CVE-2021-0250 (GCVE-0-2021-0250)
Vulnerability from cvelistv5 – Published: 2021-04-22 19:37 – Updated: 2024-09-17 00:20
VLAI
EPSS
VEX
Title
Junos OS and Junos OS Evolved: An attacker sending a specific crafted BGP update message will crash RPD
Summary
In segment routing traffic engineering (SRTE) environments where the BGP Monitoring Protocol (BMP) feature is enable, a vulnerability in the Routing Protocol Daemon (RPD) process of Juniper Networks Junos OS allows an attacker to send a specific crafted BGP update message causing the RPD service to core, creating a Denial of Service (DoS) Condition. Continued receipt and processing of this update message will create a sustained Denial of Service (DoS) condition. This issue affects IPv4 and IPv6 environments. This issue affects: Juniper Networks Junos OS 17.4 versions 17.4R1 and above prior to 17.4R2-S6, 17.4R3; 18.1 versions prior to 18.1R3-S7; 18.2 versions prior to 18.2R2-S6, 18.2R3-S3; 18.3 versions prior to 18.3R1-S7, 18.3R2-S3, 18.3R3; 18.4 versions prior to 18.4R1-S5, 18.4R2-S3, 18.4R3; 19.1 versions prior to 19.1R1-S4, 19.1R2; 19.2 versions prior to 19.2R1-S3, 19.2R2, This issue does not affect Junos OS releases prior to 17.4R1. This issue affects: Juniper Networks Junos OS Evolved 19.2-EVO versions prior to 19.2R2-EVO.
Severity
7.5 (High)
CWE
- Denial of Service (DoS)
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://kb.juniper.net/JSA11143 | x_refsource_MISC |
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Juniper Networks | Junos OS |
Affected:
17.4R1 , < unspecified
(custom)
Affected: 17.4 , < 17.4R2-S6, 17.4R3 (custom) Affected: 18.1 , < 18.1R3-S7 (custom) Affected: 18.2 , < 18.2R2-S6, 18.2R3-S3 (custom) Affected: 18.3 , < 18.3R1-S7, 18.3R2-S3, 18.3R3 (custom) Affected: 18.4 , < 18.4R1-S5, 18.4R2-S3, 18.4R3 (custom) Affected: 19.1 , < 19.1R1-S4, 19.1R2 (custom) Affected: 19.2 , < 19.2R1-S3, 19.2R2 (custom) |
guessed | |
| Juniper Networks | Junos OS Evolved |
Affected:
19.2-EVO , < 19.2R2-EVO
(custom)
|
guessed |
Date Public
2021-04-14 00:00
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This issue affects: Juniper Networks Junos OS Evolved 19.2-EVO versions prior to 19.2R2-EVO.\"},{\"lang\":\"es\",\"value\":\"En entornos segment routing traffic engineering (SRTE) donde la funci\u00f3n BGP Monitoring Protocol (BMP) est\u00e1 habilitada, una vulnerabilidad en el proceso Routing Protocol Daemon (RPD) de Juniper Networks Junos OS, permite a un atacante enviar un mensaje de actualizaci\u00f3n de BGP espec\u00edfico que causa el Servicio RPD hacia el n\u00facleo, creando una Condici\u00f3n de Denegaci\u00f3n de Servicio (DoS).\u0026#xa0;La recepci\u00f3n y el procesamiento continuo de este mensaje de actualizaci\u00f3n crear\u00e1n una condici\u00f3n sostenida de Denegaci\u00f3n de Servicio (DoS).\u0026#xa0;Este problema afecta a los entornos IPv4 e IPv6.\u0026#xa0;Este problema afecta a: Juniper Networks Junos OS versiones 17.4, 17.4R1 y superiores, versiones anteriores a 17.4R2-S6, 17.4R3;\u0026#xa0;versiones 18.1 anteriores a 18.1R3-S7;\u0026#xa0;versiones 18.2 anteriores a 18.2R2-S6, 18.2R3-S3;\u0026#xa0;versiones 18.3 anteriores a 18.3R1-S7, 18.3R2-S3, 18.3R3;\u0026#xa0;versiones 18.4 anteriores a 18.4R1-S5, 18.4R2-S3, 18.4R3;\u0026#xa0;versiones 19.1 anteriores a 19.1R1-S4, 19.1R2;\u0026#xa0;versiones 19.\u0026#xa0;2 anteriores a 19.2R1-S3, 19.2R2. Este problema no afecta Junos OS versiones anteriores a 17.4R1.\u0026#xa0;Este problema afecta a: Juniper Networks Junos OS Evolved versiones 19.2-EVO anteriores a 19.2R2-EVO\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"sirt@juniper.net\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":7.5,\"baseSeverity\":\"HIGH\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":3.9,\"impactScore\":3.6}],\"cvssMetricV2\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"2.0\",\"vectorString\":\"AV:N/AC:L/Au:N/C:N/I:N/A:P\",\"baseScore\":5.0,\"accessVector\":\"NETWORK\",\"accessComplexity\":\"LOW\",\"authentication\":\"NONE\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"PARTIAL\"},\"baseSeverity\":\"MEDIUM\",\"exploitabilityScore\":10.0,\"impactScore\":2.9,\"acInsufInfo\":false,\"obtainAllPrivilege\":false,\"obtainUserPrivilege\":false,\"obtainOtherPrivilege\":false,\"userInteractionRequired\":false}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"NVD-CWE-noinfo\