CWE-400
DiscouragedUncontrolled Resource Consumption
Abstraction: Class · Status: Draft
The product does not properly control the allocation and maintenance of a limited resource.
6200 vulnerabilities reference this CWE, most recent first.
GHSA-47R2-R67P-RGW9
Vulnerability from github – Published: 2022-05-24 17:17 – Updated: 2023-08-16 18:30A vulnerability in the implementation of the Border Gateway Protocol (BGP) module in Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition. The vulnerability is due to incorrect processing of certain BGP packets. An attacker could exploit this vulnerability by sending a crafted BGP packet. A successful exploit could allow the attacker to cause a DoS condition on the affected device.
{
"affected": [],
"aliases": [
"CVE-2020-3305"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2020-05-06T17:15:00Z",
"severity": "HIGH"
},
"details": "A vulnerability in the implementation of the Border Gateway Protocol (BGP) module in Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition. The vulnerability is due to incorrect processing of certain BGP packets. An attacker could exploit this vulnerability by sending a crafted BGP packet. A successful exploit could allow the attacker to cause a DoS condition on the affected device.",
"id": "GHSA-47r2-r67p-rgw9",
"modified": "2023-08-16T18:30:18Z",
"published": "2022-05-24T17:17:19Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2020-3305"
},
{
"type": "WEB",
"url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asa-dos-P43GCE5j"
}
],
"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-47R3-9WVW-VMVM
Vulnerability from github – Published: 2022-05-24 17:00 – Updated: 2024-04-04 02:38reddcoin through 2.1.0.5 (a chain-based proof-of-stake cryptocurrency) allows a remote denial of service, exploitable by an attacker who acquires even a small amount of stake/coins in the system. The attacker sends invalid headers/blocks, which are stored on the victim's disk.
{
"affected": [],
"aliases": [
"CVE-2018-19164"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2019-11-05T21:15:00Z",
"severity": "HIGH"
},
"details": "reddcoin through 2.1.0.5 (a chain-based proof-of-stake cryptocurrency) allows a remote denial of service, exploitable by an attacker who acquires even a small amount of stake/coins in the system. The attacker sends invalid headers/blocks, which are stored on the victim\u0027s disk.",
"id": "GHSA-47r3-9wvw-vmvm",
"modified": "2024-04-04T02:38:16Z",
"published": "2022-05-24T17:00:20Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2018-19164"
},
{
"type": "WEB",
"url": "https://medium.com/%40dsl_uiuc/fake-stake-attacks-on-chain-based-proof-of-stake-cryptocurrencies-b8b05723f806"
},
{
"type": "WEB",
"url": "https://medium.com/@dsl_uiuc/fake-stake-attacks-on-chain-based-proof-of-stake-cryptocurrencies-b8b05723f806"
},
{
"type": "WEB",
"url": "http://fc19.ifca.ai/preproceedings/180-preproceedings.pdf"
}
],
"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-47VP-XCRQ-F264
Vulnerability from github – Published: 2026-08-19 21:30 – Updated: 2026-08-19 21:30IBM AIX 7.2, and 7.3 and IBM PowerVM VIOS 4.1 could allow a remote attacker to cause a denial of service due to unbounded recursion.
{
"affected": [],
"aliases": [
"CVE-2026-16824"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-08-19T20:17:02Z",
"severity": "HIGH"
},
"details": "IBM AIX 7.2, and 7.3 and IBM PowerVM VIOS 4.1 could allow a remote attacker to cause a denial of service due to unbounded recursion.",
"id": "GHSA-47vp-xcrq-f264",
"modified": "2026-08-19T21:30:34Z",
"published": "2026-08-19T21:30:33Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-16824"
},
{
"type": "WEB",
"url": "https://www.ibm.com/support/pages/node/7283858"
}
],
"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-47VR-832F-CRM9
Vulnerability from github – Published: 2022-05-24 17:46 – Updated: 2022-08-06 00:00An uncontrolled resource consumption (memory leak) flaw was found in the ZeroMQ client in versions before 4.3.3 in src/pipe.cpp. This issue causes a client that connects to multiple malicious or compromised servers to crash. The highest threat from this vulnerability is to system availability.
