CWE-400
DiscouragedUncontrolled Resource Consumption
Abstraction: Class · Status: Draft
The product does not properly control the allocation and maintenance of a limited resource.
5435 vulnerabilities reference this CWE, most recent first.
GHSA-RGGV-CV7R-MW98
Vulnerability from github – Published: 2024-02-26 20:13 – Updated: 2025-02-07 20:44Impact
If an HTTP/2 connection gets TCP congested, when an idle timeout occurs the HTTP/2 session is marked as closed, and then a GOAWAY frame is queued to be written. However it is not written because the connection is TCP congested. When another idle timeout period elapses, it is then supposed to hard close the connection, but it delegates to the HTTP/2 session which reports that it has already been closed so it does not attempt to hard close the connection.
This leaves the connection in ESTABLISHED state (i.e. not closed), TCP congested, and idle.
An attacker can cause many connections to end up in this state, and the server may run out of file descriptors, eventually causing the server to stop accepting new connections from valid clients.
The client may also be impacted (if the server does not read causing a TCP congestion), but the issue is more severe for servers.
Patches
Patched versions: * 9.4.54 * 10.0.20 * 11.0.20 * 12.0.6
Workarounds
Disable HTTP/2 and HTTP/3 support until you can upgrade to a patched version of Jetty. HTTP/1.x is not affected.
References
- https://github.com/jetty/jetty.project/issues/11256.
{
"affected": [
{
"database_specific": {
"last_known_affected_version_range": "\u003c= 9.4.53"
},
"package": {
"ecosystem": "Maven",
"name": "org.eclipse.jetty.http2:http2-common"
},
"ranges": [
{
"events": [
{
"introduced": "9.3.0"
},
{
"fixed": "9.4.54"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"database_specific": {
"last_known_affected_version_range": "\u003c= 10.0.19"
},
"package": {
"ecosystem": "Maven",
"name": "org.eclipse.jetty.http2:http2-common"
},
"ranges": [
{
"events": [
{
"introduced": "10.0.0"
},
{
"fixed": "10.0.20"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"database_specific": {
"last_known_affected_version_range": "\u003c= 10.0.19"
},
"package": {
"ecosystem": "Maven",
"name": "org.eclipse.jetty.http3:http3-common"
},
"ranges": [
{
"events": [
{
"introduced": "10.0.8"
},
{
"fixed": "10.0.20"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"database_specific": {
"last_known_affected_version_range": "\u003c= 11.0.19"
},
"package": {
"ecosystem": "Maven",
"name": "org.eclipse.jetty.http2:http2-common"
},
"ranges": [
{
"events": [
{
"introduced": "11.0.0"
},
{
"fixed": "11.0.20"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"database_specific": {
"last_known_affected_version_range": "\u003c= 11.0.19"
},
"package": {
"ecosystem": "Maven",
"name": "org.eclipse.jetty.http3:http3-common"
},
"ranges": [
{
"events": [
{
"introduced": "11.0.8"
},
{
"fixed": "11.0.20"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"database_specific": {
"last_known_affected_version_range": "\u003c= 12.0.5"
},
"package": {
"ecosystem": "Maven",
"name": "org.eclipse.jetty.http2:jetty-http2-common"
},
"ranges": [
{
"events": [
{
"introduced": "12.0.0"
},
{
"fixed": "12.0.6"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"database_specific": {
"last_known_affected_version_range": "\u003c= 12.0.5"
},
"package": {
"ecosystem": "Maven",
"name": "org.eclipse.jetty.http3:jetty-http3-common"
},
"ranges": [
{
"events": [
{
"introduced": "12.0.0"
},
{
"fixed": "12.0.6"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2024-22201"
],
"database_specific": {
"cwe_ids": [
"CWE-400",
"CWE-770"
],
"github_reviewed": true,
"github_reviewed_at": "2024-02-26T20:13:46Z",
"nvd_published_at": "2024-02-26T16:27:56Z",
"severity": "HIGH"
},
"details": "### Impact\nIf an HTTP/2 connection gets TCP congested, when an idle timeout occurs the HTTP/2 session is marked as closed, and then a GOAWAY frame is queued to be written.\nHowever it is not written because the connection is TCP congested.\nWhen another idle timeout period elapses, it is then supposed to hard close the connection, but it delegates to the HTTP/2 session which reports that it has already been closed so it does not attempt to hard close the connection.\n\nThis leaves the connection in ESTABLISHED state (i.e. not closed), TCP congested, and idle.\n\nAn attacker can cause many connections to end up in this state, and the server may run out of file descriptors, eventually causing the server to stop accepting new connections from valid clients.\n\nThe client may also be impacted (if the server does not read causing a TCP congestion), but the issue is more severe for servers.\n\n### Patches\nPatched versions:\n* 9.4.54\n* 10.0.20\n* 11.0.20\n* 12.0.6\n\n### Workarounds\nDisable HTTP/2 and HTTP/3 support until you can upgrade to a patched version of Jetty.\nHTTP/1.x is not affected.\n\n### References\n* https://github.com/jetty/jetty.project/issues/11256.",
