CVE-2021-31351 (GCVE-0-2021-31351)
Vulnerability from cvelistv5 – Published: 2021-10-19 18:16 – Updated: 2024-09-17 01:26
VLAI
EPSS
VEX
Title
Junos OS: MX Series: Receipt of specific packet on MS-MPC/MS-MIC causes line card reset
Summary
An Improper Check for Unusual or Exceptional Conditions in packet processing on the MS-MPC/MS-MIC utilized by Juniper Networks Junos OS allows a malicious attacker to send a specific packet, triggering the MS-MPC/MS-MIC to reset, causing a Denial of Service (DoS). Continued receipt and processing of this packet will create a sustained Denial of Service (DoS) condition. This issue only affects specific versions of Juniper Networks Junos OS on MX Series: 17.3R3-S11; 17.4R2-S13; 17.4R3 prior to 17.4R3-S5; 18.1R3-S12; 18.2R2-S8, 18.2R3-S7, 18.2R3-S8; 18.3R3-S4; 18.4R3-S7; 19.1R3-S4, 19.1R3-S5; 19.2R1-S6; 19.3R3-S2; 19.4R2-S4, 19.4R2-S5; 19.4R3-S2; 20.1R2-S1; 20.2R2-S2, 20.2R2-S3, 20.2R3; 20.3R2, 20.3R2-S1; 20.4R1, 20.4R1-S1, 20.4R2; 21.1R1; This issue does not affect any version of Juniper Networks Junos OS prior to 15.1X49-D240;
Severity
7.5 (High)
CWE
- CWE-754 - Improper Check for Unusual or Exceptional Conditions
- Denial of Service (DoS)
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://kb.juniper.net/JSA11216 | x_refsource_CONFIRM |
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Juniper Networks | Junos OS |
Unaffected:
unspecified , < 15.1
(custom)
Unaffected: 17.3 , < 17.3R3-S11 (custom) Unaffected: 17.4R3 , < 17.4* (custom) |
guessed | |
| Juniper Networks | Junos OS |
Affected:
17.3R3-S11
Affected: 18.1R3-S12 Affected: 18.3R3-S4 Affected: 18.4R3-S7 Affected: 19.1R3-S4, 19.1R3-S5 Affected: 19.2R1-S6 Affected: 19.3R3-S2 Affected: 19.4R3-S2 Affected: 20.1R2-S1 Affected: 20.2R3 Affected: 20.3R2 Affected: 17.4R2-S13 , < 17.4* (custom) Affected: 18.2R2-S8, 18.2R3-S7 , < 18.2* (custom) Affected: 18.4R1-S8, 18.4R2-S7 , < 18.4* (custom) Affected: 19.4R2-S4 , < 19.4* (custom) Affected: 20.2R2-S2 , < 20.2* (custom) Affected: 20.3R1-S2 , < 20.3* (custom) Affected: 20.4 , < 20.4R2-S1, 20.4R3 (custom) Affected: 21.1 , < 21.1R1-S1, 21.1R2 (custom) |
guessed |
Date Public
2021-10-13 00:00
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"descriptions": "[{\"lang\": \"en\", \"value\": \"An Improper Check for Unusual or Exceptional Conditions in packet processing on the MS-MPC/MS-MIC utilized by Juniper Networks Junos OS allows a malicious attacker to send a specific packet, triggering the MS-MPC/MS-MIC to reset, causing a Denial of Service (DoS). Continued receipt and processing of this packet will create a sustained Denial of Service (DoS) condition. This issue only affects specific versions of Juniper Networks Junos OS on MX Series: 17.3R3-S11; 17.4R2-S13; 17.4R3 prior to 17.4R3-S5; 18.1R3-S12; 18.2R2-S8, 18.2R3-S7, 18.2R3-S8; 18.3R3-S4; 18.4R3-S7; 19.1R3-S4, 19.1R3-S5; 19.2R1-S6; 19.3R3-S2; 19.4R2-S4, 19.4R2-S5; 19.4R3-S2; 20.1R2-S1; 20.2R2-S2, 20.2R2-S3, 20.2R3; 20.3R2, 20.3R2-S1; 20.4R1, 20.4R1-S1, 20.4R2; 21.1R1; This issue does not affect any version of Juniper Networks Junos OS prior to 15.1X49-D240;\"}, {\"lang\": \"es\", \"value\": \"Una comprobaci\\u00f3n inapropiada de condiciones inusuales o excepcionales en el procesamiento de paquetes en el MS-MPC/MS-MIC usado por Juniper Networks Junos OS permite a un atacante malicioso enviar un paquete espec\\u00edfico, haciendo que el MS-MPC/MS-MIC se reinicie, causando una Denegaci\\u00f3n de Servicio (DoS). Si se sigue recibiendo y procesando este paquete, se crear\\u00e1 una condici\\u00f3n de Denegaci\\u00f3n de Servicio (DoS) sostenida. Este problema s\\u00f3lo afecta a versiones espec\\u00edficas de Juniper Networks Junos OS en la serie MX: 17.3R3-S11; 17.4R2-S13; 17.4R3 anterior a 17.4R3-S5; 18.1R3-S12; 18.2R2-S8, 18.2R3-S7, 18.2R3-S8; 18.3R3-S4; 18.4R3-S7; 19.1R3-S4, 19.1R3-S5; 19.2R1-S6; 19.3R3-S2; 19.4R2-S4, 19.4R2-S5; 19. 