CWE-400
DiscouragedUncontrolled Resource Consumption
Abstraction: Class · Status: Draft
The product does not properly control the allocation and maintenance of a limited resource.
5565 vulnerabilities reference this CWE, most recent first.
GHSA-4F99-4Q7P-P3GH
Vulnerability from github – Published: 2025-12-04 21:31 – Updated: 2026-01-21 16:20A denial-of-service vulnerability exists in github.com/sirupsen/logrus when using Entry.Writer() to log a single-line payload larger than 64KB without newline characters. Due to limitations in the internal bufio.Scanner, the read fails with "token too long" and the writer pipe is closed, leaving Writer() unusable and causing application unavailability (DoS). This affects versions < 1.8.3, 1.9.0, and 1.9.2. The issue is fixed in 1.8.3, 1.9.1, and 1.9.3+, where the input is chunked and the writer continues to function even if an error is logged.
{
"affected": [
{
"package": {
"ecosystem": "Go",
"name": "github.com/sirupsen/logrus"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1.8.3"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "Go",
"name": "github.com/sirupsen/logrus"
},
"ranges": [
{
"events": [
{
"introduced": "1.9.0"
},
{
"fixed": "1.9.1"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.9.0"
]
},
{
"package": {
"ecosystem": "Go",
"name": "github.com/sirupsen/logrus"
},
"ranges": [
{
"events": [
{
"introduced": "1.9.2"
},
{
"fixed": "1.9.3"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.9.2"
]
}
],
"aliases": [
"CVE-2025-65637"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": true,
"github_reviewed_at": "2025-12-05T02:27:47Z",
"nvd_published_at": "2025-12-04T19:16:05Z",
"severity": "HIGH"
},
"details": "A denial-of-service vulnerability exists in github.com/sirupsen/logrus when using Entry.Writer() to log a single-line payload larger than 64KB without newline characters. Due to limitations in the internal bufio.Scanner, the read fails with \"token too long\" and the writer pipe is closed, leaving Writer() unusable and causing application unavailability (DoS). This affects versions \u003c 1.8.3, 1.9.0, and 1.9.2. The issue is fixed in 1.8.3, 1.9.1, and 1.9.3+, where the input is chunked and the writer continues to function even if an error is logged.",
"id": "GHSA-4f99-4q7p-p3gh",
"modified": "2026-01-21T16:20:52Z",
"published": "2025-12-04T21:31:04Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-65637"
},
{
"type": "WEB",
"url": "https://github.com/sirupsen/logrus/issues/1370"
},
{
"type": "WEB",
"url": "https://github.com/sirupsen/logrus/pull/1376"
},
{
"type": "WEB",
"url": "https://github.com/sirupsen/logrus/commit/6acd903758687c4a3db3c11701e6c414fcf1c1f7"
},
{
"type": "WEB",
"url": "https://github.com/mjuanxd/logrus-dos-poc"
},
{
"type": "WEB",
"url": "https://github.com/mjuanxd/logrus-dos-poc/blob/main/README.md"
},
{
"type": "PACKAGE",
"url": "https://github.com/sirupsen/logrus"
},
{
"type": "WEB",
"url": "https://github.com/sirupsen/logrus/releases/tag/v1.8.3"
},
{
"type": "WEB",
"url": "https://github.com/sirupsen/logrus/releases/tag/v1.9.1"
},
{
"type": "WEB",
"url": "https://github.com/sirupsen/logrus/releases/tag/v1.9.3"
},
{
"type": "WEB",
"url": "https://security.snyk.io/vuln/SNYK-GOLANG-GITHUBCOMSIRUPSENLOGRUS-5564391"
}
],
"schema_version": "1.4.0",
"severity": [
{
"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",
"type": "CVSS_V4"
}
],
"summary": "Logrus is vulnerable to DoS when using Entry.Writer()"
}
GHSA-4FR5-6CCQ-75W2
Vulnerability from github – Published: 2024-02-08 00:32 – Updated: 2024-02-08 00:32An issue has been discovered in GitLab EE affecting all versions starting from 11.3 before 16.6.7, all versions starting from 16.7 before 16.7.5, all versions starting from 16.8 before 16.8.2. It was possible for an attacker to cause a client-side denial of service using malicious crafted content in the CODEOWNERS file.