{
"affected": [],
"aliases": [
"CVE-2021-20234"
],
"database_specific": {
"cwe_ids": [
"CWE-400",
"CWE-401"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2021-04-01T14:15:00Z",
"severity": "MODERATE"
},
"details": "An uncontrolled resource consumption (memory leak) flaw was found in the ZeroMQ client in versions before 4.3.3 in src/pipe.cpp. This issue causes a client that connects to multiple malicious or compromised servers to crash. The highest threat from this vulnerability is to system availability.",
"id": "GHSA-47vr-832f-crm9",
"modified": "2022-08-06T00:00:40Z",
"published": "2022-05-24T17:46:03Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/zeromq/libzmq/security/advisories/GHSA-wfr2-29gj-5w87"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2021-20234"
},
{
"type": "WEB",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=1921972"
}
],
"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-47VX-FQR5-J2GW
Vulnerability from github – Published: 2022-12-16 21:30 – Updated: 2022-12-22 22:03A vulnerability classified as problematic was found in Dromara HuTool up to 5.8.10. This vulnerability affects unknown code of the file cn.hutool.core.util.ZipUtil.java. The manipulation leads to resource consumption. The attack can be initiated remotely. The exploit has been disclosed to the public and may be used. Upgrading to version 5.8.11 is able to address this issue. It is recommended to upgrade the affected component.
{
"affected": [
{
"package": {
"ecosystem": "Maven",
"name": "cn.hutool:hutool-core"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "5.8.11"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2022-4565"
],
"database_specific": {
"cwe_ids": [
"CWE-400",
"CWE-404"
],
"github_reviewed": true,
"github_reviewed_at": "2022-12-16T21:56:55Z",
"nvd_published_at": "2022-12-16T19:15:00Z",
"severity": "HIGH"
},
"details": "A vulnerability classified as problematic was found in Dromara HuTool up to 5.8.10. This vulnerability affects unknown code of the file cn.hutool.core.util.ZipUtil.java. The manipulation leads to resource consumption. The attack can be initiated remotely. The exploit has been disclosed to the public and may be used. Upgrading to version 5.8.11 is able to address this issue. It is recommended to upgrade the affected component.",
"id": "GHSA-47vx-fqr5-j2gw",
"modified": "2022-12-22T22:03:02Z",
"published": "2022-12-16T21:30:44Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2022-4565"
},
{
"type": "WEB",
"url": "https://github.com/dromara/hutool/issues/2797"
},
{
"type": "PACKAGE",
"url": "https://github.com/dromara/hutool"
},
{
"type": "WEB",
"url": "https://vuldb.com/?id.215974"
}
],
"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": "HuTool vulnerable to Uncontrolled Resource Consumption"
}
GHSA-4822-JVWX-W47H
Vulnerability from github – Published: 2022-04-01 18:16 – Updated: 2022-11-28 16:18Impact
Synapse before 1.52.0 with URL preview functionality enabled will attempt to generate URL previews for media stream URLs without properly limiting connection time. Connections will only be terminated after max_spider_size (default: 10M) bytes have been downloaded, which can in some cases lead to long-lived connections towards the streaming media server (for instance, Icecast).
This can cause excessive traffic and connections toward such servers if their stream URL is, for example, posted to a large room with many Synapse instances with URL preview enabled.
Patches
1.52.0 implements a timeout mechanism which will terminate URL preview connections after 30 seconds. Since generating URL previews for media streams is not supported and always fails, 1.53.0 additionally implements an allow list for content types for which Synapse will even attempt to generate a URL preview.
We recommend upgrading to 1.53.0 to fully resolve the issue.
Workarounds
Turn off URL preview functionality by setting url_preview_enabled: false in the Synapse configuration file.
