CWE-400
DiscouragedUncontrolled Resource Consumption
Abstraction: Class · Status: Draft
The product does not properly control the allocation and maintenance of a limited resource.
5433 vulnerabilities reference this CWE, most recent first.
GHSA-PH84-RCJ2-FXXM
Vulnerability from github – Published: 2024-12-06 18:30 – Updated: 2025-04-05 00:30Starting in Python 3.12.0, the asyncio._SelectorSocketTransport.writelines() method would not "pause" writing and signal to the Protocol to drain the buffer to the wire once the write buffer reached the "high-water mark". Because of this, Protocols would not periodically drain the write buffer potentially leading to memory exhaustion.
This vulnerability likely impacts a small number of users, you must be using Python 3.12.0 or later, on macOS or Linux, using the asyncio module with protocols, and using .writelines() method which had new zero-copy-on-write behavior in Python 3.12.0 and later. If not all of these factors are true then your usage of Python is unaffected.
{
"affected": [],
"aliases": [
"CVE-2024-12254"
],
"database_specific": {
"cwe_ids": [
"CWE-400",
"CWE-770"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-12-06T16:15:20Z",
"severity": "HIGH"
},
"details": "Starting in Python 3.12.0, the asyncio._SelectorSocketTransport.writelines()\n method would not \"pause\" writing and signal to the Protocol to drain \nthe buffer to the wire once the write buffer reached the \"high-water \nmark\". Because of this, Protocols would not periodically drain the write\n buffer potentially leading to memory exhaustion.\n\n\n\n\n\nThis\n vulnerability likely impacts a small number of users, you must be using\n Python 3.12.0 or later, on macOS or Linux, using the asyncio module \nwith protocols, and using .writelines() method which had new \nzero-copy-on-write behavior in Python 3.12.0 and later. If not all of \nthese factors are true then your usage of Python is unaffected.",
"id": "GHSA-ph84-rcj2-fxxm",
"modified": "2025-04-05T00:30:26Z",
"published": "2024-12-06T18:30:45Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-12254"
},
{
"type": "WEB",
"url": "https://github.com/python/cpython/issues/127655"
},
{
"type": "WEB",
"url": "https://github.com/python/cpython/pull/127656"
},
{
"type": "WEB",
"url": "https://github.com/python/cpython/commit/71e8429ac8e2adc10084ab5ec29a62f4b6671a82"
},
{
"type": "WEB",
"url": "https://github.com/python/cpython/commit/9aa0deb2eef2655a1029ba228527b152353135b5"
},
{
"type": "WEB",
"url": "https://github.com/python/cpython/commit/e991ac8f2037d78140e417cc9a9486223eb3e786"
},
{
"type": "WEB",
"url": "https://mail.python.org/archives/list/security-announce@python.org/thread/H4O3UBAOAQQXGT4RE3E4XQYR5XLROORB"
},
{
"type": "WEB",
"url": "https://security.netapp.com/advisory/ntap-20250404-0010"
},
{
"type": "WEB",
"url": "http://www.openwall.com/lists/oss-security/2024/12/06/1"
}
],
"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-PHC2-G348-384G
Vulnerability from github – Published: 2024-10-04 06:30 – Updated: 2024-10-07 18:31CUPS cups-browsed before 2.5b1 will send an HTTP POST request to an arbitrary destination and port in response to a single IPP UDP packet requesting a printer to be added, a different vulnerability than CVE-2024-47176. (The request is meant to probe the new printer but can be used to create DDoS amplification attacks.)
{
"affected": [],
"aliases": [
"CVE-2024-47850"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-10-04T05:15:11Z",
"severity": "HIGH"
},
"details": "CUPS cups-browsed before 2.5b1 will send an HTTP POST request to an arbitrary destination and port in response to a single IPP UDP packet requesting a printer to be added, a different vulnerability than CVE-2024-47176. (The request is meant to probe the new printer but can be used to create DDoS amplification attacks.)",
"id": "GHSA-phc2-g348-384g",
"modified": "2024-10-07T18:31:03Z",
"published": "2024-10-04T06:30:44Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/OpenPrinting/cups-filters/security/advisories/GHSA-rq86-c7g6-r2h8"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-47850"
},
{
"type": "WEB",
"url": "https://github.com/OpenPrinting/cups"
},
{
"type": "WEB",
"url": "https://www.akamai.com/blog/security-research/october-cups-ddos-threat"
}
],
"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-PHF8-XFVH-MFWQ
Vulnerability from github – Published: 2022-05-24 17:45 – Updated: 2022-05-24 17:45A vulnerability in the Cisco IOx Application Framework of Cisco 809 Industrial Integrated Services Routers (Industrial ISRs), Cisco 829 Industrial ISRs, Cisco CGR 1000 Compute Module, and Cisco IC3000 Industrial Compute Gateway could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to insufficient error handling during packet processing. An attacker could exploit this vulnerability by sending a high and sustained rate of crafted TCP traffic to the IOx web server on an affected device. A successful exploit could allow the attacker to cause the IOx web server to stop processing requests, resulting in a DoS condition.
