CWE-400
DiscouragedUncontrolled Resource Consumption
Abstraction: Class · Status: Draft
The product does not properly control the allocation and maintenance of a limited resource.
5567 vulnerabilities reference this CWE, most recent first.
GHSA-F3PM-M5M9-45GW
Vulnerability from github – Published: 2022-05-24 19:03 – Updated: 2022-08-11 00:00A flaw was found in spice in versions before 0.14.92. A DoS tool might make it easier for remote attackers to cause a denial of service (CPU consumption) by performing many renegotiations within a single connection.
{
"affected": [],
"aliases": [
"CVE-2021-20201"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2021-05-28T11:15:00Z",
"severity": "HIGH"
},
"details": "A flaw was found in spice in versions before 0.14.92. A DoS tool might make it easier for remote attackers to cause a denial of service (CPU consumption) by performing many renegotiations within a single connection.",
"id": "GHSA-f3pm-m5m9-45gw",
"modified": "2022-08-11T00:00:29Z",
"published": "2022-05-24T19:03:38Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2021-20201"
},
{
"type": "WEB",
"url": "https://blog.qualys.com/product-tech/2011/10/31/tls-renegotiation-and-denial-of-service-attacks"
},
{
"type": "WEB",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=1921846"
},
{
"type": "WEB",
"url": "https://security.gentoo.org/glsa/202208-10"
}
],
"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:L",
"type": "CVSS_V3"
}
]
}
GHSA-F3QJ-WR66-G552
Vulnerability from github – Published: 2026-06-03 00:30 – Updated: 2026-06-03 21:30Dräger Core 1.0.5 and Dräger M540 Converter Service 1.0.9 contain a denial of service vulnerability that allows network-adjacent attackers to trigger high CPU load by sending specially crafted, unencrypted SDC messages during the discovery process. Attackers with access to the hospital network can send malformed SDC packets to exhaust CPU resources in the affected process, causing further SDC messages to no longer be processed.
{
"affected": [],
"aliases": [
"CVE-2024-14036"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-06-02T22:16:15Z",
"severity": "HIGH"
},
"details": "Dr\u00e4ger Core 1.0.5 and Dr\u00e4ger M540 Converter Service 1.0.9 contain a denial of service vulnerability that allows network-adjacent attackers to trigger high CPU load by sending specially crafted, unencrypted SDC messages during the discovery process. Attackers with access to the hospital network can send malformed SDC packets to exhaust CPU resources in the affected process, causing further SDC messages to no longer be processed.",
"id": "GHSA-f3qj-wr66-g552",
"modified": "2026-06-03T21:30:28Z",
"published": "2026-06-03T00:30:25Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-14036"
},
{
"type": "WEB",
"url": "https://static.draeger.com/security"
},
{
"type": "WEB",
"url": "https://static.draeger.com/security/download/PSA-24-110-1-gSOAP-Product-Security-Advisory.pdf"
},
{
"type": "WEB",
"url": "https://www.vulncheck.com/advisories/dr-ger-core-denial-of-service-via-malformed-sdc-message"
}
],
"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-F3X9-2XRG-95G2
Vulnerability from github – Published: 2022-05-01 18:26 – Updated: 2022-05-01 18:26Stack consumption vulnerability in AkkyWareHOUSE 7-zip32.dll before 4.42.00.04, as derived from Igor Pavlov 7-Zip before 4.53 beta, allows user-assisted remote attackers to execute arbitrary code via a long filename in an archive, leading to a heap-based buffer overflow.
{
"affected": [],
"aliases": [
"CVE-2007-4725"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2007-09-05T19:17:00Z",
"severity": "MODERATE"
},
"details": "Stack consumption vulnerability in AkkyWareHOUSE 7-zip32.dll before 4.42.00.04, as derived from Igor Pavlov 7-Zip before 4.53 beta, allows user-assisted remote attackers to execute arbitrary code via a long filename in an archive, leading to a heap-based buffer overflow.",
"id": "GHSA-f3x9-2xrg-95g2",
"modified": "2022-05-01T18:26:30Z",
"published": "2022-05-01T18:26:30Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2007-4725"
},
{
"type": "WEB",
"url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/36459"
},
{
"type": "WEB",
"url": "http://akky.cjb.net/security/7-zip3.txt"
},
{
"type": "WEB",
"url": "http://jvn.jp/jp/JVN%2362868899/index.html"
},
{
"type": "WEB",
"url": "http://osvdb.org/40482"
},
{
"type": "WEB",
"url": "http://secunia.com/advisories/26624"
},
{
"type": "WEB",
"url": "http://sourceforge.net/project/shownotes.php?release_id=535160\u0026group_id=14481"
},
{
"type": "WEB",
"url": "http://www.securityfocus.com/bid/25545"
},
{
"type": "WEB",
"url": "http://www.vupen.com/english/advisories/2007/3086"
}
],
"schema_version": "1.4.0",
"severity": []
}
GHSA-F42H-PJ3V-GMW8
Vulnerability from github – Published: 2024-12-09 15:31 – Updated: 2024-12-09 15:31Dell PowerScale OneFS Versions 9.5.0.x through 9.8.0.x contain an uncontrolled resource consumption vulnerability. A low privilege remote attacker could potentially exploit this vulnerability, leading to denial of service.
