CVE-2023-36835 (GCVE-0-2023-36835)
Vulnerability from cvelistv5 – Published: 2023-07-14 17:11 – Updated: 2024-11-07 14:24
VLAI
EPSS
VEX
Title
Junos OS: QFX10000 Series: All traffic will be dropped after a specific valid IP packet has been received which needs to be routed over a VXLAN tunnel
Summary
An Improper Check for Unusual or Exceptional Conditions vulnerability in the Packet Forwarding Engine (PFE) of Juniper Networks Junos OS on QFX10000 Series allows a network based attacker to cause a Denial of Service (DoS).
If a specific valid IP packet is received and that packet needs to be routed over a VXLAN tunnel, this will result in a PFE wedge condition due to which traffic gets impacted. As this is not a crash and restart scenario, this condition will persist until the system is rebooted to recover.
This issue affects Juniper Networks Junos OS on QFX10000:
20.3 version 20.3R1 and later versions;
20.4 versions prior to 20.4R3-S5;
21.1 versions prior to 21.1R3-S5;
21.2 versions prior to 21.2R3-S5;
21.3 versions prior to 21.3R3-S4;
21.4 versions prior to 21.4R3-S1;
22.1 versions prior to 22.1R3;
22.2 versions prior to 22.2R2;
22.3 versions prior to 22.3R1-S2, 22.3R2.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-11-07 14:18 UTC
CWE
- CWE-754 - Improper Check for Unusual or Exceptional Conditions
- Denial of Service (DoS)
Assigner
References
1 reference
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Juniper Networks | Junos OS |
Affected:
20.3 , < 20.3*
(custom)
Affected: 20.4 , < 20.4R3-S5 (custom) Affected: 21.1 , < 21.1R3-S5 (custom) Affected: 21.2 , < 21.2R3-S5 (custom) Affected: 21.3 , < 21.3R3-S4 (custom) Affected: 21.4 , < 21.4R3-S1 (custom) Affected: 22.1 , < 22.1R3 (custom) Affected: 22.2 , < 22.2R2 (custom) Affected: 22.3 , < 22.3R1-S2, 22.3R2 (custom) |
guessed | |
| juniper_networks | junos_os |
Affected:
20.3 , < 20.3*
(custom)
Affected: 20.4 , < 20.4R3-S5 (custom) Affected: 21.1 , < 21.1R3-S5 (custom) Affected: 21.2 , < 21.2R3-S5 (custom) Affected: 21.3 , < 21.3R3-S4 (custom) Affected: 21.4 , < 21.4R3-S1 (custom) Affected: 22.1 , < 22.1R3 (custom) Affected: 22.2 , < 22.2R2 (custom) Affected: 22.3 , < 22.3R1-S2 (custom) Affected: 22.3 , < 22.3R2 (custom) cpe:2.3:a:juniper_networks:junos_os:*:*:*:*:*:*:*:* |
Date Public
2023-07-12 16:00
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"value": "To be exposed to this issue the QFX device needs be configured for VXLAN with either of the following statements:\u003cbr\u003e\u003cbr\u003e\u003ctt\u003e\u0026nbsp; [ vlans \u0026lt;vlan\u0026gt; vxlan ]\u003cbr\u003e\u003cbr\u003e\u0026nbsp; [ routing-instances \u0026lt;routing-instance\u0026gt; vxlan ]\u003c/tt\u003e"
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"value": "To be exposed to this issue the QFX device needs be configured for VXLAN with either of the following statements:\n\n\u00a0 [ vlans \u003cvlan\u003e vxlan ]\n\n\u00a0 [ routing-instances \u003crouting-instance\u003e vxlan ]"
}
],
"datePublic": "2023-07-12T16:00:00.000Z",
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"value": "An Improper Check for Unusual or Exceptional Conditions vulnerability in the Packet Forwarding Engine (PFE) of Juniper Networks Junos OS on QFX10000 Series allows a network based attacker to cause a Denial of Service (DoS).\u003cbr\u003e\u003cbr\u003eIf a specific valid IP packet is received and that packet needs to be routed over a VXLAN tunnel, this will result in a PFE wedge condition due to which traffic gets impacted. As this is not a crash and restart scenario, this condition will persist until the system is rebooted to recover.\u003cbr\u003e\u003cbr\u003eThis issue affects Juniper Networks Junos OS on QFX10000:\u003cbr\u003e20.3 version 20.3R1 and later versions;\u003cbr\u003e20.4 versions prior to 20.4R3-S5;\u003cbr\u003e21.1 versions prior to 21.1R3-S5;\u003cbr\u003e21.2 versions prior to 21.2R3-S5;\u003cbr\u003e21.3 versions prior to 21.3R3-S4;\u003cbr\u003e21.4 versions prior to 21.4R3-S1;\u003cbr\u003e22.1 versions prior to 22.1R3;\u003cbr\u003e22.2 versions prior to 22.2R2;\u003cbr\u003e22.3 versions prior to 22.3R1-S2, 22.3R2.\u003cbr\u003e"
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"value": "An Improper Check for Unusual or Exceptional Conditions vulnerability in the Packet Forwarding Engine (PFE) of Juniper Networks Junos OS on QFX10000 Series allows a network based attacker to cause a Denial of Service (DoS).\n\nIf a specific valid IP packet is received and that packet needs to be routed over a VXLAN tunnel, this will result in a PFE wedge condition due to which traffic gets impacted. As this is not a crash and restart scenario, this condition will persist until the system is rebooted to recover.\n\nThis issue affects Juniper Networks Junos OS on QFX10000:\n20.3 version 20.3R1 and later versions;\n20.4 versions prior to 20.4R3-S5;\n21.1 versions prior to 21.1R3-S5;\n21.2 versions prior to 21.2R3-S5;\n21.3 versions prior to 21.3R3-S4;\n21.4 versions prior to 21.4R3-S1;\n22.1 versions prior to 22.1R3;\n22.2 versions prior to 22.2R2;\n22.3 versions prior to 22.3R1-S2, 22.3R2.\n"
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"integrityImpact": "NONE",
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"scope": "UNCHANGED",
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"source": {
"advisory": "JSA71642",
"defect": [
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"discovery": "USER"
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"title": "Junos OS: QFX10000 Series: All traffic will be dropped after a specific valid IP packet has been received which needs to be routed over a VXLAN tunnel",
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"cveId": "CVE-2023-36835",
"datePublished": "2023-07-14T17:11:26.454Z",
"dateReserved": "2023-06-27T16:17:25.276Z",
"dateUpdated": "2024-11-07T14:24:52.880Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
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}
}
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Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.
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.
Vulnerability timeline
Sightings and recorded dates, grouped by day · UTC
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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.