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:juniper:junos:17.4:r1:*:*:*:*:*:*\",\"matchCriteriaId\":\"988D317A-0646-491F-9B97-853E8E208276\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:juniper:junos:17.4:r1-s1:*:*:*:*:*:*\",\"matchCriteriaId\":\"605F1AD7-5B09-44F0-9017-15AB3EEE559C\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:juniper:junos:17.4:r1-s2:*:*:*:*:*:*\",\"matchCriteriaId\":\"CEDDCD30-2255-4FA9-B3E2-9E88AB6F8D80\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:juniper:junos:17.4:r1-s3:*:*:*:*:*:*\",\"matchCriteriaId\":\"DF3F9F86-166F-45E4-92B7-3DD3B06199F3\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:juniper:junos:17.4:r1-s4:*:*:*:*:*:*\",\"matchCriteriaId\":\"4E4EB6B0-8DB2-4199-96E4-30195D49F756\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:juniper:junos:17.4:r1-s5:*:*:*:*:*:*\",\"matchCriteriaId\":\"204FC7B5-9CF2-4AC2-9B8D-DA48CAEA6496\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:juniper:junos:17.4:r1-s6:*:*:*:*:*:*\",\"matchCriteriaId\":\"9D8A8E33-473A-4A40-A7B7-47086BB9012A\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:juniper:junos:17.4:r1-s7:*:*:*:*:*:*\",\"matchCriteriaId\":\"F0F65DCA-34B9-4CE8-91C9-426AAAEB4097\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:juniper:junos:17.4:r2:*:*:*:*:*:*\",\"matchCriteriaId\":\"0E0CE79A-157D-47DE-BE65-936BC12470EB\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:juniper:junos:17.4:r2-s1:*:*:*:*:*:*\",\"matchCriteriaId\":\"05060C06-18C1-40E8-AE01-385B036CC9AA\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:juniper:junos:17.4:r2-s2:*:*:*:*:*:*\",\"matchCriteriaId\":\"0C752783-4843-407B-AF33-0E1D36FCAAF8\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:juniper:junos:17.4:r2-s3:*:*:*:*:*:*\",\"matchCriteriaId\":\"006EE425-A146-4E10-B050-7E754BB8402A\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:juniper:junos:17.4:r2-s4:*:*:*:*:*:*\",\"matchCriteriaId\":\"2B482BCC-1F0C-47AA-B63B-1B39CEF7B2C0\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:juniper:junos:17.4:r2-s5:*:*:*:*:*:*\",\"matchCriteriaId\":\"A636F9F2-2DA7-4A27-AD80-FD1B34DFCA94\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:juniper:junos:18.1:-:*:*:*:*:*:*\",\"matchCriteriaId\":\"0DFDD907-5305-4602-8A9C-685AA112C342\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:juniper:junos:18.1:r1:*:*:*:*:*:*\",\"matchCriteriaId\":\"B0A756E2-C320-405A-B24F-7C5022649E5A\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:juniper:junos:18.1:r2:*:*:*:*:*:*\",\"matchCriteriaId\":\"2EF6F4C1-6A7E-474F-89BC-7A3C50FD8CAC\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:juniper:junos:18.1:r2-s1:*:*:*:*:*:*\",\"matchCriteriaId\":\"84F5BCBA-404B-4BC9-B363-CE6D231B0D6D\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:juniper:junos:18.1:r2-s2:*:*:*:*:*:*\",\"matchCriteriaId\":\"18A4CA3E-DA61-49CC-8476-3A476CCB2B83\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:juniper:junos:18.1:r2-s4:*:*:*:*:*:*\",\"matchCriteriaId\":\"A7380B3E-09F5-4497-86C6-11EF56BD89F1\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:juniper:junos:18.1:r3:*:*:*:*:*:*\",\"matchCriteriaId\":\"658841A9-BEC9-433E-81D0-47DE82887C4F\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:juniper:junos:18.1:r3-s1:*:*:*:*:*:*\",\"matchCriteriaId\":\"5AD05209-1274-4F8A-9FA2-A1A8DFCC5755\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:juniper:junos:18.1:r3-s2:*:*:*:*:*:*\",\"matchCriteriaId\":\"C97683B3-A07B-428F-9535-C49B55305679\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:juniper:junos:18.1:r3-s3:*:*:*:*:*:*\",\"matchCriteriaId\":\"A14CE132-C56B-43D8-A248-AB6A2D1A7B6C\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:juniper:junos:18.1:r3-s4:*:*:*:*:*:*\",\"matchCriteriaId\":\"73978DD8-BD92-4872-8F35-AF2B9BCA1ECB\"},{\"vulnera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Advisory\"]},{\"url\":\"https://kb.juniper.net/JSA11143\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Vendor Advisory\"]}]}}",
"redhat_vex": {
"current_release_date": "2026-03-27T15:15:10+00:00",
"cve": "CVE-2021-0250",
"id": "CVE-2021-0250",
"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 and Junos OS Evolved: An attacker sending a specific crafted BGP update message will crash RPD",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2021/cve-2021-0250.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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