{
"affected": [],
"aliases": [
"CVE-2023-6736"
],
"database_specific": {
"cwe_ids": [
"CWE-1333",
"CWE-400"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-02-07T22:15:09Z",
"severity": "MODERATE"
},
"details": "An issue has been discovered in GitLab EE affecting all versions starting from 11.3 before 16.6.7, all versions starting from 16.7 before 16.7.5, all versions starting from 16.8 before 16.8.2. It was possible for an attacker to cause a client-side denial of service using malicious crafted content in the CODEOWNERS file.",
"id": "GHSA-4fr5-6ccq-75w2",
"modified": "2024-02-08T00:32:19Z",
"published": "2024-02-08T00:32:19Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-6736"
},
{
"type": "WEB",
"url": "https://hackerone.com/reports/2269023"
},
{
"type": "WEB",
"url": "https://gitlab.com/gitlab-org/gitlab/-/issues/435036"
}
],
"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:H",
"type": "CVSS_V3"
}
]
}
GHSA-4FV6-2265-MQXM
Vulnerability from github – Published: 2022-05-13 01:23 – Updated: 2022-05-13 01:23An issue was discovered in GitLab Community and Enterprise Edition before 11.6.10, 11.7.x before 11.7.6, and 11.8.x before 11.8.1. It allows Uncontrolled Resource Consumption.
{
"affected": [],
"aliases": [
"CVE-2019-9220"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2019-04-17T17:29:00Z",
"severity": "HIGH"
},
"details": "An issue was discovered in GitLab Community and Enterprise Edition before 11.6.10, 11.7.x before 11.7.6, and 11.8.x before 11.8.1. It allows Uncontrolled Resource Consumption.",
"id": "GHSA-4fv6-2265-mqxm",
"modified": "2022-05-13T01:23:04Z",
"published": "2022-05-13T01:23:04Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2019-9220"
},
{
"type": "WEB",
"url": "https://about.gitlab.com/2019/03/04/security-release-gitlab-11-dot-8-dot-1-released"
},
{
"type": "WEB",
"url": "https://about.gitlab.com/blog/categories/releases"
},
{
"type": "WEB",
"url": "https://gitlab.com/gitlab-org/gitlab-ce/issues/55653"
}
],
"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-4FX8-WMG3-693V
Vulnerability from github – Published: 2026-07-14 00:31 – Updated: 2026-07-14 15:32A Denial of Service (DoS) vulnerability exists in the receive loop of libmodbus 3.1.12 when running on Windows. The issue stems from improper timeout management during network read operations.
{
"affected": [],
"aliases": [
"CVE-2026-51539"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-07-13T22:16:47Z",
"severity": "HIGH"
},
"details": "A Denial of Service (DoS) vulnerability exists in the receive loop of libmodbus 3.1.12 when running on Windows. The issue stems from improper timeout management during network read operations.",
"id": "GHSA-4fx8-wmg3-693v",
"modified": "2026-07-14T15:32:09Z",
"published": "2026-07-14T00:31:02Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-51539"
},
{
"type": "WEB",
"url": "https://github.com/stephane/libmodbus/issues/843"
},
{
"type": "WEB",
"url": "https://gist.github.com/MrAlaskan/f22dcf01a5dd90da1b191fcee9043a32"
}
],
"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-4FX9-VC88-Q2XC
Vulnerability from github – Published: 2022-03-11 23:39 – Updated: 2022-03-11 23:39JpegImagePlugin may append an EOF marker to the end of a truncated file, so that the last segment of the data will still be processed by the decoder.
If the EOF marker is not detected as such however, this could lead to an infinite loop where JpegImagePlugin keeps trying to end the file.
