CWE-400
DiscouragedUncontrolled Resource Consumption
Abstraction: Class · Status: Draft
The product does not properly control the allocation and maintenance of a limited resource.
5428 vulnerabilities reference this CWE, most recent first.
GHSA-VQMM-3555-WQ2Q
Vulnerability from github – Published: 2026-01-13 12:31 – Updated: 2026-01-13 12:31A vulnerability has been identified in SIMATIC ET 200AL IM 157-1 PN (6ES7157-1AB00-0AB0) (All versions), SIMATIC ET 200MP IM 155-5 PN HF (6ES7155-5AA00-0AC0) (All versions >= V4.2.0), SIMATIC ET 200SP IM 155-6 MF HF (6ES7155-6MU00-0CN0) (All versions), SIMATIC ET 200SP IM 155-6 PN HA (incl. SIPLUS variants) (All versions < V1.3), SIMATIC ET 200SP IM 155-6 PN R1 (6ES7155-6AU00-0HM0) (All versions < V6.0.1), SIMATIC ET 200SP IM 155-6 PN/2 HF (6ES7155-6AU01-0CN0) (All versions >= V4.2.0), SIMATIC ET 200SP IM 155-6 PN/3 HF (6ES7155-6AU30-0CN0) (All versions < V4.2.2), SIMATIC PN/MF Coupler (6ES7158-3MU10-0XA0) (All versions), SIMATIC PN/PN Coupler (6ES7158-3AD10-0XA0) (All versions < V6.0.0), SIPLUS ET 200MP IM 155-5 PN HF (6AG1155-5AA00-2AC0) (All versions >= V4.2.0), SIPLUS ET 200MP IM 155-5 PN HF (6AG1155-5AA00-7AC0) (All versions >= V4.2.0), SIPLUS ET 200MP IM 155-5 PN HF T1 RAIL (6AG2155-5AA00-1AC0) (All versions >= V4.2.0), SIPLUS ET 200SP IM 155-6 PN HF (6AG1155-6AU01-2CN0) (All versions >= V4.2.0), SIPLUS ET 200SP IM 155-6 PN HF (6AG1155-6AU01-7CN0) (All versions >= V4.2.0), SIPLUS ET 200SP IM 155-6 PN HF T1 RAIL (6AG2155-6AU01-1CN0) (All versions >= V4.2.0), SIPLUS ET 200SP IM 155-6 PN HF TX RAIL (6AG2155-6AU01-4CN0) (All versions >= V4.2.0), SIPLUS NET PN/PN Coupler (6AG2158-3AD10-4XA0) (All versions < V6.0.0). Affected devices do not properly handle S7 protocol session disconnect requests. When receiving a valid S7 protocol Disconnect Request (COTP DR TPDU) on TCP port 102, the devices enter an improper session state.
This could allow an attacker to cause the device to become unresponsive, leading to a denial-of-service condition that requires a power cycle to restore normal operation.
{
"affected": [],
"aliases": [
"CVE-2025-40944"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-01-13T10:15:58Z",
"severity": "HIGH"
},
"details": "A vulnerability has been identified in SIMATIC ET 200AL IM 157-1 PN (6ES7157-1AB00-0AB0) (All versions), SIMATIC ET 200MP IM 155-5 PN HF (6ES7155-5AA00-0AC0) (All versions \u003e= V4.2.0), SIMATIC ET 200SP IM 155-6 MF HF (6ES7155-6MU00-0CN0) (All versions), SIMATIC ET 200SP IM 155-6 PN HA (incl. SIPLUS variants) (All versions \u003c V1.3), SIMATIC ET 200SP IM 155-6 PN R1 (6ES7155-6AU00-0HM0) (All versions \u003c V6.0.1), SIMATIC ET 200SP IM 155-6 PN/2 HF (6ES7155-6AU01-0CN0) (All versions \u003e= V4.2.0), SIMATIC ET 200SP IM 155-6 PN/3 HF (6ES7155-6AU30-0CN0) (All versions \u003c V4.2.2), SIMATIC PN/MF Coupler (6ES7158-3MU10-0XA0) (All versions), SIMATIC PN/PN Coupler (6ES7158-3AD10-0XA0) (All versions \u003c V6.0.0), SIPLUS ET 200MP IM 155-5 PN HF (6AG1155-5AA00-2AC0) (All versions \u003e= V4.2.0), SIPLUS ET 200MP IM 155-5 PN HF (6AG1155-5AA00-7AC0) (All versions \u003e= V4.2.0), SIPLUS ET 200MP IM 155-5 PN HF T1 RAIL (6AG2155-5AA00-1AC0) (All versions \u003e= V4.2.0), SIPLUS ET 200SP IM 155-6 PN HF (6AG1155-6AU01-2CN0) (All versions \u003e= V4.2.0), SIPLUS ET 200SP IM 155-6 PN HF (6AG1155-6AU01-7CN0) (All versions \u003e= V4.2.0), SIPLUS ET 200SP IM 155-6 PN HF T1 RAIL (6AG2155-6AU01-1CN0) (All versions \u003e= V4.2.0), SIPLUS ET 200SP IM 155-6 PN HF TX RAIL (6AG2155-6AU01-4CN0) (All versions \u003e= V4.2.0), SIPLUS NET PN/PN Coupler (6AG2158-3AD10-4XA0) (All versions \u003c V6.0.0). Affected devices do not properly handle S7 protocol session disconnect requests. When receiving a valid S7 protocol Disconnect Request (COTP DR TPDU) on TCP port 102, the devices enter an improper session state.\n\nThis could allow an attacker to cause the device to become unresponsive, leading to a denial-of-service condition that requires a power cycle to restore normal operation.",