{
"affected": [],
"aliases": [
"CVE-2024-42426"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-12-09T15:15:15Z",
"severity": "MODERATE"
},
"details": "Dell PowerScale OneFS Versions 9.5.0.x through 9.8.0.x contain an uncontrolled resource consumption vulnerability. A low privilege remote attacker could potentially exploit this vulnerability, leading to denial of service.",
"id": "GHSA-f42h-pj3v-gmw8",
"modified": "2024-12-09T15:31:37Z",
"published": "2024-12-09T15:31:37Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-42426"
},
{
"type": "WEB",
"url": "https://www.dell.com/support/kbdoc/en-in/000256645/dsa-2024-453-security-update-for-dell-powerscale-onefs-multiple-security-vulnerabilities"
}
],
"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:L",
"type": "CVSS_V3"
}
]
}
GHSA-F44P-C7W9-7XR7
Vulnerability from github – Published: 2026-03-31 23:54 – Updated: 2026-04-28 18:22Summary
The gateway accepted unbounded concurrent unauthenticated WebSocket upgrades before allocating them to an authenticated session budget.
Impact
An unauthenticated network attacker could consume socket and worker capacity and disrupt WebSocket availability for legitimate clients.
Affected Component
src/gateway/server-http.ts, src/gateway/server/preauth-connection-budget.ts
Fixed Versions
- Affected:
<= 2026.3.24 - Patched:
>= 2026.3.28 - Latest stable
2026.3.28contains the fix.
Fix
Fixed by commit cb5f7e201f (gateway: cap concurrent pre-auth websocket upgrades).
Discovered by：Topsec AlphaLab (wang dong)
{
"affected": [
{
"database_specific": {
"last_known_affected_version_range": "\u003c= 2026.3.24"
},
"package": {
"ecosystem": "npm",
"name": "openclaw"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2026.3.28"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2026-41399"
],
"database_specific": {
"cwe_ids": [
"CWE-400",
"CWE-770"
],
"github_reviewed": true,
"github_reviewed_at": "2026-03-31T23:54:00Z",
"nvd_published_at": null,
"severity": "MODERATE"
},
"details": "## Summary\n\nThe gateway accepted unbounded concurrent unauthenticated WebSocket upgrades before allocating them to an authenticated session budget.\n\n## Impact\n\nAn unauthenticated network attacker could consume socket and worker capacity and disrupt WebSocket availability for legitimate clients.\n\n## Affected Component\n\n`src/gateway/server-http.ts, src/gateway/server/preauth-connection-budget.ts`\n\n## Fixed Versions\n\n- Affected: `\u003c= 2026.3.24`\n- Patched: `\u003e= 2026.3.28`\n- Latest stable `2026.3.28` contains the fix.\n\n## Fix\n\nFixed by commit `cb5f7e201f` (`gateway: cap concurrent pre-auth websocket upgrades`).\n\nDiscovered by\uff1aTopsec AlphaLab (wang dong)",
"id": "GHSA-f44p-c7w9-7xr7",
"modified": "2026-04-28T18:22:27Z",
"published": "2026-03-31T23:54:00Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/openclaw/openclaw/security/advisories/GHSA-f44p-c7w9-7xr7"
},
{
"type": "WEB",
"url": "https://github.com/openclaw/openclaw/commit/cb5f7e201f3f86ad70e199ef850e636b4cc457ba"
},
{
"type": "PACKAGE",
"url": "https://github.com/openclaw/openclaw"
}
],
"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:L/SC:N/SI:N/SA:N",
"type": "CVSS_V4"
}
],
"summary": "OpenClaw: Gateway WebSocket Denial of Service via unbounded pre-auth upgrades"
}
GHSA-F44Q-634C-JVWV
Vulnerability from github – Published: 2022-12-07 23:23 – Updated: 2023-07-14 21:52Impact
Versions older than v0.38.0 of js-libp2p are vulnerable to targeted resource exhaustion attacks. These attacks target libp2p’s connection, stream, peer, and memory management. An attacker can cause the allocation of large amounts of memory, ultimately leading to the process getting killed by the host’s operating system. While a connection manager tasked with keeping the number of connections within manageable limits has been part of js-libp2p, this component was designed to handle the regular churn of peers, not a targeted resource exhaustion attack.