{
"affected": [
{
"package": {
"ecosystem": "PyPI",
"name": "Pillow"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "9.0.0"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": true,
"github_reviewed_at": "2022-03-11T23:39:27Z",
"nvd_published_at": null,
"severity": "LOW"
},
"details": "JpegImagePlugin may append an EOF marker to the end of a truncated file, so that the last segment of the data will still be processed by the decoder.\n\nIf the EOF marker is not detected as such however, this could lead to an infinite loop where JpegImagePlugin keeps trying to end the file.",
"id": "GHSA-4fx9-vc88-q2xc",
"modified": "2022-03-11T23:39:27Z",
"published": "2022-03-11T23:39:27Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/python-pillow/Pillow/commit/baae9ec4b67c68e3adaf1208cf54e8de5e38a6fd"
},
{
"type": "PACKAGE",
"url": "https://github.com/python-pillow/Pillow"
},
{
"type": "WEB",
"url": "https://pillow.readthedocs.io/en/stable/releasenotes/9.0.0.html#ensure-jpegimageplugin-stops-at-the-end-of-a-truncated-file"
}
],
"schema_version": "1.4.0",
"severity": [],
"summary": "Infinite loop in Pillow"
}
GHSA-4G55-4FXV-2G82
Vulnerability from github – Published: 2022-02-25 00:00 – Updated: 2022-08-10 00:00A vulnerability was found in Radare2 in versions prior to 5.6.2, 5.6.0, 5.5.4 and 5.5.2. Mapping a huge section filled with zeros of an ELF64 binary for MIPS architecture can lead to uncontrolled resource consumption and DoS.
{
"affected": [],
"aliases": [
"CVE-2021-4021"
],
"database_specific": {
"cwe_ids": [
"CWE-400",
"CWE-834"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2022-02-24T19:15:00Z",
"severity": "HIGH"
},
"details": "A vulnerability was found in Radare2 in versions prior to 5.6.2, 5.6.0, 5.5.4 and 5.5.2. Mapping a huge section filled with zeros of an ELF64 binary for MIPS architecture can lead to uncontrolled resource consumption and DoS.",
"id": "GHSA-4g55-4fxv-2g82",
"modified": "2022-08-10T00:00:32Z",
"published": "2022-02-25T00:00:58Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2021-4021"
},
{
"type": "WEB",
"url": "https://github.com/radareorg/radare2/issues/19436"
}
],
"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-4G7Q-7V9W-3X8M
Vulnerability from github – Published: 2024-06-14 06:34 – Updated: 2024-06-14 06:34DoS in KAS in GitLab CE/EE affecting all versions from 16.10.0 prior to 16.10.6 and 16.11.0 prior to 16.11.3 allows an attacker to crash KAS via crafted gRPC requests.
{
"affected": [],
"aliases": [
"CVE-2024-5469"
],
"database_specific": {
"cwe_ids": [
"CWE-400",
"CWE-754"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-06-14T04:15:43Z",
"severity": "LOW"
},
"details": "DoS in KAS in GitLab CE/EE affecting all versions from 16.10.0 prior to 16.10.6 and 16.11.0 prior to 16.11.3 allows an attacker to crash KAS via crafted gRPC requests.",
"id": "GHSA-4g7q-7v9w-3x8m",
"modified": "2024-06-14T06:34:48Z",
"published": "2024-06-14T06:34:47Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-5469"
},
{
"type": "WEB",
"url": "https://gitlab.com/gitlab-org/gitlab/-/issues/464143"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L",
"type": "CVSS_V3"
}
]
}
GHSA-4GG5-VX3J-XWC7
Vulnerability from github – Published: 2022-12-12 15:30 – Updated: 2025-09-02 19:38A parsing issue similar to CVE-2022-3171, but with Message-Type Extensions in protobuf-java core and lite versions prior to 3.21.7, 3.20.3, 3.19.6 and 3.16.3 can lead to a denial of service attack. Inputs containing multiple instances of non-repeated embedded messages with repeated or unknown fields causes objects to be converted back-n-forth between mutable and immutable forms, resulting in potentially long garbage collection pauses. We recommend updating to the versions mentioned above.