"id": "GHSA-vqmm-3555-wq2q",
"modified": "2026-01-13T12:31:13Z",
"published": "2026-01-13T12:31:13Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-40944"
},
{
"type": "WEB",
"url": "https://cert-portal.siemens.com/productcert/html/ssa-674753.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"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
"type": "CVSS_V4"
}
]
}
GHSA-VQPH-XHJ8-62WP
Vulnerability from github – Published: 2026-02-10 18:30 – Updated: 2026-02-10 21:31An issue inTcpreplay v4.5.1 allows a local attacker to cause a denial of service via a crafted file to the tcpedit_dlt_getplugin function at src/tcpedit/plugins/dlt_utils.c.
{
"affected": [],
"aliases": [
"CVE-2024-54192"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-02-10T16:16:07Z",
"severity": "MODERATE"
},
"details": "An issue inTcpreplay v4.5.1 allows a local attacker to cause a denial of service via a crafted file to the tcpedit_dlt_getplugin function at src/tcpedit/plugins/dlt_utils.c.",
"id": "GHSA-vqph-xhj8-62wp",
"modified": "2026-02-10T21:31:29Z",
"published": "2026-02-10T18:30:37Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-54192"
},
{
"type": "WEB",
"url": "https://github.com/appneta/tcpreplay/issues/902"
},
{
"type": "WEB",
"url": "https://github.com/appneta/tcpreplay/pull/872"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-VQQQ-3XJQ-CG84
Vulnerability from github – Published: 2022-05-13 01:09 – Updated: 2025-04-11 03:50The mod_proxy_ajp module in the Apache HTTP Server before 2.2.21, when used with mod_proxy_balancer in certain configurations, allows remote attackers to cause a denial of service (temporary "error state" in the backend server) via a malformed HTTP request.
{
"affected": [],
"aliases": [
"CVE-2011-3348"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2011-09-20T05:55:00Z",
"severity": "MODERATE"
},
"details": "The mod_proxy_ajp module in the Apache HTTP Server before 2.2.21, when used with mod_proxy_balancer in certain configurations, allows remote attackers to cause a denial of service (temporary \"error state\" in the backend server) via a malformed HTTP request.",
"id": "GHSA-vqqq-3xjq-cg84",
"modified": "2025-04-11T03:50:33Z",
"published": "2022-05-13T01:09:52Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2011-3348"
},
{
"type": "WEB",
"url": "https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A18154"
},
{
"type": "WEB",
"url": "https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A14941"
},
{
"type": "WEB",
"url": "https://lists.apache.org/thread.html/rfbaf647d52c1cb843e726a0933f156366a806cead84fbd430951591b@%3Ccvs.httpd.apache.org%3E"
},
{
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"url": "https://lists.apache.org/thread.html/rfbaf647d52c1cb843e726a0933f156366a806cead84fbd430951591b%40%3Ccvs.httpd.apache.org%3E"
},
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"url": "https://lists.apache.org/thread.html/rf6449464fd8b7437704c55f88361b66f12d5b5f90bcce66af4be4ba9@%3Ccvs.httpd.apache.org%3E"
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},
{
"type": "WEB",
"url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/69804"
},
{
"type": "WEB",
"url": "http://community.jboss.org/message/625307"
},
{
"type": "WEB",
"url": "http://httpd.apache.org/security/vulnerabilities_22.html#2.2.21"
},
{
"type": "WEB",
"url": "http://lists.apple.com/archives/security-announce/2012/Feb/msg00000.html"
