CWE-400
DiscouragedUncontrolled Resource Consumption
Abstraction: Class · Status: Draft
The product does not properly control the allocation and maintenance of a limited resource.
5423 vulnerabilities reference this CWE, most recent first.
GHSA-C9XJ-RF55-C64G
Vulnerability from github – Published: 2023-09-14 21:30 – Updated: 2024-04-26 09:30A flaw was found in GLib. GVariant deserialization is vulnerable to an exponential blowup issue where a crafted GVariant can cause excessive processing, leading to denial of service.
{
"affected": [],
"aliases": [
"CVE-2023-32665"
],
"database_specific": {
"cwe_ids": [
"CWE-400",
"CWE-502"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2023-09-14T20:15:09Z",
"severity": "MODERATE"
},
"details": "A flaw was found in GLib. GVariant deserialization is vulnerable to an exponential blowup issue where a crafted GVariant can cause excessive processing, leading to denial of service.",
"id": "GHSA-c9xj-rf55-c64g",
"modified": "2024-04-26T09:30:33Z",
"published": "2023-09-14T21:30:26Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-32665"
},
{
"type": "WEB",
"url": "https://access.redhat.com/security/cve/CVE-2023-32665"
},
{
"type": "WEB",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2211827"
},
{
"type": "WEB",
"url": "https://gitlab.gnome.org/GNOME/glib/-/issues/2121"
},
{
"type": "WEB",
"url": "https://lists.debian.org/debian-lts-announce/2023/09/msg00030.html"
},
{
"type": "WEB",
"url": "https://security.gentoo.org/glsa/202311-18"
},
{
"type": "WEB",
"url": "https://security.netapp.com/advisory/ntap-20240426-0006"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-CCCF-MJV6-PHWQ
Vulnerability from github – Published: 2023-11-22 12:30 – Updated: 2026-02-23 09:31A possibility of unwanted server memory consumption was detected through the obsolete functionalities in the Rest API methods of the M-Files server
before 23.11.13156.0 which allows attackers to execute DoS attacks.
{
"affected": [],
"aliases": [
"CVE-2023-6117"
],
"database_specific": {
"cwe_ids": [
"CWE-400",
"CWE-770"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2023-11-22T10:15:09Z",
"severity": "MODERATE"
},
"details": "A possibility of unwanted server memory consumption was detected through the obsolete functionalities in the Rest API methods of the\u00a0M-Files server\n\n before 23.11.13156.0 which allows attackers to execute DoS attacks.",
"id": "GHSA-cccf-mjv6-phwq",
"modified": "2026-02-23T09:31:18Z",
"published": "2023-11-22T12:30:26Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-6117"
},
{
"type": "WEB",
"url": "https://empower.m-files.com/security-advisories/CVE-2023-6117"
},
{
"type": "WEB",
"url": "https://product.m-files.com/security-advisories/cve-2023-6117"
},
{
"type": "WEB",
"url": "https://www.m-files.com/about/trust-center/security-advisories/cve-2023-6117"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-CCCJ-XPM5-2HPX
Vulnerability from github – Published: 2026-04-21 21:31 – Updated: 2026-04-21 21:31Vulnerability in the MySQL Server product of Oracle MySQL (component: InnoDB). 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 high 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 4.9 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H).
{
"affected": [],
"aliases": [
"CVE-2026-22004"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-04-21T21:16:25Z",
"severity": "MODERATE"
},
"details": "Vulnerability in the MySQL Server product of Oracle MySQL (component: InnoDB). 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 high 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 4.9 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H).",
"id": "GHSA-cccj-xpm5-2hpx",
"modified": "2026-04-21T21:31:24Z",
"published": "2026-04-21T21:31:24Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-22004"
},
{
"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:H/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-CCF5-W648-6P79
Vulnerability from github – Published: 2022-05-24 19:17 – Updated: 2022-05-24 19:17An Uncontrolled Resource Consumption vulnerability in the kernel of Juniper Networks JUNOS OS allows an unauthenticated network based attacker to cause 100% CPU load and the device to become unresponsive by sending a flood of traffic to the out-of-band management ethernet port. Continued receipted of a flood will create a sustained Denial of Service (DoS) condition. Once the flood subsides the system will recover by itself. An indication that the system is affected by this issue would be that kernel and netisr process are shown to be using a lot of CPU cycles like in the following example output: user@host> show system processes extensive ... PID USERNAME PRI NICE SIZE RES STATE C TIME WCPU COMMAND 16 root -72 - 0K 304K WAIT 1 839:40 88.96% intr{swi1: netisr 0} 0 root 97 - 0K 160K RUN 1 732:43 87.99% kernel{bcm560xgmac0 que} This issue affects Juniper Networks JUNOS OS on EX2300 Series, EX3400 Series, and ACX710: All versions prior to 18.1R3-S13; 18.2 versions prior to 18.2R3-S8; 18.3 versions prior to 18.3R3-S5; 18.4 versions prior to 18.4R2-S8, 18.4R3-S9; 19.1 versions prior to 19.1R3-S5; 19.2 versions prior to 19.2R1-S7, 19.2R3-S3; 19.3 versions prior to 19.3R2-S6, 19.3R3-S2; 19.4 versions prior to 19.4R1-S4, 19.4R3-S3; 20.1 versions prior to 20.1R2-S2, 20.1R3; 20.2 versions prior to 20.2R3; 20.3 versions prior to 20.3R2-S1, 20.3R3; 20.4 versions prior to 20.4R2.