"id": "GHSA-rggv-cv7r-mw98",
"modified": "2025-02-07T20:44:34Z",
"published": "2024-02-26T20:13:46Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/jetty/jetty.project/security/advisories/GHSA-rggv-cv7r-mw98"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-22201"
},
{
"type": "WEB",
"url": "https://github.com/jetty/jetty.project/issues/11256"
},
{
"type": "WEB",
"url": "https://github.com/jetty/jetty.project/issues/11259"
},
{
"type": "WEB",
"url": "https://github.com/jetty/jetty.project/commit/0839a208cdc3fcfe25206a77af59ba9fda260188"
},
{
"type": "WEB",
"url": "https://github.com/jetty/jetty.project/commit/b953871c9a5ff4fbca4a2499848f75182dbd9810"
},
{
"type": "PACKAGE",
"url": "https://github.com/jetty/jetty.project"
},
{
"type": "WEB",
"url": "https://lists.debian.org/debian-lts-announce/2024/04/msg00002.html"
},
{
"type": "WEB",
"url": "https://security.netapp.com/advisory/ntap-20240329-0001"
},
{
"type": "WEB",
"url": "http://www.openwall.com/lists/oss-security/2024/03/20/2"
}
],
"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": "Connection leaking on idle timeout when TCP congested"
}
GHSA-RGMG-8W65-PM2J
Vulnerability from github – Published: 2022-05-24 17:32 – Updated: 2022-05-24 17:32A resource exhaustion issue was addressed with improved input validation. This issue is fixed in iOS 13.1 and iPadOS 13.1, macOS Catalina 10.15. Parsing a maliciously crafted iBooks file may lead to a persistent denial-of-service.
{
"affected": [],
"aliases": [
"CVE-2019-8774"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2020-10-27T20:15:00Z",
"severity": "MODERATE"
},
"details": "A resource exhaustion issue was addressed with improved input validation. This issue is fixed in iOS 13.1 and iPadOS 13.1, macOS Catalina 10.15. Parsing a maliciously crafted iBooks file may lead to a persistent denial-of-service.",
"id": "GHSA-rgmg-8w65-pm2j",
"modified": "2022-05-24T17:32:24Z",
"published": "2022-05-24T17:32:24Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2019-8774"
},
{
"type": "WEB",
"url": "https://support.apple.com/en-us/HT210603"
},
{
"type": "WEB",
"url": "https://support.apple.com/en-us/HT210634"
}
],
"schema_version": "1.4.0",
"severity": []
}
GHSA-RGMX-P2XG-FVR8
Vulnerability from github – Published: 2025-07-15 21:31 – Updated: 2025-07-15 21:31Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Security: Encryption). Supported versions that are affected are 8.0.0-8.0.42, 8.4.0-8.4.5 and 9.0.0-9.3.0. 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-2025-50097"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-07-15T20:15:45Z",
"severity": "MODERATE"
},
"details": "Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Security: Encryption). Supported versions that are affected are 8.0.0-8.0.42, 8.4.0-8.4.5 and 9.0.0-9.3.0. 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-rgmx-p2xg-fvr8",
"modified": "2025-07-15T21:31:42Z",
"published": "2025-07-15T21:31:42Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-50097"
},
{
"type": "WEB",
"url": "https://www.oracle.com/security-alerts/cpujul2025.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-RGRG-QWPP-28J8
Vulnerability from github – Published: 2025-05-13 18:30 – Updated: 2025-05-13 18:30Uncontrolled resource consumption in Windows Deployment Services allows an unauthorized attacker to deny service locally.
{
"affected": [],
"aliases": [
"CVE-2025-29957"
],
"database_specific": {
"cwe_ids": [
"CWE-400",
"CWE-770"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-05-13T17:15:55Z",
"severity": "MODERATE"
},
"details": "Uncontrolled resource consumption in Windows Deployment Services allows an unauthorized attacker to deny service locally.",
"id": "GHSA-rgrg-qwpp-28j8",
"modified": "2025-05-13T18:30:54Z",
"published": "2025-05-13T18:30:54Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-29957"
},
{
"type": "WEB",
"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-29957"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-RGV9-Q543-RQG4
Vulnerability from github – Published: 2022-10-03 00:00 – Updated: 2026-05-21 00:22In FasterXML jackson-databind before 2.12.7.1 and in 2.13.x before 2.13.4, resource exhaustion can occur because of a lack of a check in BeanDeserializer._deserializeFromArray to prevent use of deeply nested arrays. This issue can only happen when the UNWRAP_SINGLE_VALUE_ARRAYS feature is explicitly enabled.