},
{
"type": "WEB",
"url": "http://marc.info/?l=bugtraq\u0026m=131731002122529\u0026w=2"
},
{
"type": "WEB",
"url": "http://marc.info/?l=bugtraq\u0026m=132033751509019\u0026w=2"
},
{
"type": "WEB",
"url": "http://rhn.redhat.com/errata/RHSA-2012-0542.html"
},
{
"type": "WEB",
"url": "http://rhn.redhat.com/errata/RHSA-2012-0543.html"
},
{
"type": "WEB",
"url": "http://secunia.com/advisories/46013"
},
{
"type": "WEB",
"url": "http://support.apple.com/kb/HT5130"
},
{
"type": "WEB",
"url": "http://www.apache.org/dist/httpd/Announcement2.2.html"
},
{
"type": "WEB",
"url": "http://www.mandriva.com/security/advisories?name=MDVSA-2011:168"
},
{
"type": "WEB",
"url": "http://www.oracle.com/technetwork/topics/security/cpujuly2013-1899826.html"
},
{
"type": "WEB",
"url": "http://www.redhat.com/support/errata/RHSA-2011-1391.html"
},
{
"type": "WEB",
"url": "http://www.securityfocus.com/bid/49616"
},
{
"type": "WEB",
"url": "http://www.securitytracker.com/id?1026054"
}
],
"schema_version": "1.4.0",
"severity": []
}
GHSA-VQRF-777Q-WCMM
Vulnerability from github – Published: 2024-05-31 21:30 – Updated: 2025-11-03 21:31An invalid pointer in the modbus_receive() function of libmodbus v3.1.6 allows attackers to cause a Denial of Service (DoS) via a crafted message sent to the unit-test-server.
{
"affected": [],
"aliases": [
"CVE-2024-36845"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-05-31T20:15:10Z",
"severity": "MODERATE"
},
"details": "An invalid pointer in the modbus_receive() function of libmodbus v3.1.6 allows attackers to cause a Denial of Service (DoS) via a crafted message sent to the unit-test-server.",
"id": "GHSA-vqrf-777q-wcmm",
"modified": "2025-11-03T21:31:07Z",
"published": "2024-05-31T21:30:54Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-36845"
},
{
"type": "WEB",
"url": "https://github.com/stephane/libmodbus/issues/750"
},
{
"type": "WEB",
"url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00010.html"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L",
"type": "CVSS_V3"
}
]
}
GHSA-VQVV-2WJ5-Q34W
Vulnerability from github – Published: 2025-06-09 06:30 – Updated: 2025-06-10 19:59A Developer persona can bring down the Authorino service, preventing the evaluation of all AuthPolicies on the cluster
{
"affected": [
{
"package": {
"ecosystem": "Go",
"name": "github.com/kuadrant/authorino"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "0.20.0"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2025-25208"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": true,
"github_reviewed_at": "2025-06-09T13:13:26Z",
"nvd_published_at": "2025-06-09T06:15:24Z",
"severity": "MODERATE"
},
"details": "A Developer persona can bring down the Authorino service, preventing the evaluation of all AuthPolicies on the cluster",
"id": "GHSA-vqvv-2wj5-q34w",
"modified": "2025-06-10T19:59:49Z",
"published": "2025-06-09T06:30:22Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-25208"
},
{
"type": "WEB",
"url": "https://access.redhat.com/security/cve/CVE-2025-25208"
},
{
"type": "WEB",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2347436"
},
{
"type": "PACKAGE",
"url": "https://github.com/Kuadrant/authorino"
}
],
"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"
}
],
"summary": "Authorino Uncontrolled Resource Consumption vulnerability"
}
GHSA-VQWW-4QR9-Q8F7
Vulnerability from github – Published: 2022-05-24 17:19 – Updated: 2022-05-24 17:19An issue was discovered in the Linux kernel before 5.4.7. The prb_calc_retire_blk_tmo() function in net/packet/af_packet.c can result in a denial of service (CPU consumption and soft lockup) in a certain failure case involving TPACKET_V3, aka CID-b43d1f9f7067.