{
"affected": [],
"aliases": [
"CVE-2021-31368"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2021-10-19T19:15:00Z",
"severity": "HIGH"
},
"details": "An Uncontrolled Resource Consumption vulnerability in the kernel of Juniper Networks JUNOS OS allows an unauthenticated network based attacker to cause 100% CPU load and the device to become unresponsive by sending a flood of traffic to the out-of-band management ethernet port. Continued receipted of a flood will create a sustained Denial of Service (DoS) condition. Once the flood subsides the system will recover by itself. An indication that the system is affected by this issue would be that kernel and netisr process are shown to be using a lot of CPU cycles like in the following example output: user@host\u003e show system processes extensive ... PID USERNAME PRI NICE SIZE RES STATE C TIME WCPU COMMAND 16 root -72 - 0K 304K WAIT 1 839:40 88.96% intr{swi1: netisr 0} 0 root 97 - 0K 160K RUN 1 732:43 87.99% kernel{bcm560xgmac0 que} This issue affects Juniper Networks JUNOS OS on EX2300 Series, EX3400 Series, and ACX710: All versions prior to 18.1R3-S13; 18.2 versions prior to 18.2R3-S8; 18.3 versions prior to 18.3R3-S5; 18.4 versions prior to 18.4R2-S8, 18.4R3-S9; 19.1 versions prior to 19.1R3-S5; 19.2 versions prior to 19.2R1-S7, 19.2R3-S3; 19.3 versions prior to 19.3R2-S6, 19.3R3-S2; 19.4 versions prior to 19.4R1-S4, 19.4R3-S3; 20.1 versions prior to 20.1R2-S2, 20.1R3; 20.2 versions prior to 20.2R3; 20.3 versions prior to 20.3R2-S1, 20.3R3; 20.4 versions prior to 20.4R2.",
"id": "GHSA-ccf5-w648-6p79",
"modified": "2022-05-24T19:17:52Z",
"published": "2022-05-24T19:17:52Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2021-31368"
},
{
"type": "WEB",
"url": "https://kb.juniper.net/JSA11230"
}
],
"schema_version": "1.4.0",
"severity": []
}
GHSA-CCRW-5HMV-8M52
Vulnerability from github – Published: 2026-03-06 21:30 – Updated: 2026-03-12 21:34A crafted JavaScript input executed with the QuickJS release 2025-09-13, fixed in commit fcd33c1afa7b3028531f53cd1190a3877454f6b3 (2025-12-11),qjs interpreter using the -m option and a low memory limit can cause an out-of-memory condition followed by an assertion failure in JS_FreeRuntime (list_empty(&rt->gc_obj_list)) during runtime cleanup. Although the engine reports an OOM error, it subsequently aborts with SIGABRT because the GC object list is not fully released. This results in a denial of service.