4R3-S2; 20.1R2-S1; 20.2R2-S2, 20.2R2-S3, 20.2R3; 20.3R2, 20.3R2-S1; 20.4R1, 20.4R1-S1, 20.4R2; 21.1R1; Este problema no afecta a ninguna versi\\u00f3n de Juniper Networks Junos OS anterior a la 15.1X49-D240;\"}]",
"id": "CVE-2021-31351",
"lastModified": "2024-11-21T06:05:28.723",
"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}]}",
"published": "2021-10-19T19:15:08.597",
"references": "[{\"url\": \"https://kb.juniper.net/JSA11216\", \"source\": \"sirt@juniper.net\", \"tags\": [\"Vendor Advisory\"]}, {\"url\": \"https://kb.juniper.net/JSA11216\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Vendor Advisory\"]}]",
"sourceIdentifier": "sirt@juniper.net",
"vulnStatus": "Modified",
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},
"nvd": "{\"cve\":{\"id\":\"CVE-2021-31351\",\"sourceIdentifier\":\"sirt@juniper.net\",\"published\":\"2021-10-19T19:15:08.597\",\"lastModified\":\"2024-11-21T06:05:28.723\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"An Improper Check for Unusual or Exceptional Conditions in packet processing on the MS-MPC/MS-MIC utilized by Juniper Networks Junos OS allows a malicious attacker to send a specific packet, triggering the MS-MPC/MS-MIC to reset, causing a Denial of Service (DoS). Continued receipt and processing of this packet will create a sustained Denial of Service (DoS) condition. 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Este problema s\u00f3lo afecta a versiones espec\u00edficas de Juniper Networks Junos OS en la serie MX: 17.3R3-S11; 17.4R2-S13; 17.4R3 anterior a 17.4R3-S5; 18.1R3-S12; 18.2R2-S8, 18.2R3-S7, 18.2R3-S8; 18.3R3-S4; 18.4R3-S7; 19.1R3-S4, 19.1R3-S5; 19.2R1-S6; 19.3R3-S2; 19.4R2-S4, 19.4R2-S5; 19. 4R3-S2; 20.1R2-S1; 20.2R2-S2, 20.2R2-S3, 20.2R3; 20.3R2, 20.3R2-S1; 20.4R1, 20.4R1-S1, 20.4R2; 21.1R1; Este problema no afecta a ninguna versi\u00f3n de Juniper Networks Junos OS anterior a la 15.1X49-D240;\"}],\"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\":\"sirt@juniper.net\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-754\"}]},{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-754\"}]}],\"configurations\":[{\"operator\":\"AND\",\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:juniper:junos:17.3:r3-s11:*:*:*:*:*:*\",\"matchCriteriaId\":\"DE0C7BD5-4D13-4C20-B2C9-524F72B206F2\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:juniper:junos:17.4:r2-s13:*:*:*:*:*:*\",\"matchCriteriaId\":\"03BCD35E-29D3-4F8C-ABE9-32C7010FD796\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:juniper:junos:17.4:r3:*:*:*:*:*:*\",\"matchCriteriaId\":\"8732E25A-9073-4C7B-9E89-C02368728EB4\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:juniper:junos:17.4:r3-s1:*:*:*:*:*:*\",\"matchCriteriaId\":\"09255363-BF79-4FC3-AADD-5FAD0902174F\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:juniper:junos:17.4:r3-s2:*:*:*:*:*:*\",\"matchCriteriaId\":\"11A24AA6-5378-4EEA-82D5-66A5F1110698\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:juniper:junos:17.4:r3-s3:*:*:*:*:*:*\",\"matchCriteriaId\":\"64CF2868-993A-48C8-8FBA-892