CVE-2021-0227 (GCVE-0-2021-0227)
Vulnerability from cvelistv5 – Published: 2021-04-22 19:36 – Updated: 2024-09-16 17:14
VLAI
EPSS
VEX
Title
Junos OS: SRX Series: Denial of Service in J-Web upon receipt of crafted HTTP packets
Summary
An improper restriction of operations within the bounds of a memory buffer vulnerability in Juniper Networks Junos OS J-Web on SRX Series devices allows an attacker to cause Denial of Service (DoS) by sending certain crafted HTTP packets. Continued receipt and processing of these packets will create a sustained Denial of Service (DoS) condition. When this issue occurs, web-management, NTP daemon (ntpd) and Layer 2 Control Protocol process (L2CPD) daemons might crash. This issue affects Juniper Networks Junos OS on SRX Series: 17.3 versions prior to 17.3R3-S9; 17.4 versions prior to 17.4R2-S11, 17.4R3-S2; 18.2 versions prior to 18.2R3-S5; 18.3 versions prior to 18.3R2-S4, 18.3R3-S3; 18.4 versions prior to 18.4R2-S5, 18.4R3-S4; 19.1 versions prior to 19.1R3-S2; 19.2 versions prior to 19.2R1-S5, 19.2R3; 19.3 versions prior to 19.3R3; 19.4 versions prior to 19.4R2-S1, 19.4R3; 20.1 versions prior to 20.1R1-S2, 20.1R2;
Severity
7.5 (High)
CWE
- CWE-119 - Improper Restriction of Operations within the Bounds of a Memory Buffer
- Denial of Service (DoS)
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://kb.juniper.net/JSA11122 | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Juniper Networks | Junos OS |
Affected:
17.3 , < 17.3R3-S9
(custom)
Affected: 17.4 , < 17.4R2-S11, 17.4R3-S2 (custom) Affected: 18.2 , < 18.2R3-S5 (custom) Affected: 18.3 , < 18.3R2-S4, 18.3R3-S3 (custom) Affected: 18.4 , < 18.4R2-S5, 18.4R3-S4 (custom) Affected: 19.1 , < 19.1R3-S2 (custom) Affected: 19.2 , < 19.2R1-S5, 19.2R3 (custom) Affected: 19.3 , < 19.3R3 (custom) Affected: 19.4 , < 19.4R2-S1, 19.4R3 (custom) Affected: 20.1 , < 20.1R1-S2, 20.1R2 (custom) |
guessed |
Date Public
2021-04-14 00:00
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"value": "Una vulnerabilidad de restricci\u00f3n inapropiada de operaciones dentro de los l\u00edmites de un b\u00fafer de memoria en Juniper Networks Junos OS J-Web en dispositivos de la serie SRX permite a un atacante causar una Denegaci\u00f3n de Servicio (DoS) mediante el env\u00edo de determinados paquetes HTTP dise\u00f1ados.\u0026#xa0;La recepci\u00f3n y el procesamiento continuo de estos paquetes crear\u00e1n una condici\u00f3n sostenida de Denegaci\u00f3n de Servicio (DoS).\u0026#xa0;Cuando ocurre este problema, la administraci\u00f3n web, el demonio NTP (ntpd) y el demonio del proceso Layer 2 Control Protocol (L2CPD) pueden bloquearse.\u0026#xa0;Este problema afecta a Juniper Networks Junos OS en la serie SRX: versiones 17.3 anteriores a 17.3R3-S9;\u0026#xa0;versiones 17.4 anteriores a 17.4R2-S11, 17.4R3-S2;\u0026#xa0;versiones 18.2 anteriores a 18.2R3-S5;\u0026#xa0;versiones 18.3 anteriores a 18.3R2-S4, 18.3R3-S3;\u0026#xa0;versiones 18.4 anteriores a 18.4R2-S5, 18.4R3-S4;\u0026#xa0;versiones 19.1 anteriores a 19.1R3-S2;\u0026#xa0;versiones 19.2 anteriores a 19.2R1-S5, 19.2R3;\u0026#xa0;versiones 19.3 anteriores a 19.3R3;\u0026#xa0;versiones 19.\u0026#xa0;4 anteriores a 19.4R2-S1, 19.4R3;\u0026#xa0;versiones 20.1 anteriores a 20.1R1-S2, 20.1R2;"
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"matchCriteriaId": "2FDDC897-747F-44DD-9599-7266F9B5B7B1",
"vulnerable": false
},
{
"criteria": "cpe:2.3:h:juniper:srx550:-:*:*:*:*:*:*:*",
"matchCriteriaId": "62FC145A-D477-4C86-89E7-F70F52773801",
"vulnerable": false
},
{
"criteria": "cpe:2.3:h:juniper:srx5600:-:*:*:*:*:*:*:*",
"matchCriteriaId": "68CA098D-CBE4-4E62-9EC0-43E1B6098710",
"vulnerable": false
},
{
"criteria": "cpe:2.3:h:juniper:srx5800:-:*:*:*:*:*:*:*",
"matchCriteriaId": "66F474D4-79B6-4525-983C-9A9011BD958B",
"vulnerable": false
},
{
"criteria": "cpe:2.3:h:juniper:srx650:-:*:*:*:*:*:*:*",
"matchCriteriaId": "8AA424D4-4DBF-4E8C-96B8-E37741B5403E",
"vulnerable": false
}
],
"negate": false,
"operator": "OR"
}
],
"operator": "AND"