{
"affected": [],
"aliases": [
"CVE-2025-69654"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-03-06T20:16:11Z",
"severity": "HIGH"
},
"details": "A crafted JavaScript input executed with the QuickJS release 2025-09-13, fixed in commit fcd33c1afa7b3028531f53cd1190a3877454f6b3 (2025-12-11),`qjs` interpreter using the `-m` option and a low memory limit can cause an out-of-memory condition followed by an assertion failure in JS_FreeRuntime (list_empty(\u0026rt-\u003egc_obj_list)) during runtime cleanup. Although the engine reports an OOM error, it subsequently aborts with SIGABRT because the GC object list is not fully released. This results in a denial of service.",
"id": "GHSA-ccrw-5hmv-8m52",
"modified": "2026-03-12T21:34:39Z",
"published": "2026-03-06T21:30:37Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-69654"
},
{
"type": "WEB",
"url": "https://github.com/bellard/quickjs/issues/468"
}
],
"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-CCWP-Q88V-H469
Vulnerability from github – Published: 2022-05-14 02:20 – Updated: 2022-05-14 02:20When GraphicsMagick 1.3.25 processes a MATLAB image in coders/mat.c, it can lead to a denial of service (OOM) in ReadMATImage() if the size specified for a MAT Object is larger than the actual amount of data.
{
"affected": [],
"aliases": [
"CVE-2017-10800"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2017-07-03T01:29:00Z",
"severity": "MODERATE"
},
"details": "When GraphicsMagick 1.3.25 processes a MATLAB image in coders/mat.c, it can lead to a denial of service (OOM) in ReadMATImage() if the size specified for a MAT Object is larger than the actual amount of data.",
"id": "GHSA-ccwp-q88v-h469",
"modified": "2022-05-14T02:20:37Z",
"published": "2022-05-14T02:20:37Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2017-10800"
},
{
"type": "WEB",
"url": "https://www.debian.org/security/2018/dsa-4321"
},
{
"type": "WEB",
"url": "http://hg.code.sf.net/p/graphicsmagick/code/rev/e5761e3a2012"
},
{
"type": "WEB",
"url": "http://www.securityfocus.com/bid/99356"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-CF2X-RQC8-GRFQ
Vulnerability from github – Published: 2021-05-10 19:16 – Updated: 2021-04-19 22:44All versions of package express-validators are vulnerable to Regular Expression Denial of Service (ReDoS) when validating specifically-crafted invalid urls.
{
"affected": [
{
"package": {
"ecosystem": "npm",
"name": "express-validators"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "1.0.4"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2020-7767"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": true,
"github_reviewed_at": "2021-04-19T22:44:18Z",
"nvd_published_at": "2020-11-11T11:15:00Z",
"severity": "MODERATE"
},
"details": "All versions of package express-validators are vulnerable to Regular Expression Denial of Service (ReDoS) when validating specifically-crafted invalid urls.",
"id": "GHSA-cf2x-rqc8-grfq",
"modified": "2021-04-19T22:44:18Z",
"published": "2021-05-10T19:16:27Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2020-7767"
},
{
"type": "WEB",
"url": "https://snyk.io/vuln/SNYK-JS-EXPRESSVALIDATORS-1017404"
}
],
"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": "Regular expression deinal of service in express-validators"
}
GHSA-CFX4-R6F2-M2MC
Vulnerability from github – Published: 2022-05-14 02:58 – Updated: 2024-03-21 03:33** DISPUTED ** The kex_input_kexinit function in kex.c in OpenSSH 6.x and 7.x through 7.3 allows remote attackers to cause a denial of service (memory consumption) by sending many duplicate KEXINIT requests. NOTE: a third party reports that "OpenSSH upstream does not consider this as a security issue."
