from github – Published: 2022-05-17 02:25 – Updated: 2022-05-17 02:25The mod_dontdothat component of the mod_dav_svn Apache module in Subversion as packaged in Red Hat Enterprise Linux 5.11 does not properly detect recursion during entity expansion, which allows remote authenticated users with access to the webdav repository to cause a denial of service (memory consumption and httpd crash). NOTE: Exists as a regression to CVE-2009-1955.
{
"affected": [],
"aliases": [
"CVE-2016-6312"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2017-07-17T13:18:00Z",
"severity": "MODERATE"
},
"details": "The mod_dontdothat component of the mod_dav_svn Apache module in Subversion as packaged in Red Hat Enterprise Linux 5.11 does not properly detect recursion during entity expansion, which allows remote authenticated users with access to the webdav repository to cause a denial of service (memory consumption and httpd crash). NOTE: Exists as a regression to CVE-2009-1955.",
"id": "GHSA-75fh-5jm2-jr94",
"modified": "2022-05-17T02:25:46Z",
"published": "2022-05-17T02:25:46Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2016-6312"
},
{
"type": "WEB",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=1364122"
},
{
"type": "WEB",
"url": "http://www.securityfocus.com/bid/92320"
}
],
"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-75JX-33J6-76C5
Vulnerability from github – Published: 2022-05-13 01:04 – Updated: 2022-05-13 01:04The Gluster file system through versions 4.1.4 and 3.1.2 is vulnerable to a denial of service attack via use of the 'GF_XATTR_IOSTATS_DUMP_KEY' xattr. A remote, authenticated attacker could exploit this by mounting a Gluster volume and repeatedly calling 'setxattr(2)' to trigger a state dump and create an arbitrary number of files in the server's runtime directory.
{
"affected": [],
"aliases": [
"CVE-2018-14659"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2018-10-31T19:29:00Z",
"severity": "MODERATE"
},
"details": "The Gluster file system through versions 4.1.4 and 3.1.2 is vulnerable to a denial of service attack via use of the \u0027GF_XATTR_IOSTATS_DUMP_KEY\u0027 xattr. A remote, authenticated attacker could exploit this by mounting a Gluster volume and repeatedly calling \u0027setxattr(2)\u0027 to trigger a state dump and create an arbitrary number of files in the server\u0027s runtime directory.",
"id": "GHSA-75jx-33j6-76c5",
"modified": "2022-05-13T01:04:42Z",
"published": "2022-05-13T01:04:42Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2018-14659"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2018:3431"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2018:3432"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2018:3470"
},
{
"type": "WEB",
"url": "https://access.redhat.com/security/cve/CVE-2018-14659"
},
{
"type": "WEB",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=1635929"
},
{
"type": "WEB",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-14659"
},
{
"type": "WEB",
"url": "https://lists.debian.org/debian-lts-announce/2018/11/msg00003.html"
},
{
"type": "WEB",
"url": "https://lists.debian.org/debian-lts-announce/2021/11/msg00000.html"
},
{
"type": "WEB",
"url": "https://security.gentoo.org/glsa/201904-06"
}
],
"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-75M3-F4HR-2VH9
Vulnerability from github – Published: 2023-06-14 15:30 – Updated: 2023-06-27 19:48An issue was discovered jjson through 0.1.7 allows attackers to cause a denial of service or other unspecified impacts via crafted objects that deeply nested structures.
{
"affected": [
{
"package": {
"ecosystem": "Maven",
"name": "de.grobmeier.json:jjson"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "0.1.7"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2023-35110"
],
"database_specific": {
"cwe_ids": [
"CWE-400",
"CWE-787"
],
"github_reviewed": true,
"github_reviewed_at": "2023-06-14T21:11:23Z",
"nvd_published_at": "2023-06-14T14:15:10Z",
"severity": "HIGH"
},
"details": "An issue was discovered jjson through 0.1.7 allows attackers to cause a denial of service or other unspecified impacts via crafted objects that deeply nested structures.",
"id": "GHSA-75m3-f4hr-2vh9",
"modified": "2023-06-27T19:48:59Z",
"published": "2023-06-14T15:30:39Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-35110"
},
{
"type": "WEB",
"url": "https://github.com/grobmeier/jjson/issues/2"
},
{
"type": "PACKAGE",
"url": "https://github.com/grobmeier/jjson"
}
],
"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": "jjson vulnerable to stack exhaustion"
}
GHSA-75PP-9V48-FF5J
Vulnerability from github – Published: 2024-12-13 06:30 – Updated: 2024-12-13 06:30The Minify HTML plugin for WordPress is vulnerable to Regular Expression Denial of Service (ReDoS) in all versions up to, and including, 2.1.10. This is due to processing user-supplied input as a regular expression. This makes it possible for unauthenticated attackers to create comments that can cause catastrophic backtracking and break pages.
