Common Weakness Enumeration
CWE-400
DiscouragedUncontrolled Resource Consumption
Abstraction: Class · Status: Draft
The product does not properly control the allocation and maintenance of a limited resource.
5419 vulnerabilities reference this CWE, most recent first.
GHSA-FX47-JPV9-7HXR
Vulnerability from github – Published: 2025-03-20 12:32 – Updated: 2025-03-20 18:57
VLAI
Summary
Aim Vulnerable to Denial of Service (DoS)
Details
In version 3.23.0 of aimhubio/aim, the ScheduledStatusReporter object can be instantiated to run on the main thread of the tracking server, leading to the main thread being blocked indefinitely. This results in a denial of service as the tracking server becomes unable to respond to other requests.
Severity
7.5 (High)
{
"affected": [
{
"package": {
"ecosystem": "PyPI",
"name": "aim"
},
"ranges": [
{
"events": [
{
"introduced": "3.15.0"
},
{
"last_affected": "3.23.0"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2024-10110"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": true,
"github_reviewed_at": "2025-03-20T18:57:06Z",
"nvd_published_at": "2025-03-20T10:15:14Z",
"severity": "HIGH"
},
"details": "In version 3.23.0 of aimhubio/aim, the ScheduledStatusReporter object can be instantiated to run on the main thread of the tracking server, leading to the main thread being blocked indefinitely. This results in a denial of service as the tracking server becomes unable to respond to other requests.",
"id": "GHSA-fx47-jpv9-7hxr",
"modified": "2025-03-20T18:57:07Z",
"published": "2025-03-20T12:32:38Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-10110"
},
{
"type": "PACKAGE",
"url": "https://github.com/aimhubio/aim"
},
{
"type": "WEB",
"url": "https://github.com/aimhubio/aim/blob/a566d4a2501c96a545a3c89d92af6ad7e7e0da99/aim/sdk/reporter/__init__.py#L789"
},
{
"type": "WEB",
"url": "https://huntr.com/bounties/5ea6cf56-7b4c-4dce-9b6c-3e910fbb1ae4"
}
],
"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"
}
],
"summary": "Aim Vulnerable to Denial of Service (DoS)"
}
GHSA-FX4F-94F8-R3JM
Vulnerability from github – Published: 2025-07-29 21:30 – Updated: 2025-07-29 21:30
VLAI
Details
NanoMQ v0.17.9 was discovered to contain a heap use-after-free vulnerability via the component sub_Ctx_handle. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted SUBSCRIBE message.
Severity
7.5 (High)
{
"affected": [],
"aliases": [
"CVE-2024-42651"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-07-29T19:15:43Z",
"severity": "HIGH"
},
"details": "NanoMQ v0.17.9 was discovered to contain a heap use-after-free vulnerability via the component sub_Ctx_handle. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted SUBSCRIBE message.",
"id": "GHSA-fx4f-94f8-r3jm",
"modified": "2025-07-29T21:30:43Z",
"published": "2025-07-29T21:30:43Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-42651"
},
{
"type": "WEB",
"url": "https://github.com/nanomq/nanomq/issues/1217"
},
{
"type": "WEB",
"url": "https://github.com/nanomq/nanomq"
},
{
"type": "WEB",
"url": "https://github.com/songxpu/bug_report/blob/master/MQTT/NanoMQ/CVE-2024-42651.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-FX8R-HF6C-5P46
Vulnerability from github – Published: 2022-06-21 00:00 – Updated: 2022-06-29 00:00
VLAI
Details
Denial of Service in GitHub repository inventree/inventree prior to 0.8.0.