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "An improper restriction of operations within the bounds of a memory buffer vulnerability in Juniper Networks Junos OS J-Web on SRX Series devices allows an attacker to cause Denial of Service (DoS) by sending certain crafted HTTP packets. Continued receipt and processing of these packets will create a sustained Denial of Service (DoS) condition. When this issue occurs, web-management, NTP daemon (ntpd) and Layer 2 Control Protocol process (L2CPD) daemons might crash. This issue affects Juniper Networks Junos OS on SRX Series: 17.3 versions prior to 17.3R3-S9; 17.4 versions prior to 17.4R2-S11, 17.4R3-S2; 18.2 versions prior to 18.2R3-S5; 18.3 versions prior to 18.3R2-S4, 18.3R3-S3; 18.4 versions prior to 18.4R2-S5, 18.4R3-S4; 19.1 versions prior to 19.1R3-S2; 19.2 versions prior to 19.2R1-S5, 19.2R3; 19.3 versions prior to 19.3R3; 19.4 versions prior to 19.4R2-S1, 19.4R3; 20.1 versions prior to 20.1R1-S2, 20.1R2;"
},
{
"lang": "es",
"value": "Una vulnerabilidad de restricci\u00f3n inapropiada de operaciones dentro de los l\u00edmites de un b\u00fafer de memoria en Juniper Networks Junos OS J-Web en dispositivos de la serie SRX permite a un atacante causar una Denegaci\u00f3n de Servicio (DoS) mediante el env\u00edo de determinados paquetes HTTP dise\u00f1ados.\u0026#xa0;La recepci\u00f3n y el procesamiento continuo de estos paquetes crear\u00e1n una condici\u00f3n sostenida de Denegaci\u00f3n de Servicio (DoS).\u0026#xa0;Cuando ocurre este problema, la administraci\u00f3n web, el demonio NTP (ntpd) y el demonio del proceso Layer 2 Control Protocol (L2CPD) pueden bloquearse.\u0026#xa0;Este problema afecta a Juniper Networks Junos OS en la serie SRX: versiones 17.3 anteriores a 17.3R3-S9;\u0026#xa0;versiones 17.4 anteriores a 17.4R2-S11, 17.4R3-S2;\u0026#xa0;versiones 18.2 anteriores a 18.2R3-S5;\u0026#xa0;versiones 18.3 anteriores a 18.3R2-S4, 18.3R3-S3;\u0026#xa0;versiones 18.4 anteriores a 18.4R2-S5, 18.4R3-S4;\u0026#xa0;versiones 19.1 anteriores a 19.1R3-S2;\u0026#xa0;versiones 19.2 anteriores a 19.2R1-S5, 19.2R3;\u0026#xa0;versiones 19.3 anteriores a 19.3R3;\u0026#xa0;versiones 19.\u0026#xa0;4 anteriores a 19.4R2-S1, 19.4R3;\u0026#xa0;versiones 20.1 anteriores a 20.1R1-S2, 20.1R2;"
}
],
"id": "CVE-2021-0227",
"lastModified": "2024-11-21T05:42:15.040",
"metrics": {
"cvssMetricV2": [
{
"acInsufInfo": false,
"baseSeverity": "MEDIUM",
"cvssData": {
"accessComplexity": "LOW",
"accessVector": "NETWORK",
"authentication": "NONE",
"availabilityImpact": "PARTIAL",
"baseScore": 5.0,
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P",
"version": "2.0"
},
"exploitabilityScore": 10.0,
"impactScore": 2.9,
"obtainAllPrivilege": false,
"obtainOtherPrivilege": false,
"obtainUserPrivilege": false,
"source": "nvd@nist.gov",
"type": "Primary",
"userInteractionRequired": false
}
],
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
},
"exploitabilityScore": 3.9,
"impactScore": 3.6,
"source": "sirt@juniper.net",
"type": "Secondary"
}
]
},
"published": "2021-04-22T20:15:08.533",
"references": [
{
"source": "sirt@juniper.net",
"tags": [
"Vendor Advisory"
],
"url": "https://kb.juniper.net/JSA11122"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Vendor Advisory"
],
"url": "https://kb.juniper.net/JSA11122"
}
],
"sourceIdentifier": "sirt@juniper.net",
"vulnStatus": "Modified",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-119"
}
],
"source": "sirt@juniper.net",
"type": "Secondary"
},
{
"description": [
{
"lang": "en",
"value": "CWE-119"
}
],
"source": "nvd@nist.gov",
"type": "Primary"
}
]
}
},
"redhat_vex": {
"current_release_date": "2026-03-27T15:15:22+00:00",
"cve": "CVE-2021-0227",
"id": "CVE-2021-0227",
"initial_release_date": "2021-04-14T00:00:00+00:00",
"product_status:known_not_affected": "1",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "Junos OS: SRX Series: Denial of Service in J-Web upon receipt of crafted HTTP packets",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2021/cve-2021-0227.json",
"version": "3"
}
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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