{
"affected": [],
"aliases": [
"CVE-2021-1460"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2021-03-24T20:15:00Z",
"severity": "HIGH"
},
"details": "A vulnerability in the Cisco IOx Application Framework of Cisco 809 Industrial Integrated Services Routers (Industrial ISRs), Cisco 829 Industrial ISRs, Cisco CGR 1000 Compute Module, and Cisco IC3000 Industrial Compute Gateway could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to insufficient error handling during packet processing. An attacker could exploit this vulnerability by sending a high and sustained rate of crafted TCP traffic to the IOx web server on an affected device. A successful exploit could allow the attacker to cause the IOx web server to stop processing requests, resulting in a DoS condition.",
"id": "GHSA-phf8-xfvh-mfwq",
"modified": "2022-05-24T17:45:15Z",
"published": "2022-05-24T17:45:15Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2021-1460"
},
{
"type": "WEB",
"url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iox-dos-4Fgcjh6"
}
],
"schema_version": "1.4.0",
"severity": []
}
GHSA-PHGW-9RJ7-XGP6
Vulnerability from github – Published: 2024-10-15 21:30 – Updated: 2025-03-13 15:32Vulnerability in the MySQL Server product of Oracle MySQL (component: InnoDB). Supported versions that are affected are 8.0.38 and prior, 8.4.1 and prior and 9.0.1 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-2024-21207"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-10-15T20:15:09Z",
"severity": "MODERATE"
},
"details": "Vulnerability in the MySQL Server product of Oracle MySQL (component: InnoDB). Supported versions that are affected are 8.0.38 and prior, 8.4.1 and prior and 9.0.1 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-phgw-9rj7-xgp6",
"modified": "2025-03-13T15:32:40Z",
"published": "2024-10-15T21:30:38Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-21207"
},
{
"type": "WEB",
"url": "https://security.netapp.com/advisory/ntap-20241025-0007"
},
{
"type": "WEB",
"url": "https://www.oracle.com/security-alerts/cpuoct2024.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-PHGX-P86H-27QM
Vulnerability from github – Published: 2022-05-24 17:44 – Updated: 2022-07-13 00:00IBM Spectrum Scale 5.0.0 through 5.0.5.5 and 5.1.0 through 5.1.0.2 could allow a local user with a valid role to the REST API to cause a denial of service due to weak or absense of rate limiting. IBM X-Force ID: 190973.
{
"affected": [],
"aliases": [
"CVE-2020-4890"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2021-03-16T14:15:00Z",
"severity": "MODERATE"
},
"details": "IBM Spectrum Scale 5.0.0 through 5.0.5.5 and 5.1.0 through 5.1.0.2 could allow a local user with a valid role to the REST API to cause a denial of service due to weak or absense of rate limiting. IBM X-Force ID: 190973.",
"id": "GHSA-phgx-p86h-27qm",
"modified": "2022-07-13T00:00:51Z",
"published": "2022-05-24T17:44:37Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2020-4890"
},
{
"type": "WEB",
"url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/190973"
},
{
"type": "WEB",
"url": "https://www.ibm.com/support/pages/node/6430147"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-PHJ7-PW7P-PXQ8
Vulnerability from github – Published: 2023-06-26 09:30 – Updated: 2024-04-04 05:09Uncontrolled resource consumption in Series WAGO 750-3x/-8x products may allow an unauthenticated remote attacker to DoS the MODBUS server with specially crafted packets.
{
"affected": [],
"aliases": [
"CVE-2023-1150"
],
"database_specific": {
"cwe_ids": [
"CWE-400",
"CWE-772"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2023-06-26T07:15:08Z",
"severity": "HIGH"
},
"details": "Uncontrolled resource consumption in Series WAGO 750-3x/-8x products may allow an unauthenticated remote attacker to DoS the MODBUS server with specially crafted packets.",
"id": "GHSA-phj7-pw7p-pxq8",
"modified": "2024-04-04T05:09:36Z",
"published": "2023-06-26T09:30:22Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-1150"
},
{
"type": "WEB",
"url": "https://cert.vde.com/en/advisories/VDE-2023-005"
}
],
"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-PHM4-FJR6-HF5X
Vulnerability from github – Published: 2022-05-14 01:09 – Updated: 2022-05-14 01:09In LibTIFF 4.0.9, there is an uncontrolled resource consumption in the TIFFSetDirectory function of tif_dir.c. Remote attackers could leverage this vulnerability to cause a denial of service via a crafted tif file. This occurs because the declared number of directory entries is not validated against the actual number of directory entries.