References
- Patch (timeout): https://github.com/matrix-org/synapse/pull/11784
- Patch (content type allow list): https://github.com/matrix-org/synapse/pull/11936
For more information
If you have any questions or comments about this advisory, e-mail us at security@matrix.org.
{
"affected": [
{
"package": {
"ecosystem": "PyPI",
"name": "matrix-synapse"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1.53.0"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2022-41952"
],
"database_specific": {
"cwe_ids": [
"CWE-400",
"CWE-772"
],
"github_reviewed": true,
"github_reviewed_at": "2022-04-01T18:16:42Z",
"nvd_published_at": "2022-11-22T16:15:00Z",
"severity": "MODERATE"
},
"details": "### Impact\n\nSynapse before 1.52.0 with URL preview functionality enabled will attempt to generate URL previews for media stream URLs without properly limiting connection time. Connections will only be terminated after `max_spider_size` (default: 10M) bytes have been downloaded, which can in some cases lead to long-lived connections towards the streaming media server (for instance, Icecast).\n\nThis can cause excessive traffic and connections toward such servers if their stream URL is, for example, posted to a large room with many Synapse instances with URL preview enabled.\n\n### Patches\n1.52.0 implements a timeout mechanism which will terminate URL preview connections after 30 seconds. Since generating URL previews for media streams is not supported and always fails, 1.53.0 additionally implements an allow list for content types for which Synapse will even attempt to generate a URL preview.\n\nWe recommend upgrading to 1.53.0 to fully resolve the issue.\n\n### Workarounds\nTurn off URL preview functionality by setting `url_preview_enabled: false` in the Synapse configuration file.\n\n### References\n- Patch (timeout): https://github.com/matrix-org/synapse/pull/11784\n- Patch (content type allow list): https://github.com/matrix-org/synapse/pull/11936\n\n### For more information\nIf you have any questions or comments about this advisory, e-mail us at security@matrix.org.\n",
"id": "GHSA-4822-jvwx-w47h",
"modified": "2022-11-28T16:18:30Z",
"published": "2022-04-01T18:16:42Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/matrix-org/synapse/security/advisories/GHSA-4822-jvwx-w47h"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2022-41952"
},
{
"type": "WEB",
"url": "https://github.com/matrix-org/synapse/pull/11784"
},
{
"type": "WEB",
"url": "https://github.com/matrix-org/synapse/pull/11936"
},
{
"type": "PACKAGE",
"url": "https://github.com/matrix-org/synapse"
},
{
"type": "WEB",
"url": "https://github.com/matrix-org/synapse/releases/tag/v1.52.0"
},
{
"type": "WEB",
"url": "https://github.com/matrix-org/synapse/releases/tag/v1.53.0"
}
],
"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": "Uncontrolled Resource Consumption in Matrix Synapse"
}
GHSA-482H-W5QP-GFXW
Vulnerability from github – Published: 2024-08-22 06:30 – Updated: 2024-08-22 15:31An issue was discovered in UCI IDOL 2 (aka uciIDOL or IDOL2) through 2.12. Due to improper input validation, improper deserialization, and improper restriction of operations within the bounds of a memory buffer, IDOL2 is vulnerable to Denial-of-Service (DoS) attacks and possibly remote code execution. There is an access violation and EIP overwrite after five logins.