{
"affected": [],
"aliases": [
"CVE-2024-12579"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-12-13T05:15:07Z",
"severity": "MODERATE"
},
"details": "The Minify HTML plugin for WordPress is vulnerable to Regular Expression Denial of Service (ReDoS) in all versions up to, and including, 2.1.10. This is due to processing user-supplied input as a regular expression. This makes it possible for unauthenticated attackers to create comments that can cause catastrophic backtracking and break pages.",
"id": "GHSA-75pp-9v48-ff5j",
"modified": "2024-12-13T06:30:58Z",
"published": "2024-12-13T06:30:58Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-12579"
},
{
"type": "WEB",
"url": "https://plugins.trac.wordpress.org/changeset/3203890/minify-html-markup"
},
{
"type": "WEB",
"url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/80334e81-c33d-464c-9409-f49c34681890?source=cve"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N",
"type": "CVSS_V3"
}
]
}
GHSA-75QH-GG76-P2W4
Vulnerability from github – Published: 2024-08-27 19:55 – Updated: 2024-12-23 17:13A specifically crafted Wasm file can cause the VM to consume excessive amounts of memory when compiling a contract. This can lead to high memory usage, slowdowns, potentially a crash and can poison a lock in the VM, preventing any further interaction with contracts.
For more information, see CWA-2023-004.
{
"affected": [
{
"package": {
"ecosystem": "crates.io",
"name": "cosmwasm-vm"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1.2.8"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "crates.io",
"name": "cosmwasm-vm"
},
"ranges": [
{
"events": [
{
"introduced": "1.3.0"
},
{
"fixed": "1.3.4"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "crates.io",
"name": "cosmwasm-vm"
},
"ranges": [
{
"events": [
{
"introduced": "1.4.0"
},
{
"fixed": "1.4.2"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "crates.io",
"name": "cosmwasm-vm"
},
"ranges": [
{
"events": [
{
"introduced": "1.5.0"
},
{
"fixed": "1.5.1"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "Go",
"name": "github.com/CosmWasm/wasmvm"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1.2.5"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "Go",
"name": "github.com/CosmWasm/wasmvm"
},
"ranges": [
{
"events": [
{
"introduced": "1.3.0"
},
{
"fixed": "1.3.1"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "Go",
"name": "github.com/CosmWasm/wasmvm"
},
"ranges": [
{
"events": [
{
"introduced": "1.4.0"
},
{
"fixed": "1.4.2"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "Go",
"name": "github.com/CosmWasm/wasmvm"
},
"ranges": [
{
"events": [
{
"introduced": "1.5.0"
},
{
"fixed": "1.5.1"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": true,
"github_reviewed_at": "2024-08-27T19:55:40Z",
"nvd_published_at": null,
"severity": "MODERATE"
},
"details": "A specifically crafted Wasm file can cause the VM to consume excessive amounts of memory when compiling a contract.\nThis can lead to high memory usage, slowdowns, potentially a crash and can poison a lock in the VM,\npreventing any further interaction with contracts.\n\nFor more information, see [CWA-2023-004](https://github.com/CosmWasm/advisories/blob/main/CWAs/CWA-2023-004.md).\n",
"id": "GHSA-75qh-gg76-p2w4",
"modified": "2024-12-23T17:13:08Z",
"published": "2024-08-27T19:55:40Z",
"references": [
{
"type": "WEB",
"url": "https://forum.cosmos.network/t/high-severity-security-patch-upcoming-on-wed-10th-cwa-2023-004-brought-to-you-by-certik-and-confio/12840"
},
{
"type": "WEB",
"url": "https://github.com/CosmWasm/advisories/blob/main/CWAs/CWA-2023-004.md"
},
{
"type": "ADVISORY",
"url": "https://github.com/advisories/GHSA-75qh-gg76-p2w4"
},
{
"type": "WEB",
"url": "https://rustsec.org/advisories/RUSTSEC-2024-0366.html"
},
{
"type": "WEB",
"url": "https://www.certik.com/resources/blog/risk-and-security-enhancement-for-app-chains-an-in-depth-writeup-of-cwa-2023"
}
],
"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": "CWA-2023-004: Excessive number of function parameters in compiled Wasm"
}
GHSA-75R3-38RH-PMXV
Vulnerability from github – Published: 2023-06-14 15:30 – Updated: 2025-01-06 22:14An issue was discovered sojo through 1.1.1 allows attackers to cause a denial of service or other unspecified impacts via crafted object that uses cyclic dependencies.
