CVE-2021-4235

Due to unbounded alias chasing, a maliciously crafted YAML file can cause the system to consume significant system resources. If parsing user input, this may be used as a denial of service vector.

CVSS v3 5.5 MEDIUM

5.5^/10

CVSS v3 : MEDIUM

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/go-yaml/yaml/commit/bb4e33bf68bf89cad44d386192cbed201f35b241	Patch Third Party Advisory
https://github.com/go-yaml/yaml/pull/375	Exploit Patch Third Party Advisory
https://lists.debian.org/debian-lts-announce/2023/07/msg00001.html
https://pkg.go.dev/vuln/GO-2021-0061	Third Party Advisory
https://github.com/go-yaml/yaml/commit/bb4e33bf68bf89cad44d386192cbed201f35b241	Patch Third Party Advisory
https://github.com/go-yaml/yaml/pull/375	Exploit Patch Third Party Advisory
https://lists.debian.org/debian-lts-announce/2023/07/msg00001.html
https://pkg.go.dev/vuln/GO-2021-0061	Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:yaml_project:yaml:*:*:*:*:*:go:*:*

History

21 Nov 2024, 06:37

Type	Values Removed	Values Added
Summary		(es) Debido a la búsqueda ilimitada de alias, un archivo YAML creado con fines malintencionados puede hacer que el sistema consuma importantes recursos. Si se analiza la entrada del usuario, esto se puede utilizar como un vector de denegación de servicio.
References	~~() https://github.com/go-yaml/yaml/commit/bb4e33bf68bf89cad44d386192cbed201f35b241 - Patch, Third Party Advisory~~	() https://github.com/go-yaml/yaml/commit/bb4e33bf68bf89cad44d386192cbed201f35b241 - Patch, Third Party Advisory
References	~~() https://github.com/go-yaml/yaml/pull/375 - Exploit, Patch, Third Party Advisory~~	() https://github.com/go-yaml/yaml/pull/375 - Exploit, Patch, Third Party Advisory
References	~~() https://lists.debian.org/debian-lts-announce/2023/07/msg00001.html -~~	() https://lists.debian.org/debian-lts-announce/2023/07/msg00001.html -
References	~~() https://pkg.go.dev/vuln/GO-2021-0061 - Third Party Advisory~~	() https://pkg.go.dev/vuln/GO-2021-0061 - Third Party Advisory

Information

Published : 2022-12-27 22:15

Updated : 2025-04-11 17:15

NVD link : CVE-2021-4235

Mitre link : CVE-2021-4235

CVE.ORG link : CVE-2021-4235

JSON object : View

Products Affected

yaml_project

yaml

CWE

NVD-CWE-noinfo

{"id": "CVE-2021-4235", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.5, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 1.8}, {"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.5, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 1.8}]}, "published": "2022-12-27T22:15:11.960", "references": [{"url": "https://github.com/go-yaml/yaml/commit/bb4e33bf68bf89cad44d386192cbed201f35b241", "tags": ["Patch", "Third Party Advisory"], "source": "security@golang.org"}, {"url": "https://github.com/go-yaml/yaml/pull/375", "tags": ["Exploit", "Patch", "Third Party Advisory"], "source": "security@golang.org"}, {"url": "https://lists.debian.org/debian-lts-announce/2023/07/msg00001.html", "source": "security@golang.org"}, {"url": "https://pkg.go.dev/vuln/GO-2021-0061", "tags": ["Third Party Advisory"], "source": "security@golang.org"}, {"url": "https://github.com/go-yaml/yaml/commit/bb4e33bf68bf89cad44d386192cbed201f35b241", "tags": ["Patch", "Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://github.com/go-yaml/yaml/pull/375", "tags": ["Exploit", "Patch", "Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://lists.debian.org/debian-lts-announce/2023/07/msg00001.html", "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://pkg.go.dev/vuln/GO-2021-0061", "tags": ["Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "NVD-CWE-noinfo"}]}], "descriptions": [{"lang": "en", "value": "Due to unbounded alias chasing, a maliciously crafted YAML file can cause the system to consume significant system resources. If parsing user input, this may be used as a denial of service vector."}, {"lang": "es", "value": "Debido a la b\u00fasqueda ilimitada de alias, un archivo YAML creado con fines malintencionados puede hacer que el sistema consuma importantes recursos. Si se analiza la entrada del usuario, esto se puede utilizar como un vector de denegaci\u00f3n de servicio."}], "lastModified": "2025-04-11T17:15:35.497", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:yaml_project:yaml:*:*:*:*:*:go:*:*", "vulnerable": true, "matchCriteriaId": "6ADB4662-19BA-4FB2-88FB-0D8309DE5DB0", "versionEndExcluding": "2.2.3"}], "operator": "OR"}]}], "sourceIdentifier": "security@golang.org"}

5.5 /10