Patches (What to do as a js-libp2p consumer:)
Update your js-libp2p dependency to v0.38.0 or greater.
Workarounds
There are no workarounds, and so we recommend to upgrade your js-libp2p version. Some range of attacks can be mitigated using OS tools (like manually blocking malicious peers using iptables or ufw ) or making use of a load balancer in front of libp2p nodes. You can also use the allow deny list in js-libp2p to deny specific peers.
However these require direct action & responsibility on your part and are no substitutes for upgrading js-libp2p. Therefore, we highly recommend upgrading your js-libp2p version for the way it enables tighter scoped limits and provides visibility into and easier reasoning about js-libp2p resource utilization.
References
- DoS Mitigation page for more information on how to incorporate mitigation strategies, monitor your application, and respond to attacks: https://docs.libp2p.io/reference/dos-mitigation/.
- Documentation on how to configure limits to prevent excessive resource consumption: https://github.com/libp2p/js-libp2p/blob/master/doc/LIMITS.md
- Documentation on how to configure metrics: https://github.com/libp2p/js-libp2p/blob/master/doc/METRICS.md
Please see the related disclosure for go-libp2p: https://github.com/libp2p/go-libp2p/security/advisories/GHSA-j7qp-mfxf-8xjw and rust-libp2p: https://github.com/libp2p/rust-libp2p/security/advisories/GHSA-jvgw-gccv-q5p8
For more information
If you have any questions or comments about this advisory, please email us at security@libp2p.io.
{
"affected": [
{
"package": {
"ecosystem": "npm",
"name": "libp2p"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "0.38.0"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2022-23487"
],
"database_specific": {
"cwe_ids": [
"CWE-400",
"CWE-770"
],
"github_reviewed": true,
"github_reviewed_at": "2022-12-07T23:23:59Z",
"nvd_published_at": "2022-12-07T21:15:00Z",
"severity": "HIGH"
},
"details": "### Impact\nVersions older than `v0.38.0` of js-libp2p are vulnerable to targeted resource exhaustion attacks. These attacks target libp2p\u2019s connection, stream, peer, and memory management. An attacker can cause the allocation of large amounts of memory, ultimately leading to the process getting killed by the host\u2019s operating system. While a connection manager tasked with keeping the number of connections within manageable limits has been part of js-libp2p, this component was designed to handle the regular churn of peers, not a targeted resource exhaustion attack.\n\n### Patches (What to do as a js-libp2p consumer:)\nUpdate your js-libp2p dependency to `v0.38.0` or greater.\n\n### Workarounds\nThere are no workarounds, and so we recommend to upgrade your js-libp2p version.\nSome range of attacks can be mitigated using OS tools (like manually blocking malicious peers using iptables or ufw ) or making use of a load balancer in front of libp2p nodes.\nYou can also use the [allow deny list in js-libp2p](https://docs.libp2p.io/concepts/security/dos-mitigation/#deny-specific-peers-or-create-an-allow-list-of-trusted-peers) to deny specific peers.\n\nHowever these require direct action \u0026 responsibility on your part and are no substitutes for upgrading js-libp2p. Therefore, we highly recommend upgrading your js-libp2p version for the way it enables tighter scoped limits and provides visibility into and easier reasoning about js-libp2p resource utilization.\n\n### References\n* DoS Mitigation page for more information on how to incorporate mitigation strategies, monitor your application, and respond to attacks: https://docs.libp2p.io/reference/dos-mitigation/. \n* Documentation on how to configure limits to prevent excessive resource consumption: https://github.com/libp2p/js-libp2p/blob/master/doc/LIMITS.md\n* Documentation on how to configure metrics: https://github.com/libp2p/js-libp2p/blob/master/doc/METRICS.md\n\nPlease see the related disclosure for go-libp2p: https://github.com/libp2p/go-libp2p/security/advisories/GHSA-j7qp-mfxf-8xjw and rust-libp2p: https://github.com/libp2p/rust-libp2p/security/advisories/GHSA-jvgw-gccv-q5p8 \n\n#### For more information\n\nIf you have any questions or comments about this advisory, please email us at [security@libp2p.io](mailto:security@libp2p.io).",
"id": "GHSA-f44q-634c-jvwv",
"modified": "2023-07-14T21:52:56Z",
"published": "2022-12-07T23:23:59Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/libp2p/js-libp2p/security/advisories/GHSA-f44q-634c-jvwv"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2022-23487"
},
{
"type": "PACKAGE",
"url": "https://github.com/libp2p/js-libp2p"
}
],
"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": "libp2p DoS vulnerability from lack of resource management"
}
GHSA-F46H-MH94-F4W2
Vulnerability from github – Published: 2022-05-24 17:42 – Updated: 2022-10-25 19:00Any git operation is passed through Jetty and a session is created. No expiry is set for the session and Jetty does not automatically dispose of the session. Over multiple git actions, this can lead to a heap memory exhaustion for Gerrit servers. We recommend upgrading Gerrit to any of the versions listed above.