{
"affected": [
{
"package": {
"ecosystem": "Maven",
"name": "net.sf.sojo:sojo"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "1.1.1"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2023-34613"
],
"database_specific": {
"cwe_ids": [
"CWE-400",
"CWE-787"
],
"github_reviewed": true,
"github_reviewed_at": "2023-06-14T21:10:32Z",
"nvd_published_at": "2023-06-14T14:15:10Z",
"severity": "HIGH"
},
"details": "An issue was discovered sojo through 1.1.1 allows attackers to cause a denial of service or other unspecified impacts via crafted object that uses cyclic dependencies.",
"id": "GHSA-75r3-38rh-pmxv",
"modified": "2025-01-06T22:14:00Z",
"published": "2023-06-14T15:30:38Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-34613"
},
{
"type": "WEB",
"url": "https://github.com/maddingo/sojo/issues/15"
},
{
"type": "PACKAGE",
"url": "https://github.com/maddingo/sojo"
}
],
"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": "sojo vulnerable to stack exhaustion"
}
GHSA-75R6-6JG8-PFCQ
Vulnerability from github – Published: 2024-05-13 14:10 – Updated: 2024-07-05 21:30Impact
This vulnerability can spike the resource utilization of the STS service, and combined with a significant traffic volume could potentially lead to a denial of service.
Patches
This vulnerability existed in the repository at HEAD, we will cut a 0.1.0 release with the fix.
Workarounds
None
References
None
{
"affected": [
{
"package": {
"ecosystem": "Go",
"name": "github.com/octo-sts/app"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "0.1.0"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2024-34079"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": true,
"github_reviewed_at": "2024-05-13T14:10:08Z",
"nvd_published_at": "2024-05-14T15:38:29Z",
"severity": "LOW"
},
"details": "### Impact\nThis vulnerability can spike the resource utilization of the STS service, and combined with a significant traffic volume could potentially lead to a denial of service.\n\n### Patches\nThis vulnerability existed in the repository at HEAD, we will cut a 0.1.0 release with the fix. \n\n### Workarounds\nNone\n\n### References\nNone\n",
"id": "GHSA-75r6-6jg8-pfcq",
"modified": "2024-07-05T21:30:36Z",
"published": "2024-05-13T14:10:08Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/octo-sts/app/security/advisories/GHSA-75r6-6jg8-pfcq"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-34079"
},
{
"type": "WEB",
"url": "https://github.com/octo-sts/app/commit/74ba874c017cf973edd6711144cf4399a9fcff57"
},
{
"type": "PACKAGE",
"url": "https://github.com/octo-sts/app"
}
],
"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:L",
"type": "CVSS_V3"
}
],
"summary": "octo-sts vulnerable to unauthenticated attacker causing unbounded CPU and memory usage"
}
GHSA-75RQ-4C5R-9CXV
Vulnerability from github – Published: 2022-05-24 19:11 – Updated: 2022-07-13 00:01An issue was discovered in Foxit PDF Reader before 11.0.1 and PDF Editor before 11.0.1. It allows stack consumption during recursive processing of embedded XML nodes.
{
"affected": [],
"aliases": [
"CVE-2021-38566"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2021-08-11T22:15:00Z",
"severity": "HIGH"
},
"details": "An issue was discovered in Foxit PDF Reader before 11.0.1 and PDF Editor before 11.0.1. It allows stack consumption during recursive processing of embedded XML nodes.",
"id": "GHSA-75rq-4c5r-9cxv",
"modified": "2022-07-13T00:01:35Z",
"published": "2022-05-24T19:11:01Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2021-38566"
},
{
"type": "WEB",
"url": "https://www.foxitsoftware.com/support/security-bulletins.php"
}
],
"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-7642-F8GH-QXJJ
Vulnerability from github – Published: 2026-04-21 21:31 – Updated: 2026-04-21 21:31Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Group Replication Plugin). Supported versions that are affected are 8.0.0-8.0.45, 8.4.0-8.4.8 and 9.0.0-9.6.0. Easily exploitable vulnerability allows low privileged attacker with network access via multiple protocols to compromise MySQL Server. Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of MySQL Server. CVSS 3.1 Base Score 6.5 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H).
{
"affected": [],
"aliases": [
"CVE-2026-34270"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-04-21T21:16:30Z",
"severity": "MODERATE"
},
"details": "Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Group Replication Plugin). Supported versions that are affected are 8.0.0-8.0.45, 8.4.0-8.4.8 and 9.0.0-9.6.0. Easily exploitable vulnerability allows low privileged attacker with network access via multiple protocols to compromise MySQL Server. Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of MySQL Server. CVSS 3.1 Base Score 6.5 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H).",
"id": "GHSA-7642-f8gh-qxjj",
"modified": "2026-04-21T21:31:25Z",
"published": "2026-04-21T21:31:25Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-34270"
},
{
"type": "WEB",
"url": "https://www.oracle.com/security-alerts/cpuapr2026.html"
}
],
"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"
}
]
}
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.