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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"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",
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"state": "PUBLISHED"
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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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