{
"affected": [],
"aliases": [
"CVE-2018-5784"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2018-01-19T08:29:00Z",
"severity": "MODERATE"
},
"details": "In LibTIFF 4.0.9, there is an uncontrolled resource consumption in the TIFFSetDirectory function of tif_dir.c. Remote attackers could leverage this vulnerability to cause a denial of service via a crafted tif file. This occurs because the declared number of directory entries is not validated against the actual number of directory entries.",
"id": "GHSA-phm4-fjr6-hf5x",
"modified": "2022-05-14T01:09:09Z",
"published": "2022-05-14T01:09:09Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2018-5784"
},
{
"type": "WEB",
"url": "https://gitlab.com/libtiff/libtiff/commit/473851d211cf8805a161820337ca74cc9615d6ef"
},
{
"type": "WEB",
"url": "https://lists.debian.org/debian-lts-announce/2018/05/msg00022.html"
},
{
"type": "WEB",
"url": "https://lists.debian.org/debian-lts-announce/2018/07/msg00002.html"
},
{
"type": "WEB",
"url": "https://usn.ubuntu.com/3602-1"
},
{
"type": "WEB",
"url": "https://usn.ubuntu.com/3606-1"
},
{
"type": "WEB",
"url": "https://www.debian.org/security/2018/dsa-4349"
},
{
"type": "WEB",
"url": "http://bugzilla.maptools.org/show_bug.cgi?id=2772"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-PHQR-MM9H-9X4V
Vulnerability from github – Published: 2025-03-27 15:31 – Updated: 2025-03-28 18:33An out-of-memory error in the parseABC_NS_SET_INFO function of libming v0.4.8 allows attackers to cause a Denial of Service (DoS) due to allocator exhaustion.
{
"affected": [],
"aliases": [
"CVE-2025-29484"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-03-27T15:15:59Z",
"severity": "HIGH"
},
"details": "An out-of-memory error in the parseABC_NS_SET_INFO function of libming v0.4.8 allows attackers to cause a Denial of Service (DoS) due to allocator exhaustion.",
"id": "GHSA-phqr-mm9h-9x4v",
"modified": "2025-03-28T18:33:11Z",
"published": "2025-03-27T15:31:13Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-29484"
},
{
"type": "WEB",
"url": "https://github.com/libming/libming/issues/330"
}
],
"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-PHVX-9MGW-67R5
Vulnerability from github – Published: 2026-05-29 20:13 – Updated: 2026-05-29 20:13Impact
DNSIncoming._log_exception_debug and the four QuietLogger exception-dedup methods stored an unbounded _seen_logs dict keyed by str(sys.exc_info()[1]). The seven IncomingDecodeError messages raised from _read_name / _decode_labels_at_offset (RFC 6762 §18 name-decoding error paths) all embed self.source — the peer's ephemeral source port, varying per packet — plus byte offset and pointer link, so every attacker-influenced combination produced a fresh dedup key. The stored value was the full sys.exc_info() triple, whose traceback's frame locals retained self.data (the raw inbound packet, up to 8966 bytes per RFC 6762 §17). Each unique malformed packet therefore pinned ~9 KB until process exit.
Any unauthenticated host on the local link (UDP/5353, 224.0.0.251 / ff02::fb) can drive memory growth at line rate; that includes a guest on the same Wi-Fi, a compromised IoT device, or a container on a shared bridge. On memory-constrained deployments (Home Assistant on Raspberry-Pi-class hardware is the canonical victim) sustained traffic trivially OOM-kills the process, and mDNS-dependent features (HomeKit, Chromecast/Matter, AirPlay, printers) degrade or fail.
Patches
Fixed in zeroconf 0.149.6 (PR #1717). Upgrade to >= 0.149.6.
Workarounds
There is no in-process workaround; upgrading is the fix. Otherwise, restrict mDNS (UDP/5353) to trusted Layer-2 segments via AP client isolation, guest-network separation, or host firewall rules.