{
"affected": [],
"aliases": [
"CVE-2024-45166"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-08-22T04:15:24Z",
"severity": "CRITICAL"
},
"details": "An issue was discovered in UCI IDOL 2 (aka uciIDOL or IDOL2) through 2.12. Due to improper input validation, improper deserialization, and improper restriction of operations within the bounds of a memory buffer, IDOL2 is vulnerable to Denial-of-Service (DoS) attacks and possibly remote code execution. There is an access violation and EIP overwrite after five logins.",
"id": "GHSA-482h-w5qp-gfxw",
"modified": "2024-08-22T15:31:18Z",
"published": "2024-08-22T06:30:29Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-45166"
},
{
"type": "WEB",
"url": "https://uci.de/download/idol2-client.html"
},
{
"type": "WEB",
"url": "https://uci.de/products/index.html"
},
{
"type": "WEB",
"url": "https://www.syss.de/en/responsible-disclosure-policy"
},
{
"type": "WEB",
"url": "https://www.syss.de/fileadmin/dokumente/Publikationen/Advisories/SYSS-2024-050.txt"
},
{
"type": "WEB",
"url": "http://download.uci.de/idol2/idol2Client_2_12.exe"
}
],
"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-482R-2G94-J6QR
Vulnerability from github – Published: 2022-05-24 17:20 – Updated: 2022-05-24 17:20In Parse_art of eas_mdls.c, there is possible resource exhaustion due to a missing bounds check. This could lead to remote denial of service with no additional execution privileges needed. User interaction is needed for exploitation.Product: AndroidVersions: Android-10Android ID: A-127312550
{
"affected": [],
"aliases": [
"CVE-2020-0172"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2020-06-11T15:15:00Z",
"severity": "MODERATE"
},
"details": "In Parse_art of eas_mdls.c, there is possible resource exhaustion due to a missing bounds check. This could lead to remote denial of service with no additional execution privileges needed. User interaction is needed for exploitation.Product: AndroidVersions: Android-10Android ID: A-127312550",
"id": "GHSA-482r-2g94-j6qr",
"modified": "2022-05-24T17:20:14Z",
"published": "2022-05-24T17:20:14Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2020-0172"
},
{
"type": "WEB",
"url": "https://source.android.com/security/bulletin/pixel/2020-06-01"
}
],
"schema_version": "1.4.0",
"severity": []
}
GHSA-4846-7XWG-PW5M
Vulnerability from github – Published: 2026-07-21 12:33 – Updated: 2026-09-01 21:31A flaw was found in libssh. A remote authenticated peer can advertise a zero maximum packet size in SSH_MSG_CHANNEL_OPEN, causing later channel writes to loop indefinitely and consume CPU, leading to denial of service.
{
"affected": [],
"aliases": [
"CVE-2026-59843"
],
"database_specific": {
"cwe_ids": [
"CWE-400",
"CWE-835"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-07-21T12:18:57Z",
"severity": "MODERATE"
},
"details": "A flaw was found in libssh. A remote authenticated peer can advertise a zero maximum packet size in SSH_MSG_CHANNEL_OPEN, causing later channel writes to loop indefinitely and consume CPU, leading to denial of service.",
"id": "GHSA-4846-7xwg-pw5m",
"modified": "2026-09-01T21:31:13Z",
"published": "2026-07-21T12:33:36Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-59843"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2026:42922"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2026:55855"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2026:62217"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2026:62218"
},
{
"type": "WEB",
"url": "https://access.redhat.com/security/cve/CVE-2026-59843"
},
{
"type": "WEB",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2498176"
}
],
"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-4848-75HF-436M
Vulnerability from github – Published: 2026-09-15 18:32 – Updated: 2026-09-15 18:32This High severity DoS (Denial of Service) vulnerability was introduced in versions 8.9.0, 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 9.2.24
Confluence Data Center 10.2: Upgrade to a release greater than or equal to 10.2.17
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-2026-21588"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-09-15T17:17:12Z",
"severity": "HIGH"
},
"details": "This High severity DoS (Denial of Service) vulnerability was introduced in versions 8.9.0, 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 9.2.24\n\n Confluence Data Center 10.2: Upgrade to a release greater than or equal to 10.2.17\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-4848-75hf-436m",
"modified": "2026-09-15T18:32:32Z",
"published": "2026-09-15T18:32:32Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-21588"
},
{
"type": "WEB",
"url": "https://confluence.atlassian.com/pages/viewpage.action?pageId=1822852209"
},
{
"type": "WEB",
"url": "https://jira.atlassian.com/browse/CONFSERVER-104451"
}
],
"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"
}
]
}
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.