{
"affected": [],
"aliases": [
"CVE-2019-20812"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2020-06-03T03:15:00Z",
"severity": "MODERATE"
},
"details": "An issue was discovered in the Linux kernel before 5.4.7. The prb_calc_retire_blk_tmo() function in net/packet/af_packet.c can result in a denial of service (CPU consumption and soft lockup) in a certain failure case involving TPACKET_V3, aka CID-b43d1f9f7067.",
"id": "GHSA-vqww-4qr9-q8f7",
"modified": "2022-05-24T17:19:02Z",
"published": "2022-05-24T17:19:01Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2019-20812"
},
{
"type": "WEB",
"url": "https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.7"
},
{
"type": "WEB",
"url": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b43d1f9f7067c6759b1051e8ecb84e82cef569fe"
},
{
"type": "WEB",
"url": "https://www.oracle.com/security-alerts/cpuApr2021.html"
},
{
"type": "WEB",
"url": "http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00022.html"
},
{
"type": "WEB",
"url": "http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00008.html"
}
],
"schema_version": "1.4.0",
"severity": []
}
GHSA-VR3P-XMF5-V63X
Vulnerability from github – Published: 2026-06-10 00:31 – Updated: 2026-06-10 00:31CAI Content Credentials versions c2pa-web@0.7.1, c2pa-v0.80.1 and earlier are affected by an Uncontrolled Resource Consumption vulnerability. An attacker could exploit this vulnerability to exhaust system resources, resulting in an application denial-of-service condition. Exploitation of this issue does not require user interaction.
{
"affected": [],
"aliases": [
"CVE-2026-47904"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-06-09T22:16:25Z",
"severity": "MODERATE"
},
"details": "CAI Content Credentials versions c2pa-web@0.7.1, c2pa-v0.80.1 and earlier are affected by an Uncontrolled Resource Consumption vulnerability. An attacker could exploit this vulnerability to exhaust system resources, resulting in an application denial-of-service condition. Exploitation of this issue does not require user interaction.",
"id": "GHSA-vr3p-xmf5-v63x",
"modified": "2026-06-10T00:31:49Z",
"published": "2026-06-10T00:31:49Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-47904"
},
{
"type": "WEB",
"url": "https://helpx.adobe.com/security/products/content-authenticity-sdk/apsb26-61.html"
}
],
"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-VR56-QJ2P-798M
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: Replication). Supported versions that are affected are 8.0.0-8.0.42. 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-2025-53023"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-07-15T20:15:48Z",
"severity": "MODERATE"
},
"details": "Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Replication). Supported versions that are affected are 8.0.0-8.0.42. 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-vr56-qj2p-798m",
"modified": "2025-07-15T21:31:43Z",
"published": "2025-07-15T21:31:43Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-53023"
},
{
"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-VR5Q-96FR-9G77
Vulnerability from github – Published: 2024-08-15 18:31 – Updated: 2024-08-15 21:31Tenda FH1201 v1.2.0.14 (408) was discovered to contain a stack overflow via the mit_pptpusrpw parameter in the fromWizardHandle function. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted POST request.
{
"affected": [],
"aliases": [
"CVE-2024-42951"
],
"database_specific": {
"cwe_ids": [
"CWE-400",
"CWE-787"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-08-15T17:15:19Z",
"severity": "HIGH"
},
"details": "Tenda FH1201 v1.2.0.14 (408) was discovered to contain a stack overflow via the mit_pptpusrpw parameter in the fromWizardHandle function. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted POST request.",
"id": "GHSA-vr5q-96fr-9g77",
"modified": "2024-08-15T21:31:19Z",
"published": "2024-08-15T18:31:51Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-42951"
},
{
"type": "WEB",
"url": "https://github.com/TTTJJJWWW/AHU-IoT-vulnerable/blob/main/Tenda/FH1201/fromWizardHandle_mit_pptpusrpw.md"
}
],
"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-VR65-Q598-5MMM
Vulnerability from github – Published: 2025-02-06 21:32 – Updated: 2025-02-07 18:31An issue in floodlight v1.2 allows a local attacker to cause a denial of service via the Topology Manager module and Linkdiscovery module
{
"affected": [],
"aliases": [
"CVE-2024-57673"
],
"database_specific": {
"cwe_ids": [
"CWE-400",
"CWE-770"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-02-06T20:15:40Z",
"severity": "MODERATE"
},
"details": "An issue in floodlight v1.2 allows a local attacker to cause a denial of service via the Topology Manager module and Linkdiscovery module",
"id": "GHSA-vr65-q598-5mmm",
"modified": "2025-02-07T18:31:20Z",
"published": "2025-02-06T21:32:09Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-57673"
},
{
"type": "WEB",
"url": "https://github.com/floodlight/floodlight/issues/872"
}
],
"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"
}
]
}
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.