Severity
6.5 (Medium)
{
"affected": [],
"aliases": [
"CVE-2022-2134"
],
"database_specific": {
"cwe_ids": [
"CWE-400",
"CWE-770"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2022-06-20T15:15:00Z",
"severity": "MODERATE"
},
"details": "Denial of Service in GitHub repository inventree/inventree prior to 0.8.0.",
"id": "GHSA-fx8r-hf6c-5p46",
"modified": "2022-06-29T00:00:29Z",
"published": "2022-06-21T00:00:46Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2022-2134"
},
{
"type": "WEB",
"url": "https://github.com/inventree/inventree/commit/63b4ff3eb6e80861962fafe79c9b483cd7239d6c"
},
{
"type": "WEB",
"url": "https://huntr.dev/bounties/57b0f272-a97f-4cb3-b546-c863c68a561a"
}
],
"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-FX92-P77R-3R2C
Vulnerability from github – Published: 2022-05-24 19:02 – Updated: 2022-09-21 00:00
VLAI
Details
A flaw was found in libwebp in versions before 1.0.1. When reading a file libwebp allocates an excessive amount of memory. The highest threat from this vulnerability is to the service availability.
Severity
7.5 (High)
{
"affected": [],
"aliases": [
"CVE-2020-36332"
],
"database_specific": {
"cwe_ids": [
"CWE-20",
"CWE-400"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2021-05-21T17:15:00Z",
"severity": "HIGH"
},
"details": "A flaw was found in libwebp in versions before 1.0.1. When reading a file libwebp allocates an excessive amount of memory. The highest threat from this vulnerability is to the service availability.",
"id": "GHSA-fx92-p77r-3r2c",
"modified": "2022-09-21T00:00:37Z",
"published": "2022-05-24T19:02:55Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2020-36332"
},
{
"type": "WEB",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=1956868"
},
{
"type": "WEB",
"url": "https://security.netapp.com/advisory/ntap-20211104-0004"
},
{
"type": "WEB",
"url": "https://www.debian.org/security/2021/dsa-4930"
}
],
"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-FXRC-HG6J-6V3X
Vulnerability from github – Published: 2022-12-13 15:30 – Updated: 2022-12-13 19:24
VLAI
Summary
hutool-json vulnerable to memory exhaustion
Details
hutool-json v5.8.10 was discovered to contain an out of memory error. This issue is similar to CVE-2022-45690.
{
"affected": [
{
"package": {
"ecosystem": "Maven",
"name": "cn.hutool:hutool-json"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "5.8.10"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2022-45689"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": true,
"github_reviewed_at": "2022-12-13T19:24:59Z",
"nvd_published_at": "2022-12-13T15:15:00Z",
"severity": "LOW"
},
"details": "hutool-json v5.8.10 was discovered to contain an out of memory error. This issue is similar to CVE-2022-45690.",
"id": "GHSA-fxrc-hg6j-6v3x",
"modified": "2022-12-13T19:24:59Z",
"published": "2022-12-13T15:30:26Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2022-45689"
},
{
"type": "WEB",
"url": "https://github.com/dromara/hutool/issues/2747"
},
{
"type": "PACKAGE",
"url": "https://github.com/dromara/hutool"
}
],
"schema_version": "1.4.0",
"severity": [],
"summary": "hutool-json vulnerable to memory exhaustion"
}
GHSA-G23V-P5JQ-JVH4
Vulnerability from github – Published: 2022-01-06 18:37 – Updated: 2021-06-24 13:23
VLAI
Summary
Infinite loop in Apache CFX
Details
A vulnerability in the JsonMapObjectReaderWriter of Apache CXF allows an attacker to submit malformed JSON to a web service, which results in the thread getting stuck in an infinite loop, consuming CPU indefinitely. This issue affects Apache CXF versions prior to 3.4.4; Apache CXF versions prior to 3.3.11.