{
"affected": [],
"aliases": [
"CVE-2016-8858"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2016-12-09T11:59:00Z",
"severity": "HIGH"
},
"details": "** DISPUTED ** The kex_input_kexinit function in kex.c in OpenSSH 6.x and 7.x through 7.3 allows remote attackers to cause a denial of service (memory consumption) by sending many duplicate KEXINIT requests. NOTE: a third party reports that \"OpenSSH upstream does not consider this as a security issue.\"",
"id": "GHSA-cfx4-r6f2-m2mc",
"modified": "2024-03-21T03:33:12Z",
"published": "2022-05-14T02:58:56Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2016-8858"
},
{
"type": "WEB",
"url": "https://github.com/dag-erling/kexkill/issues/1"
},
{
"type": "WEB",
"url": "https://github.com/openssh/openssh-portable/commit/ec165c392ca54317dbe3064a8c200de6531e89ad"
},
{
"type": "WEB",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=1384860"
},
{
"type": "WEB",
"url": "https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf"
},
{
"type": "WEB",
"url": "https://ftp.openbsd.org/pub/OpenBSD/patches/6.0/common/013_ssh_kexinit.patch.sig"
},
{
"type": "WEB",
"url": "https://security.FreeBSD.org/advisories/FreeBSD-SA-16:33.openssh.asc"
},
{
"type": "WEB",
"url": "https://security.gentoo.org/glsa/201612-18"
},
{
"type": "WEB",
"url": "https://security.netapp.com/advisory/ntap-20180201-0001"
},
{
"type": "WEB",
"url": "http://cvsweb.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/kex.c.diff?r1=1.126\u0026r2=1.127\u0026f=h"
},
{
"type": "WEB",
"url": "http://cvsweb.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/kex.c?rev=1.127\u0026content-type=text/x-cvsweb-markup"
},
{
"type": "WEB",
"url": "http://www.openwall.com/lists/oss-security/2016/10/19/3"
},
{
"type": "WEB",
"url": "http://www.openwall.com/lists/oss-security/2016/10/20/1"
},
{
"type": "WEB",
"url": "http://www.securityfocus.com/bid/93776"
},
{
"type": "WEB",
"url": "http://www.securitytracker.com/id/1037057"
}
],
"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"
}
]
}
GHSA-CFXC-V7FF-27XQ
Vulnerability from github – Published: 2022-05-14 01:44 – Updated: 2022-05-14 01:44In FreeBSD before 11.2-STABLE(r340854) and 11.2-RELEASE-p5, the NFS server lacks a bounds check in the READDIRPLUS NFS request. Unprivileged remote users with access to the NFS server can cause a resource exhaustion by forcing the server to allocate an arbitrarily large memory allocation.
{
"affected": [],
"aliases": [
"CVE-2018-17159"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2018-12-04T15:29:00Z",
"severity": "HIGH"
},
"details": "In FreeBSD before 11.2-STABLE(r340854) and 11.2-RELEASE-p5, the NFS server lacks a bounds check in the READDIRPLUS NFS request. Unprivileged remote users with access to the NFS server can cause a resource exhaustion by forcing the server to allocate an arbitrarily large memory allocation.",
"id": "GHSA-cfxc-v7ff-27xq",
"modified": "2022-05-14T01:44:13Z",
"published": "2022-05-14T01:44:13Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2018-17159"
},
{
"type": "WEB",
"url": "https://secuniaresearch.flexerasoftware.com/secunia_research/2018-24"
},
{
"type": "WEB",
"url": "https://security.freebsd.org/advisories/FreeBSD-SA-18:13.nfs.asc"
},
{
"type": "WEB",
"url": "http://www.securityfocus.com/bid/106192"
},
{
"type": "WEB",
"url": "http://www.securitytracker.com/id/1042164"
}
],
"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"
}
]
}
GHSA-CFXP-VW2R-FMFH
Vulnerability from github – Published: 2022-05-14 01:10 – Updated: 2022-05-14 01:10A firewall bypass vulnerability in the proxy ARP service of Juniper Networks Junos OS allows an attacker to cause a high CPU condition leading to a Denial of Service (DoS). This issue affects only IPv4. Affected releases are Juniper Networks Junos OS: 12.1X46 versions above and including 12.1X46-D25 prior to 12.1X46-D71, 12.1X46-D73 on SRX Series; 12.3X48 versions prior to 12.3X48-D50 on SRX Series; 15.1X49 versions prior to 15.1X49-D75 on SRX Series.
{
"affected": [],
"aliases": [
"CVE-2019-0033"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2019-04-10T20:29:00Z",
"severity": "HIGH"
},
"details": "A firewall bypass vulnerability in the proxy ARP service of Juniper Networks Junos OS allows an attacker to cause a high CPU condition leading to a Denial of Service (DoS). This issue affects only IPv4. Affected releases are Juniper Networks Junos OS: 12.1X46 versions above and including 12.1X46-D25 prior to 12.1X46-D71, 12.1X46-D73 on SRX Series; 12.3X48 versions prior to 12.3X48-D50 on SRX Series; 15.1X49 versions prior to 15.1X49-D75 on SRX Series.",
"id": "GHSA-cfxp-vw2r-fmfh",
"modified": "2022-05-14T01:10:42Z",
"published": "2022-05-14T01:10:42Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2019-0033"
},
{
"type": "WEB",
"url": "https://kb.juniper.net/JSA10922"
},
{
"type": "WEB",
"url": "http://www.securityfocus.com/bid/107882"
}
],
"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"
}
]
}
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.