{
"affected": [
{
"package": {
"ecosystem": "Maven",
"name": "com.google.protobuf:protobuf-java"
},
"ranges": [
{
"events": [
{
"introduced": "3.0.0"
},
{
"fixed": "3.16.3"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "Maven",
"name": "com.google.protobuf:protobuf-java"
},
"ranges": [
{
"events": [
{
"introduced": "3.17.0"
},
{
"fixed": "3.19.6"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "Maven",
"name": "com.google.protobuf:protobuf-java"
},
"ranges": [
{
"events": [
{
"introduced": "3.20.0"
},
{
"fixed": "3.20.3"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "Maven",
"name": "com.google.protobuf:protobuf-java"
},
"ranges": [
{
"events": [
{
"introduced": "3.21.0"
},
{
"fixed": "3.21.7"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "Maven",
"name": "com.google.protobuf:protobuf-javalite"
},
"ranges": [
{
"events": [
{
"introduced": "3.0.0"
},
{
"fixed": "3.16.3"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "Maven",
"name": "com.google.protobuf:protobuf-javalite"
},
"ranges": [
{
"events": [
{
"introduced": "3.17.0"
},
{
"fixed": "3.19.6"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "Maven",
"name": "com.google.protobuf:protobuf-javalite"
},
"ranges": [
{
"events": [
{
"introduced": "3.20.0"
},
{
"fixed": "3.20.3"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "Maven",
"name": "com.google.protobuf:protobuf-javalite"
},
"ranges": [
{
"events": [
{
"introduced": "3.21.0"
},
{
"fixed": "3.21.7"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2022-3510"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": true,
"github_reviewed_at": "2022-12-12T22:34:26Z",
"nvd_published_at": "2022-12-12T13:15:00Z",
"severity": "HIGH"
},
"details": "A parsing issue similar to CVE-2022-3171, but with Message-Type Extensions in protobuf-java core and lite versions prior to 3.21.7, 3.20.3, 3.19.6 and 3.16.3 can lead to a denial of service attack. Inputs containing multiple instances of non-repeated embedded messages with repeated or unknown fields causes objects to be converted back-n-forth between mutable and immutable forms, resulting in potentially long garbage collection pauses. We recommend updating to the versions mentioned above.",
"id": "GHSA-4gg5-vx3j-xwc7",
"modified": "2025-09-02T19:38:11Z",
"published": "2022-12-12T15:30:33Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2022-3510"
},
{
"type": "WEB",
"url": "https://github.com/protocolbuffers/protobuf/commit/db7c17803320525722f45c1d26fc08bc41d1bf48"
},
{
"type": "PACKAGE",
"url": "https://github.com/protocolbuffers/protobuf/tree/main/java"
}
],
"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": "Protobuf Java vulnerable to Uncontrolled Resource Consumption"
}
GHSA-4GHF-H9PG-HHPP
Vulnerability from github – Published: 2022-05-05 00:29 – Updated: 2024-04-03 23:58A Denial of Service (infinite loop) vulnerability exists in Avira AntiVir Engine before 8.2.12.58 via an unspecified function in the PDF Scanner Engine.