Severity
7.5 (High)
{
"affected": [
{
"package": {
"ecosystem": "Maven",
"name": "org.apache.cxf:apache-cxf"
},
"ranges": [
{
"events": [
{
"introduced": "3.4.0"
},
{
"fixed": "3.4.4"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "Maven",
"name": "org.apache.cxf:apache-cxf"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "3.3.11"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "Maven",
"name": "org.apache.cxf:cxf"
},
"ranges": [
{
"events": [
{
"introduced": "3.4.0"
},
{
"fixed": "3.4.4"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "Maven",
"name": "org.apache.cxf:cxf"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "3.3.11"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2021-30468"
],
"database_specific": {
"cwe_ids": [
"CWE-400",
"CWE-835"
],
"github_reviewed": true,
"github_reviewed_at": "2021-06-17T18:54:46Z",
"nvd_published_at": "2021-06-16T12:15:00Z",
"severity": "HIGH"
},
"details": "A vulnerability in the JsonMapObjectReaderWriter of Apache CXF allows an attacker to submit malformed JSON to a web service, which results in the thread getting stuck in an infinite loop, consuming CPU indefinitely. This issue affects Apache CXF versions prior to 3.4.4; Apache CXF versions prior to 3.3.11.",
"id": "GHSA-g23v-p5jq-jvh4",
"modified": "2021-06-24T13:23:03Z",
"published": "2022-01-06T18:37:14Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2021-30468"
},
{
"type": "WEB",
"url": "https://lists.apache.org/thread.html/r3f46ae38e4a6e80c069cdb320e0ce831b0a21a12ef0cc92c0943f34a@%3Ccommits.tomee.apache.org%3E"
},
{
"type": "WEB",
"url": "https://lists.apache.org/thread.html/r4771084730c4cf6e59eda60b4407122c86f174eb750b24f610ba9ff4@%3Ccommits.tomee.apache.org%3E"
},
{
"type": "WEB",
"url": "https://lists.apache.org/thread.html/r4a4b6bc0520b69c18d2a59daa6af84ae49f0c22164dccb8538794459@%3Cannounce.apache.org%3E"
},
{
"type": "WEB",
"url": "https://lists.apache.org/thread.html/r4a4b6bc0520b69c18d2a59daa6af84ae49f0c22164dccb8538794459@%3Cdev.cxf.apache.org%3E"
},
{
"type": "WEB",
"url": "https://lists.apache.org/thread.html/r4a4b6bc0520b69c18d2a59daa6af84ae49f0c22164dccb8538794459@%3Cusers.cxf.apache.org%3E"
},
{
"type": "WEB",
"url": "https://lists.apache.org/thread.html/r54c0f1cbbb9f381dfbedb9ea5e90ecb1c0a15371f40c4b10322ac737@%3Ccommits.tomee.apache.org%3E"
},
{
"type": "WEB",
"url": "https://lists.apache.org/thread.html/ra833f78b3fa577cb43558cf343859a1bf70b1c5ce2353b3877d96422@%3Ccommits.tomee.apache.org%3E"
},
{
"type": "WEB",
"url": "https://lists.apache.org/thread.html/rac07822057521dccf33ab5d136e0e8c599a6e2c8ac75e44ffbdc6e07@%3Ccommits.tomee.apache.org%3E"
},
{
"type": "WEB",
"url": "https://lists.apache.org/thread.html/re5b2a2b77faa22684d47bd2ac6623135c615565328ff40a1ec705448@%3Ccommits.tomee.apache.org%3E"
},
{
"type": "WEB",
"url": "https://lists.apache.org/thread.html/re9e05c6cab5f0dcc827eba4e6fcf26fa0b493e7ca84d62c867a80d03@%3Ccommits.tomee.apache.org%3E"
},
{
"type": "WEB",
"url": "https://security.netapp.com/advisory/ntap-20210917-0002"
},
{
"type": "WEB",
"url": "https://www.oracle.com/security-alerts/cpuapr2022.html"
},
{
"type": "WEB",
"url": "https://www.oracle.com/security-alerts/cpuoct2021.html"
},
{
"type": "WEB",
"url": "http://cxf.apache.org/security-advisories.data/CVE-2021-30468.txt.asc"
},
{
"type": "WEB",
"url": "http://www.openwall.com/lists/oss-security/2021/06/16/2"
}
],
"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": "Infinite loop in Apache CFX"
}
GHSA-G26W-G327-7XM5
Vulnerability from github – Published: 2024-07-11 00:32 – Updated: 2024-07-11 00:32
VLAI
Details
An Uncontrolled Resource Consumption vulnerability in the
Layer 2 Address Learning Daemon (l2ald)
of Juniper Networks Junos OS Evolved allows an unauthenticated, adjacent attacker to cause a memory leak, eventually exhausting all system memory, leading to a system crash and Denial of Service (DoS).