{
"affected": [
{
"package": {
"ecosystem": "Maven",
"name": "com.fasterxml.jackson.core:jackson-databind"
},
"ranges": [
{
"events": [
{
"introduced": "2.4.0-rc1"
},
{
"fixed": "2.12.7.1"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "Maven",
"name": "com.fasterxml.jackson.core:jackson-databind"
},
"ranges": [
{
"events": [
{
"introduced": "2.13.0"
},
{
"fixed": "2.13.4"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2022-42004"
],
"database_specific": {
"cwe_ids": [
"CWE-400",
"CWE-502"
],
"github_reviewed": true,
"github_reviewed_at": "2022-10-04T21:56:21Z",
"nvd_published_at": "2022-10-02T05:15:00Z",
"severity": "HIGH"
},
"details": "In FasterXML jackson-databind before 2.12.7.1 and in 2.13.x before 2.13.4, resource exhaustion can occur because of a lack of a check in BeanDeserializer._deserializeFromArray to prevent use of deeply nested arrays. This issue can only happen when the `UNWRAP_SINGLE_VALUE_ARRAYS` feature is explicitly enabled.",
"id": "GHSA-rgv9-q543-rqg4",
"modified": "2026-05-21T00:22:42Z",
"published": "2022-10-03T00:00:31Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2022-42004"
},
{
"type": "WEB",
"url": "https://github.com/FasterXML/jackson-databind/issues/3582"
},
{
"type": "WEB",
"url": "https://github.com/FasterXML/jackson-databind/commit/063183589218fec19a9293ed2f17ec53ea80ba88"
},
{
"type": "WEB",
"url": "https://github.com/FasterXML/jackson-databind/commit/0e37a39502439ecbaa1a5b5188387c01bf7f7fa1"
},
{
"type": "WEB",
"url": "https://github.com/FasterXML/jackson-databind/commit/35de19e7144c4df8ab178b800ba86e80c3d84252"
},
{
"type": "WEB",
"url": "https://github.com/FasterXML/jackson-databind/commit/cd090979b7ea78c75e4de8a4aed04f7e9fa8deea"
},
{
"type": "WEB",
"url": "https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=50490"
},
{
"type": "PACKAGE",
"url": "https://github.com/FasterXML/jackson-databind"
},
{
"type": "WEB",
"url": "https://lists.debian.org/debian-lts-announce/2022/11/msg00035.html"
},
{
"type": "WEB",
"url": "https://security.gentoo.org/glsa/202210-21"
},
{
"type": "WEB",
"url": "https://security.netapp.com/advisory/ntap-20221118-0008"
},
{
"type": "WEB",
"url": "https://www.debian.org/security/2022/dsa-5283"
}
],
"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:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
"type": "CVSS_V4"
}
],
"summary": "Uncontrolled Resource Consumption in FasterXML jackson-databind"
}
GHSA-RGWG-779V-CFX3
Vulnerability from github – Published: 2026-04-30 15:30 – Updated: 2026-04-30 18:30Dbit N300 T1 Pro Easy Setup Wireless Wi-Fi Router V1.0.0 is vulnerable to Denial of Service via the boa web server URI handler. By initiating a high-volume flood of HTTP GET requests to non-existent URIs, an attacker can exhaust critical system resources, including file descriptors and memory buffers. This results in a kernel deadlock or system hang that disables the web management portal and all routing capabilities.
{
"affected": [],
"aliases": [
"CVE-2026-36957"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-04-30T15:16:22Z",
"severity": "HIGH"
},
"details": "Dbit N300 T1 Pro Easy Setup Wireless Wi-Fi Router V1.0.0 is vulnerable to Denial of Service via the boa web server URI handler. By initiating a high-volume flood of HTTP GET requests to non-existent URIs, an attacker can exhaust critical system resources, including file descriptors and memory buffers. This results in a kernel deadlock or system hang that disables the web management portal and all routing capabilities.",
"id": "GHSA-rgwg-779v-cfx3",
"modified": "2026-04-30T18:30:30Z",
"published": "2026-04-30T15:30:39Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-36957"
},
{
"type": "WEB",
"url": "https://github.com/kirubel-cve/CVE-2026-36957"
},
{
"type": "WEB",
"url": "http://dbit.com"
}
],
"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-RH2H-JQXG-H9F7
Vulnerability from github – Published: 2023-04-20 15:30 – Updated: 2024-04-04 03:36An issue found in Ego Studio SuperClean v.1.1.9 and v.1.1.5 allows an attacker to gain privileges cause a denial of service via the update_info field of the default.xml file.