{
"affected": [],
"aliases": [
"CVE-2013-4602"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2020-02-12T22:15:00Z",
"severity": "HIGH"
},
"details": "A Denial of Service (infinite loop) vulnerability exists in Avira AntiVir Engine before 8.2.12.58 via an unspecified function in the PDF Scanner Engine.",
"id": "GHSA-4ghf-h9pg-hhpp",
"modified": "2024-04-03T23:58:07Z",
"published": "2022-05-05T00:29:36Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2013-4602"
},
{
"type": "WEB",
"url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/85099"
},
{
"type": "WEB",
"url": "https://packetstormsecurity.com/files/122024/Avira-AntiVir-Engine-Denial-Of-Service-Filter-Evasion.html"
},
{
"type": "WEB",
"url": "https://vuldb.com/?id.9151"
},
{
"type": "WEB",
"url": "http://www.securityfocus.com/bid/60552"
},
{
"type": "WEB",
"url": "http://www.securitytracker.com/id/1028666"
}
],
"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-4GJ3-6R43-3WFC
Vulnerability from github – Published: 2023-02-10 19:54 – Updated: 2023-02-17 20:32Impact
Trying to read malformed HAMT sharded directories can cause panics and virtual memory leaks. If you are reading untrusted user input, an attacker can then trigger a panic.
This is caused by a bogus fanout parameter in the HAMT directory nodes. This includes checks returned in ipfs/go-bitfield GHSA-2h6c-j3gf-xp9r, as well as limiting the fanout to <= 1024 (to avoid attempts of arbitrary sized allocations).
Patches
- https://github.com/ipfs/go-unixfsnode/commit/91b3d39d33ef0cd2aff2c95d50b2329350944b68
- https://github.com/ipfs/go-unixfsnode/commit/a4ed723727e0bdc2277158337c2fc0d82802d122
References
- https://github.com/ipfs/go-unixfs/security/advisories/GHSA-q264-w97q-q778
- https://github.com/ipfs/go-bitfield/security/advisories/GHSA-2h6c-j3gf-xp9r
{
"affected": [
{
"package": {
"ecosystem": "Go",
"name": "github.com/ipfs/go-unixfsnode"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1.5.2"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2023-23631"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": true,
"github_reviewed_at": "2023-02-10T19:54:14Z",
"nvd_published_at": "2023-02-09T21:15:00Z",
"severity": "HIGH"
},
"details": "## Impact\n\nTrying to read malformed HAMT sharded directories can cause panics and virtual memory leaks.\nIf you are reading untrusted user input, an attacker can then trigger a panic.\n\nThis is caused by a bogus fanout parameter in the HAMT directory nodes.\nThis includes checks returned in [ipfs/go-bitfield GHSA-2h6c-j3gf-xp9r](https://github.com/ipfs/go-bitfield/security/advisories/GHSA-2h6c-j3gf-xp9r), as well as limiting the fanout to \u003c= 1024 (to avoid attempts of arbitrary sized allocations).\n\n## Patches\n- https://github.com/ipfs/go-unixfsnode/commit/91b3d39d33ef0cd2aff2c95d50b2329350944b68\n- https://github.com/ipfs/go-unixfsnode/commit/a4ed723727e0bdc2277158337c2fc0d82802d122\n\n## References\n\n* https://github.com/ipfs/go-unixfs/security/advisories/GHSA-q264-w97q-q778\n* https://github.com/ipfs/go-bitfield/security/advisories/GHSA-2h6c-j3gf-xp9r\n",
"id": "GHSA-4gj3-6r43-3wfc",
"modified": "2023-02-17T20:32:08Z",
"published": "2023-02-10T19:54:14Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/ipfs/go-unixfsnode/security/advisories/GHSA-4gj3-6r43-3wfc"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-23631"
},
{
"type": "WEB",
"url": "https://github.com/ipfs/go-unixfsnode/commit/59050ea8bc458ae55246ae09243e6e165923e076"
},
{
"type": "WEB",
"url": "https://github.com/ipfs/go-unixfsnode/commit/91b3d39d33ef0cd2aff2c95d50b2329350944b68"
},
{
"type": "WEB",
"url": "https://github.com/ipfs/go-unixfsnode/commit/a4ed723727e0bdc2277158337c2fc0d82802d122"
},
{
"type": "PACKAGE",
"url": "https://github.com/ipfs/go-unixfsnode"
},
{
"type": "WEB",
"url": "https://pkg.go.dev/vuln/GO-2023-1559"
}
],
"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": "IPFS go-unixfsnode subject to DOS via HAMT Decoding Panics"
}
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.