Certain MAC table updates cause a small amount of memory to leak. Once memory utilization reaches its limit, the issue will result in a system crash and restart.
To identify the issue, execute the CLI command:
user@device> show platform application-info allocations app l2ald-agent EVL Object Allocation Statistics:
Node Application Context Name Live Allocs Fails Guids re0 l2ald-agent net::juniper::rtnh::L2Rtinfo 1069096 1069302 0 1069302 re0 l2ald-agent net::juniper::rtnh::NHOpaqueTlv 114 195 0 195
This issue affects Junos OS Evolved:
-
All versions before 21.4R3-S8-EVO,
-
from 22.2-EVO before 22.2R3-S4-EVO,
- from 22.3-EVO before 22.3R3-S3-EVO,
- from 22.4-EVO before 22.4R3-EVO,
- from 23.2-EVO before 23.2R2-EVO.
Severity
{
"affected": [],
"aliases": [
"CVE-2024-39557"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-07-10T23:15:12Z",
"severity": "HIGH"
},
"details": "An Uncontrolled Resource Consumption vulnerability in the \n\nLayer 2 Address Learning Daemon (l2ald)\n\n of Juniper Networks Junos OS Evolved allows an unauthenticated, adjacent attacker to cause a memory leak, eventually exhausting all system memory, leading to a system crash and Denial of Service (DoS).\n\nCertain MAC table updates cause a small amount of memory to leak.\u00a0 Once memory utilization reaches its limit, the issue will result in a system crash and restart.\n\nTo identify the issue, execute the CLI command:\n \nuser@device\u003e show platform application-info allocations app l2ald-agent\nEVL Object Allocation Statistics:\n \n Node \u00a0 Application \u00a0 \u00a0 Context Name \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 Live \u00a0 Allocs \u00a0 Fails \u00a0 \u00a0 Guids\n re0 \u00a0 l2ald-agent \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 net::juniper::rtnh::L2Rtinfo \u00a0 \u00a0 \u00a0 1069096 1069302 \u00a0 0 \u00a0 \u00a0 \u00a0 \u00a0 1069302\n re0 \u00a0 l2ald-agent \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 net::juniper::rtnh::NHOpaqueTlv \u00a0 \u00a0 114 \u00a0 \u00a0 195 \u00a0 \u00a0 \u00a0 0 \u00a0 \u00a0 \u00a0 \u00a0 195\n\n\n\nThis issue affects Junos OS Evolved: \n\n\n * All versions before 21.4R3-S8-EVO,\n\n * from 22.2-EVO before 22.2R3-S4-EVO, \n * from 22.3-EVO\u00a0before 22.3R3-S3-EVO, \n * from 22.4-EVO before 22.4R3-EVO, \n * from 23.2-EVO before 23.2R2-EVO.",
"id": "GHSA-g26w-g327-7xm5",
"modified": "2024-07-11T00:32:51Z",
"published": "2024-07-11T00:32:51Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-39557"
},
{
"type": "WEB",
"url": "https://supportportal.juniper.net/JSA83017"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/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:A/V:X/RE:X/U:X",
"type": "CVSS_V4"
}
]
}
GHSA-G28G-QQ9M-986C
Vulnerability from github – Published: 2022-05-13 01:34 – Updated: 2022-05-13 01:34
VLAI
Details
In Moxa NPort 5210, 5230, and 5232 versions 2.9 build 17030709 and prior, the amount of resources requested by a malicious actor are not restricted, allowing for a denial-of-service condition.
