CWE-400
DiscouragedUncontrolled Resource Consumption
Abstraction: Class · Status: Draft
The product does not properly control the allocation and maintenance of a limited resource.
6536 vulnerabilities reference this CWE, most recent first.
GHSA-PVRW-G6FX-MCX2
Vulnerability from github – Published: 2023-07-06 19:24 – Updated: 2023-07-06 21:46is.js is a general-purpose check library. Versions 0.9.0 and prior contain one or more regular expressions that are vulnerable to Regular Expression Denial of Service (ReDoS). is.js uses a regex copy-pasted from a gist to validate URLs. Trying to validate a malicious string can cause the regex to loop "forever." This vulnerability was found using a CodeQL query which identifies inefficient regular expressions. is.js has no patch for this issue.
{
"affected": [
{
"package": {
"ecosystem": "npm",
"name": "is_js"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "0.9.0"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2020-26302"
],
"database_specific": {
"cwe_ids": [
"CWE-1333",
"CWE-400"
],
"github_reviewed": true,
"github_reviewed_at": "2023-07-06T21:46:34Z",
"nvd_published_at": "2022-12-22T21:15:00Z",
"severity": "HIGH"
},
"details": "is.js is a general-purpose check library. Versions 0.9.0 and prior contain one or more regular expressions that are vulnerable to Regular Expression Denial of Service (ReDoS). is.js uses a regex copy-pasted from a gist to validate URLs. Trying to validate a malicious string can cause the regex to loop \"forever.\" This vulnerability was found using a CodeQL query which identifies inefficient regular expressions. is.js has no patch for this issue.",
"id": "GHSA-pvrw-g6fx-mcx2",
"modified": "2023-07-06T21:46:34Z",
"published": "2023-07-06T19:24:05Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2020-26302"
},
{
"type": "WEB",
"url": "https://github.com/arasatasaygin/is.js/issues/320"
},
{
"type": "PACKAGE",
"url": "https://github.com/arasatasaygin/is.js"
},
{
"type": "ADVISORY",
"url": "https://securitylab.github.com/advisories/GHSL-2020-295-redos-is.js"
}
],
"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": "is_js vulnerable to Regular Expression Denial of Service"
}
GHSA-PVV2-J27M-Q938
Vulnerability from github – Published: 2026-09-15 21:32 – Updated: 2026-09-15 21:32Vulnerability in the Oracle Hyperion Financial Management product of Oracle Hyperion (component: Security). The supported version that is affected is 11.2.26.0.000. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP to compromise Oracle Hyperion Financial Management. Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of Oracle Hyperion Financial Management. CVSS 3.1 Base Score 7.5 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).
{
"affected": [],
"aliases": [
"CVE-2026-87222"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-09-15T20:19:10Z",
"severity": "HIGH"
},
"details": "Vulnerability in the Oracle Hyperion Financial Management product of Oracle Hyperion (component: Security). The supported version that is affected is 11.2.26.0.000. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP to compromise Oracle Hyperion Financial Management. Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of Oracle Hyperion Financial Management. CVSS 3.1 Base Score 7.5 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).",
"id": "GHSA-pvv2-j27m-q938",
"modified": "2026-09-15T21:32:54Z",
"published": "2026-09-15T21:32:54Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-87222"
},
{
"type": "WEB",
"url": "https://www.oracle.com/security-alerts/cspusep2026.html"
}
],
"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-PVW6-VC2C-X7V5
Vulnerability from github – Published: 2024-01-17 00:30 – Updated: 2025-06-20 21:31Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: DML). Supported versions that are affected are 8.0.34 and prior. 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-2024-20983"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-01-16T22:15:45Z",
"severity": "MODERATE"
},
"details": "Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: DML). Supported versions that are affected are 8.0.34 and prior. 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-pvw6-vc2c-x7v5",
"modified": "2025-06-20T21:31:43Z",
"published": "2024-01-17T00:30:21Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-20983"
},
{
"type": "WEB",
"url": "https://security.netapp.com/advisory/ntap-20240201-0009"
},
{
"type": "WEB",
"url": "https://www.oracle.com/security-alerts/cpujan2024.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-PVX3-GM3C-GMPR
Vulnerability from github – Published: 2022-03-05 00:00 – Updated: 2026-09-02 22:05A design flaw in Go-Ethereum 1.10.12 and older versions allows an attacker node to send 5120 future transactions with a high gas price in one message, which can purge all of pending transactions in a victim node's memory pool, causing a denial of service (DoS).