{
"affected": [],
"aliases": [
"CVE-2023-27652"
],
"database_specific": {
"cwe_ids": [
"CWE-400",
"CWE-611"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2023-04-20T14:15:08Z",
"severity": "MODERATE"
},
"details": "An issue found in Ego Studio SuperClean v.1.1.9 and v.1.1.5 allows an attacker to gain privileges cause a denial of service via the update_info field of the _default_.xml file.",
"id": "GHSA-rh2h-jqxg-h9f7",
"modified": "2024-04-04T03:36:57Z",
"published": "2023-04-20T15:30:27Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-27652"
},
{
"type": "WEB",
"url": "https://apkpure.com/cn/super-clean-phone-cleaner/com.egostudio.clean/download"
},
{
"type": "WEB",
"url": "https://github.com/LianKee/SODA/blob/main/CVEs/CVE-2023-27652/CVE%20detail.md"
},
{
"type": "WEB",
"url": "http://www.egostudiogroup.com"
}
],
"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-RH7W-47GG-JP4C
Vulnerability from github – Published: 2023-06-09 21:30 – Updated: 2024-04-04 04:42An issue found in CrossX v.1.15.3 for Android allows a local attacker to cause a persistent denial of service via the database files.
{
"affected": [],
"aliases": [
"CVE-2023-29767"
],
"database_specific": {
"cwe_ids": [
"CWE-400",
"CWE-770"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2023-06-09T20:15:10Z",
"severity": "MODERATE"
},
"details": "An issue found in CrossX v.1.15.3 for Android allows a local attacker to cause a persistent denial of service via the database files.",
"id": "GHSA-rh7w-47gg-jp4c",
"modified": "2024-04-04T04:42:53Z",
"published": "2023-06-09T21:30:27Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-29767"
},
{
"type": "WEB",
"url": "https://github.com/LianKee/SO-CVEs/blob/main/CVEs/CVE-2023-29767/CVE%20detailed.md"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-RH7X-PPXX-P34C
Vulnerability from github – Published: 2021-08-25 20:49 – Updated: 2021-08-19 20:53An issue was discovered in the ws crate through 2020-09-25 for Rust. The outgoing buffer is not properly limited, leading to a remote memory-consumption attack.
{
"affected": [
{
"package": {
"ecosystem": "crates.io",
"name": "ws"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "0.9.1"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2020-35896"
],
"database_specific": {
"cwe_ids": [
"CWE-400",
"CWE-770"
],
"github_reviewed": true,
"github_reviewed_at": "2021-08-19T20:53:37Z",
"nvd_published_at": "2020-12-31T10:15:00Z",
"severity": "HIGH"
},
"details": "An issue was discovered in the ws crate through 2020-09-25 for Rust. The outgoing buffer is not properly limited, leading to a remote memory-consumption attack.",
"id": "GHSA-rh7x-ppxx-p34c",
"modified": "2021-08-19T20:53:37Z",
"published": "2021-08-25T20:49:32Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2020-35896"
},
{
"type": "WEB",
"url": "https://github.com/housleyjk/ws-rs/issues/291"
},
{
"type": "PACKAGE",
"url": "https://github.com/housleyjk/ws-rs"
},
{
"type": "WEB",
"url": "https://rustsec.org/advisories/RUSTSEC-2020-0043.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"
}
],
"summary": "Insufficient size checks in ws"
}
GHSA-RH83-2FX8-8X6X
Vulnerability from github – Published: 2024-01-09 18:30 – Updated: 2025-03-28 15:31.NET Core and Visual Studio Denial of Service Vulnerability
{
"affected": [],
"aliases": [
"CVE-2024-20672"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-01-09T18:15:50Z",
"severity": "HIGH"
},
"details": ".NET Core and Visual Studio Denial of Service Vulnerability",
"id": "GHSA-rh83-2fx8-8x6x",
"modified": "2025-03-28T15:31:44Z",
"published": "2024-01-09T18:30:28Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-20672"
},
{
"type": "WEB",
"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-20672"
},
{
"type": "WEB",
"url": "https://security.netapp.com/advisory/ntap-20250328-0006"
}
],
"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.