Severity
7.5 (High)
{
"affected": [],
"aliases": [
"CVE-2018-10632"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2018-07-24T17:29:00Z",
"severity": "HIGH"
},
"details": "In Moxa NPort 5210, 5230, and 5232 versions 2.9 build 17030709 and prior, the amount of resources requested by a malicious actor are not restricted, allowing for a denial-of-service condition.",
"id": "GHSA-g28g-qq9m-986c",
"modified": "2022-05-13T01:34:58Z",
"published": "2022-05-13T01:34:58Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2018-10632"
},
{
"type": "WEB",
"url": "https://ics-cert.us-cert.gov/advisories/ICSA-18-200-04"
},
{
"type": "WEB",
"url": "http://www.securityfocus.com/bid/104863"
}
],
"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-G2CX-FP24-993M
Vulnerability from github – Published: 2022-05-24 17:00 – Updated: 2024-04-04 02:37
VLAI
Details
An exploitable denial-of-service vulnerability exists in the Weave daemon of the Nest Cam IQ Indoor, version 4620002. A set of TCP connections can cause unrestricted resource allocation, resulting in a denial of service. An attacker can connect multiple times to trigger this vulnerability.
Severity
7.5 (High)
{
"affected": [],
"aliases": [
"CVE-2019-5043"
],
"database_specific": {
"cwe_ids": [
"CWE-400",
"CWE-770"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2019-10-31T21:15:00Z",
"severity": "HIGH"
},
"details": "An exploitable denial-of-service vulnerability exists in the Weave daemon of the Nest Cam IQ Indoor, version 4620002. A set of TCP connections can cause unrestricted resource allocation, resulting in a denial of service. An attacker can connect multiple times to trigger this vulnerability.",
"id": "GHSA-g2cx-fp24-993m",
"modified": "2024-04-04T02:37:21Z",
"published": "2022-05-24T17:00:13Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2019-5043"
},
{
"type": "WEB",
"url": "https://talosintelligence.com/vulnerability_reports/TALOS-2019-0810"
}
],
"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-G2FG-MR77-6VRM
Vulnerability from github – Published: 2021-03-12 21:33 – Updated: 2022-02-08 21:37
VLAI
Summary
Uncontrolled Resource Consumption in Apache Thrift
Details
In Apache Thrift 0.9.3 to 0.13.0, malicious RPC clients could send short messages which would result in a large memory allocation, potentially leading to denial of service.
Severity
7.5 (High)
{
"affected": [
{
"package": {
"ecosystem": "Maven",
"name": "org.apache.thrift:libthrift"
},
"ranges": [
{
"events": [
{
"introduced": "0.9.3"
},
{
"fixed": "0.14.0"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2020-13949"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": true,
"github_reviewed_at": "2021-03-12T19:44:27Z",
"nvd_published_at": "2021-02-12T20:15:00Z",
"severity": "HIGH"
},
"details": "In Apache Thrift 0.9.3 to 0.13.0, malicious RPC clients could send short messages which would result in a large memory allocation, potentially leading to denial of service.",
"id": "GHSA-g2fg-mr77-6vrm",
"modified": "2022-02-08T21:37:21Z",
"published": "2021-03-12T21:33:55Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2020-13949"
},
{
"type": "WEB",
"url": "https://github.com/apache/hbase/pull/2958"
},
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"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": "Uncontrolled Resource Consumption in Apache Thrift"
}
Mitigation
Architecture and Design
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
Architecture and Design
- 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
Architecture and Design
Ensure that protocols have specific limits of scale placed on them.
Mitigation
Implementation
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.