{
"affected": [
{
"package": {
"ecosystem": "Go",
"name": "github.com/ethereum/go-ethereum"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "1.10.12"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2022-23327"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": true,
"github_reviewed_at": "2022-03-09T19:20:04Z",
"nvd_published_at": "2022-03-04T12:15:00Z",
"severity": "HIGH"
},
"details": "A design flaw in Go-Ethereum 1.10.12 and older versions allows an attacker node to send 5120 future transactions with a high gas price in one message, which can purge all of pending transactions in a victim node\u0027s memory pool, causing a denial of service (DoS).",
"id": "GHSA-pvx3-gm3c-gmpr",
"modified": "2026-09-02T22:05:49Z",
"published": "2022-03-05T00:00:46Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2022-23327"
},
{
"type": "WEB",
"url": "https://dl.acm.org/doi/pdf/10.1145/3460120.3485369"
},
{
"type": "PACKAGE",
"url": "https://github.com/ethereum/go-ethereum"
},
{
"type": "WEB",
"url": "https://nrdax.com/techniques/NRDAX-T0156-mempool-pending-eviction-flood"
},
{
"type": "WEB",
"url": "https://tristartom.github.io/docs/ccs21.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"
}
],
"summary": "Denial of Service in Go-Ethereum"
}
GHSA-PW4V-GR34-2553
Vulnerability from github – Published: 2021-04-16 19:53 – Updated: 2024-09-24 15:42Impact
Missing input validation of some parameters on the endpoints used to confirm third-party identifiers could cause excessive use of disk space and memory leading to resource exhaustion.
Patches
Fixed by 3175fd3.
For more information
If you have any questions or comments about this advisory, email us at security@matrix.org.
{
"affected": [
{
"package": {
"ecosystem": "PyPI",
"name": "matrix-sydent"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2.3.0"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2021-29433"
],
"database_specific": {
"cwe_ids": [
"CWE-20",
"CWE-400"
],
"github_reviewed": true,
"github_reviewed_at": "2021-04-15T18:45:07Z",
"nvd_published_at": "2021-04-15T18:15:00Z",
"severity": "MODERATE"
},
"details": "### Impact\n\nMissing input validation of some parameters on the endpoints used to confirm third-party identifiers could cause excessive use of disk space and memory leading to resource exhaustion.\n\n### Patches\n\nFixed by 3175fd3.\n\n### For more information\n\nIf you have any questions or comments about this advisory, email us at security@matrix.org.",
"id": "GHSA-pw4v-gr34-2553",
"modified": "2024-09-24T15:42:42Z",
"published": "2021-04-16T19:53:37Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/matrix-org/sydent/security/advisories/GHSA-pw4v-gr34-2553"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2021-29433"
},
{
"type": "WEB",
"url": "https://github.com/matrix-org/sydent/commit/3175fd358ebc2c310eab7a3dbf296ce2bd54c1da"
},
{
"type": "PACKAGE",
"url": "https://github.com/matrix-org/sydent"
},
{
"type": "WEB",
"url": "https://github.com/pypa/advisory-database/tree/main/vulns/matrix-sydent/PYSEC-2021-24.yaml"
},
{
"type": "WEB",
"url": "https://pypi.org/project/matrix-sydent"
}
],
"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"
},
{
"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": "Sydent DoS (via resource exhaustion) due to improper input validation"
}
GHSA-PW54-MH39-W3HC
Vulnerability from github – Published: 2021-05-10 19:08 – Updated: 2021-04-20 17:21This affects the package npm-user-validate before 1.0.1. The regex that validates user emails took exponentially longer to process long input strings beginning with @ characters.