{
"affected": [],
"aliases": [
"CVE-2021-22553"
],
"database_specific": {
"cwe_ids": [
"CWE-400",
"CWE-772"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2021-02-17T12:15:00Z",
"severity": "HIGH"
},
"details": "Any git operation is passed through Jetty and a session is created. No expiry is set for the session and Jetty does not automatically dispose of the session. Over multiple git actions, this can lead to a heap memory exhaustion for Gerrit servers. We recommend upgrading Gerrit to any of the versions listed above.",
"id": "GHSA-f46h-mh94-f4w2",
"modified": "2022-10-25T19:00:30Z",
"published": "2022-05-24T17:42:32Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2021-22553"
},
{
"type": "WEB",
"url": "https://bugs.chromium.org/p/gerrit/issues/detail?id=13858"
}
],
"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-F48G-WQMG-9R45
Vulnerability from github – Published: 2024-08-08 12:30 – Updated: 2024-08-08 12:30A Denial of Service (DoS) condition has been discovered in GitLab CE/EE affecting all versions starting with 15.9 before 17.0.6, 17.1 prior to 17.1.4, and 17.2 prior to 17.2.2. It is possible for an attacker to cause catastrophic backtracking while parsing results from Elasticsearch.
{
"affected": [],
"aliases": [
"CVE-2024-7610"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-08-08T11:15:13Z",
"severity": "MODERATE"
},
"details": "A Denial of Service (DoS) condition has been discovered in GitLab CE/EE affecting all versions starting with 15.9 before 17.0.6, 17.1 prior to 17.1.4, and 17.2 prior to 17.2.2. It is possible for an attacker to cause catastrophic backtracking while parsing results from Elasticsearch.",
"id": "GHSA-f48g-wqmg-9r45",
"modified": "2024-08-08T12:30:35Z",
"published": "2024-08-08T12:30:35Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-7610"
},
{
"type": "WEB",
"url": "https://gitlab.com/gitlab-org/gitlab/-/issues/468917"
}
],
"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:L",
"type": "CVSS_V3"
}
]
}
GHSA-F499-J7P4-WM44
Vulnerability from github – Published: 2026-03-26 18:31 – Updated: 2026-03-26 18:31Mattermost Plugins versions <=11.4 11.0.4 11.1.3 11.3.2 10.11.11.0 fail to validate incoming request size which allows an authenticated attacker to cause service disruption via the webhook endpoint. Mattermost Advisory ID: MMSA-2026-00589
{
"affected": [],
"aliases": [
"CVE-2026-3116"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-03-26T17:16:42Z",
"severity": "MODERATE"
},
"details": "Mattermost Plugins versions \u003c=11.4 11.0.4 11.1.3 11.3.2 10.11.11.0 fail to validate incoming request size which allows an authenticated attacker to cause service disruption via the webhook endpoint. Mattermost Advisory ID: MMSA-2026-00589",
"id": "GHSA-f499-j7p4-wm44",
"modified": "2026-03-26T18:31:42Z",
"published": "2026-03-26T18:31:42Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-3116"
},
{
"type": "WEB",
"url": "https://mattermost.com/security-updates"
}
],
"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:H",
"type": "CVSS_V3"
}
]
}
GHSA-F4JQ-8GQC-63V2
Vulnerability from github – Published: 2025-02-13 00:33 – Updated: 2025-02-14 18:30An issue in the profile image upload function of LearnDash v6.7.1 allows attackers to cause a Denial of Service (DoS) via excessive file uploads.
{
"affected": [],
"aliases": [
"CVE-2024-56940"
],
"database_specific": {
"cwe_ids": [
"CWE-400",
"CWE-770"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-02-12T22:15:40Z",
"severity": "HIGH"
},
"details": "An issue in the profile image upload function of LearnDash v6.7.1 allows attackers to cause a Denial of Service (DoS) via excessive file uploads.",
"id": "GHSA-f4jq-8gqc-63v2",
"modified": "2025-02-14T18:30:49Z",
"published": "2025-02-13T00:33:07Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-56940"
},
{
"type": "WEB",
"url": "https://github.com/nikolas-ch/CVEs/tree/main/LearnDash_v6.7.1"
}
],
"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.