Resources
- PR #1717, fix
- Issue #1714, public tracking issue
- RFC 6762 §17, RFC 6762 §18, CWE-400
{
"affected": [
{
"package": {
"ecosystem": "PyPI",
"name": "zeroconf"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "0.149.6"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2026-47183"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": true,
"github_reviewed_at": "2026-05-29T20:13:08Z",
"nvd_published_at": null,
"severity": "MODERATE"
},
"details": "### Impact\n`DNSIncoming._log_exception_debug` and the four `QuietLogger` exception-dedup methods stored an unbounded `_seen_logs` dict keyed by `str(sys.exc_info()[1])`. The seven `IncomingDecodeError` messages raised from `_read_name` / `_decode_labels_at_offset` (RFC 6762 \u00a718 name-decoding error paths) all embed `self.source` \u2014 the peer\u0027s ephemeral source port, varying per packet \u2014 plus byte `offset` and pointer `link`, so every attacker-influenced combination produced a fresh dedup key. The stored value was the full `sys.exc_info()` triple, whose traceback\u0027s frame locals retained `self.data` (the raw inbound packet, up to 8966 bytes per RFC 6762 \u00a717). Each unique malformed packet therefore pinned ~9 KB until process exit.\n\nAny unauthenticated host on the local link (UDP/5353, `224.0.0.251` / `ff02::fb`) can drive memory growth at line rate; that includes a guest on the same Wi-Fi, a compromised IoT device, or a container on a shared bridge. On memory-constrained deployments (Home Assistant on Raspberry-Pi-class hardware is the canonical victim) sustained traffic trivially OOM-kills the process, and mDNS-dependent features (HomeKit, Chromecast/Matter, AirPlay, printers) degrade or fail.\n\n### Patches\nFixed in `zeroconf` 0.149.6 ([PR #1717](https://github.com/python-zeroconf/python-zeroconf/pull/1717)). Upgrade to `\u003e= 0.149.6`.\n\n### Workarounds\nThere is no in-process workaround; upgrading is the fix. Otherwise, restrict mDNS (UDP/5353) to trusted Layer-2 segments via AP client isolation, guest-network separation, or host firewall rules.\n\n### Resources\n- [PR #1717](https://github.com/python-zeroconf/python-zeroconf/pull/1717), fix\n- [Issue #1714](https://github.com/python-zeroconf/python-zeroconf/issues/1714), public tracking issue\n- [RFC 6762 \u00a717](https://www.rfc-editor.org/rfc/rfc6762#section-17), [RFC 6762 \u00a718](https://www.rfc-editor.org/rfc/rfc6762#section-18), [CWE-400](https://cwe.mitre.org/data/definitions/400.html)",
"id": "GHSA-phvx-9mgw-67r5",
"modified": "2026-05-29T20:13:08Z",
"published": "2026-05-29T20:13:08Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/python-zeroconf/python-zeroconf/security/advisories/GHSA-phvx-9mgw-67r5"
},
{
"type": "WEB",
"url": "https://github.com/python-zeroconf/python-zeroconf/issues/1714"
},
{
"type": "WEB",
"url": "https://github.com/python-zeroconf/python-zeroconf/pull/1717"
},
{
"type": "PACKAGE",
"url": "https://github.com/python-zeroconf/python-zeroconf"
}
],
"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"
}
],
"summary": "zeroconf: Unbounded exception-dedup state retains packet buffers via traceback frame locals, enabling LAN-local memory exhaustion"
}
GHSA-PJ2J-V5VQ-RQ7X
Vulnerability from github – Published: 2026-07-01 00:34 – Updated: 2026-07-01 18:31An issue in UTT nv518G nv518GV3v3.2.7-210919-161313 allows a remote attacker to cause a denial of service via the gohead/sub_44af70 component
{
"affected": [],
"aliases": [
"CVE-2026-52197"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-06-30T23:17:27Z",
"severity": "HIGH"
},
"details": "An issue in UTT nv518G nv518GV3v3.2.7-210919-161313 allows a remote attacker to cause a denial of service via the gohead/sub_44af70 component",
"id": "GHSA-pj2j-v5vq-rq7x",
"modified": "2026-07-01T18:31:41Z",
"published": "2026-07-01T00:34:12Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-52197"
},
{
"type": "WEB",
"url": "https://github.com/akuma-QAQ/CVEreport/blob/main/518G/FUN_0044af70/README.md"
},
{
"type": "WEB",
"url": "https://utt.com.cn/downloadcenter.php?filetypeid=3\u0026model=518G\u0026lang=zhcn"
}
],
"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.