{
"affected": [
{
"package": {
"ecosystem": "npm",
"name": "npm-user-validate"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1.0.1"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2020-7754"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": true,
"github_reviewed_at": "2021-04-20T17:21:44Z",
"nvd_published_at": "2020-10-27T15:15:00Z",
"severity": "HIGH"
},
"details": "This affects the package npm-user-validate before 1.0.1. The regex that validates user emails took exponentially longer to process long input strings beginning with @ characters.",
"id": "GHSA-pw54-mh39-w3hc",
"modified": "2021-04-20T17:21:44Z",
"published": "2021-05-10T19:08:15Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/npm/npm-user-validate/security/advisories/GHSA-xgh6-85xh-479p"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2020-7754"
},
{
"type": "WEB",
"url": "https://github.com/npm/npm-user-validate/commit/c8a87dac1a4cc6988b5418f30411a8669bef204e"
},
{
"type": "WEB",
"url": "https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1019353"
},
{
"type": "WEB",
"url": "https://snyk.io/vuln/SNYK-JS-NPMUSERVALIDATE-1019352"
}
],
"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": "Regular expression denial of service in npm-user-validate"
}
GHSA-PW65-258F-V77H
Vulnerability from github – Published: 2024-03-08 03:31 – Updated: 2026-04-02 21:31A memory corruption vulnerability was addressed with improved locking. This issue is fixed in macOS Monterey 12.7.4, macOS Ventura 13.6.5, macOS Sonoma 14.4, visionOS 1.1, iOS 17.4 and iPadOS 17.4, watchOS 10.4, iOS 16.7.6 and iPadOS 16.7.6, tvOS 17.4. An app may be able to cause unexpected system termination or write kernel memory.
{
"affected": [],
"aliases": [
"CVE-2024-23265"
],
"database_specific": {
"cwe_ids": [
"CWE-400",
"CWE-787"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-03-08T02:15:49Z",
"severity": "CRITICAL"
},
"details": "A memory corruption vulnerability was addressed with improved locking. This issue is fixed in macOS Monterey 12.7.4, macOS Ventura 13.6.5, macOS Sonoma 14.4, visionOS 1.1, iOS 17.4 and iPadOS 17.4, watchOS 10.4, iOS 16.7.6 and iPadOS 16.7.6, tvOS 17.4. An app may be able to cause unexpected system termination or write kernel memory.",
"id": "GHSA-pw65-258f-v77h",
"modified": "2026-04-02T21:31:38Z",
"published": "2024-03-08T03:31:25Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-23265"
},
{
"type": "WEB",
"url": "https://support.apple.com/en-us/120880"
},
{
"type": "WEB",
"url": "https://support.apple.com/en-us/120881"
},
{
"type": "WEB",
"url": "https://support.apple.com/en-us/120882"
},
{
"type": "WEB",
"url": "https://support.apple.com/en-us/120883"
},
{
"type": "WEB",
"url": "https://support.apple.com/en-us/120884"
},
{
"type": "WEB",
"url": "https://support.apple.com/en-us/120886"
},
{
"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/HT214083"
},
{
"type": "WEB",
"url": "https://support.apple.com/en-us/HT214084"
},
{
"type": "WEB",
"url": "https://support.apple.com/en-us/HT214085"
},
{
"type": "WEB",
"url": "https://support.apple.com/en-us/HT214086"
},
{
"type": "WEB",
"url": "https://support.apple.com/en-us/HT214087"
},
{
"type": "WEB",
"url": "https://support.apple.com/en-us/HT214088"
},
{
"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/HT214083"
},
{
"type": "WEB",
"url": "https://support.apple.com/kb/HT214084"
},
{
"type": "WEB",
"url": "https://support.apple.com/kb/HT214085"
},
{
"type": "WEB",
"url": "https://support.apple.com/kb/HT214087"
},
{
"type": "WEB",
"url": "https://support.apple.com/kb/HT214088"
},
{
"type": "WEB",
"url": "http://seclists.org/fulldisclosure/2024/Mar/21"
},
{
"type": "WEB",
"url": "http://seclists.org/fulldisclosure/2024/Mar/22"
},
{
"type": "WEB",
"url": "http://seclists.org/fulldisclosure/2024/Mar/23"
},
{
"type": "WEB",
"url": "http://seclists.org/fulldisclosure/2024/Mar/24"
},
{
"type": "WEB",
"url": "http://seclists.org/fulldisclosure/2024/Mar/25"
},
{
"type": "WEB",
"url": "http://seclists.org/fulldisclosure/2024/Mar/26"
}
],
"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-PWHX-M6G7-M6PX
Vulnerability from github – Published: 2022-05-13 01:46 – Updated: 2025-04-20 03:33Livebox 3 Sagemcom SG30_sip-fr-5.15.8.1 devices have an insufficiently large default value for the maximum IPv6 routing table size: it can be filled within minutes. An attacker can exploit this issue to render the affected system unresponsive, resulting in a denial-of-service condition for telephone, Internet, and TV services.