507BBBF21\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:juniper:junos:17.4:r3-s4:*:*:*:*:*:*\",\"matchCriteriaId\":\"D2D5D460-EC5C-46BF-8017-CB87B45C69BD\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:juniper:junos:18.1:r3-s12:*:*:*:*:*:*\",\"matchCriteriaId\":\"46F9BD74-D57A-4689-81AB-D53DEBABBD5E\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:juniper:junos:18.2:r2-s8:*:*:*:*:*:*\",\"matchCriteriaId\":\"27D9AEBC-2CA3-4E17-9543-D60B10BA2AE1\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:juniper:junos:18.2:r3-s7:*:*:*:*:*:*\",\"matchCriteriaId\":\"F2DEF924-0165-41B5-8A9D-A75596433CD2\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:juniper:junos:18.2:r3-s8:*:*:*:*:*:*\",\"matchCriteriaId\":\"72BA91B4-6595-4CD1-82F7-535AE2D0305A\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:juniper:junos:18.3:r3-s4:*:*:*:*:*:*\",\"matchCriteriaId\":\"75F125DC-3A21-489F-B324-A586F5BA350A\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:juniper:junos:18.4:r3-s7:*:*:*:*:*:*\",\"matchCriteriaId\":\"14FC491D-8DA8-4E79-A9A6-3629E41C847A\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:juniper:junos:19.1:r3-s4:*:*:*:*:*:*\",\"matchCriteriaId\":\"69E2DF80-63D8-48DD-BC73-C406B7AA3C7D\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:juniper:junos:19.1:r3-s5:*:*:*:*:*:*\",\"matchCriteriaId\":\"8120EAC3-DCCB-4429-A372-C0DAA3270A1F\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:juniper:junos:19.2:r1-s6:*:*:*:*:*:*\",\"matchCriteriaId\":\"ADCE4EA8-DDBA-4766-BB81-E4DA29723723\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:juniper:junos:19.3:r3-s2:*:*:*:*:*:*\",\"matchCriteriaId\":\"D3FEA876-302D-4F07-94E6-237C669538F2\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:juniper:junos:19.4:r2-s4:*:*:*:*:*:*\",\"matchCriteriaId\":\"760E2418-B945-4467-BDAC-7702DDF4C4EE\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:juniper:junos:19.4:r2-s5:*:*:*:*:*:*\",\"matchCriteriaId\":\"98097AB6-56CB-42E4-96B4-ABBD4F36553C\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:juniper:junos:19.4:r3-s2:*:*:*:*:*:*\",\"matchCriteriaId\":\"ED73BF1A-96E4-49F1-A6AA-7B29DAA6C112\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:juniper:junos:20.1:r2-s1:*:*:*:*:*:*\",\"matchCriteriaId\":\"D9789FF8-D55C-4AF9-A250-E543A0EB826F\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:juniper:junos:20.2:r2-s2:*:*:*:*:*:*\",\"matchCriteriaId\":\"8E0D4959-3865-42A7-98CD-1103EBD84528\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:juniper:junos:20.2:r2-s3:*:*:*:*:*:*\",\"matchCriteriaId\":\"3A58292B-814C-49E7-8D6D-BE26EFB9ADDF\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:juniper:junos:20.2:r3:*:*:*:*:*:*\",\"matchCriteriaId\":\"681AE183-7183-46E7-82EA-28C398FA1C3D\"},{\"vulner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Advisory\"]},{\"url\":\"https://kb.juniper.net/JSA11216\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Vendor Advisory\"]}]}}",
"redhat_vex": {
"current_release_date": "2026-03-27T14:08:35+00:00",
"cve": "CVE-2021-31351",
"id": "CVE-2021-31351",
"initial_release_date": "2021-10-13T00:00:00+00:00",
"product_status:known_not_affected": "1",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "Junos OS: MX Series: Receipt of specific packet on MS-MPC/MS-MIC causes line card reset",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2021/cve-2021-31351.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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