{
"affected": [],
"aliases": [
"CVE-2017-6552"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2017-03-09T09:59:00Z",
"severity": "HIGH"
},
"details": "Livebox 3 Sagemcom SG30_sip-fr-5.15.8.1 devices have an insufficiently large default value for the maximum IPv6 routing table size: it can be filled within minutes. An attacker can exploit this issue to render the affected system unresponsive, resulting in a denial-of-service condition for telephone, Internet, and TV services.",
"id": "GHSA-pwhx-m6g7-m6px",
"modified": "2025-04-20T03:33:56Z",
"published": "2022-05-13T01:46:38Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2017-6552"
},
{
"type": "WEB",
"url": "https://www.exploit-db.com/exploits/41565"
},
{
"type": "WEB",
"url": "https://www.youtube.com/watch?v=ShCs5_8mBlM\u0026t=37s"
},
{
"type": "WEB",
"url": "http://www.securityfocus.com/bid/96827"
}
],
"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-PWQ8-QXP8-42QC
Vulnerability from github – Published: 2026-09-16 06:31 – Updated: 2026-09-17 15:31The Seraphinite Accelerator WordPress plugin before 2.29.24 does not perform a capability check on one of its state-update AJAX actions, allowing authenticated users such as subscribers to write a malformed value that causes an uncaught error on every subsequent admin page load, making the entire admin area inaccessible to all administrators (denial of service).
{
"affected": [],
"aliases": [
"CVE-2026-87828"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-09-16T06:16:35Z",
"severity": "MODERATE"
},
"details": "The Seraphinite Accelerator WordPress plugin before 2.29.24 does not perform a capability check on one of its state-update AJAX actions, allowing authenticated users such as subscribers to write a malformed value that causes an uncaught error on every subsequent admin page load, making the entire admin area inaccessible to all administrators (denial of service).",
"id": "GHSA-pwq8-qxp8-42qc",
"modified": "2026-09-17T15:31:55Z",
"published": "2026-09-16T06:31:36Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-87828"
},
{
"type": "WEB",
"url": "https://wpscan.com/vulnerability/ce546b34-4383-4166-9b87-335a524f37e2"
}
],
"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-PWWG-58J6-8XXJ
Vulnerability from github – Published: 2026-07-22 00:31 – Updated: 2026-07-22 00:31Vulnerability in the MySQL Server, MySQL Cluster product of Oracle MySQL (component: Server: Replication). Supported versions that are affected are MySQL Server: 8.4.0-8.4.10, 9.7.0-9.7.1; MySQL Cluster: 8.0.0-8.0.47, 8.4.0-8.4.10 and 9.7.0-9.7.1. Difficult to exploit vulnerability allows high privileged attacker with network access via multiple protocols to compromise MySQL Server, MySQL Cluster. Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of MySQL Server, MySQL Cluster. CVSS 3.1 Base Score 4.4 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H).
{
"affected": [],
"aliases": [
"CVE-2026-60184"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-07-21T22:17:19Z",
"severity": "MODERATE"
},
"details": "Vulnerability in the MySQL Server, MySQL Cluster product of Oracle MySQL (component: Server: Replication). Supported versions that are affected are MySQL Server: 8.4.0-8.4.10, 9.7.0-9.7.1; MySQL Cluster: 8.0.0-8.0.47, 8.4.0-8.4.10 and 9.7.0-9.7.1. Difficult to exploit vulnerability allows high privileged attacker with network access via multiple protocols to compromise MySQL Server, MySQL Cluster. Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of MySQL Server, MySQL Cluster. CVSS 3.1 Base Score 4.4 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H).",
"id": "GHSA-pwwg-58j6-8xxj",
"modified": "2026-07-22T00:31:22Z",
"published": "2026-07-22T00:31:22Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-60184"
},
{
"type": "WEB",
"url": "https://www.oracle.com/security-alerts/cpujul2026.html"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:H/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.